What does GROUND mean?

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  • Опубликовано: 9 июн 2024
  • What does GROUND mean?
    In this video we look at different types of ground symbols you may see and why we use different ones. We talk about Earth ground, chassis ground, a generic ground, analog and digital grounds.
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Комментарии • 230

  • @manisteve862
    @manisteve862 2 года назад +28

    Paul, may the memory of your mother always be a blessed one. Peace to you and your family during these days.

  • @joeythompson3579
    @joeythompson3579 2 года назад +15

    It helps to keep busy that helped me when my Mom and Dad passed away

  • @stevetobias4890
    @stevetobias4890 2 года назад +43

    Glad you're mum is finally at peace and no longer suffering. I understand that this doesn't ease your loss of missing her presence but she will always be close as long as you remember the great times you experienced until you're together again. Take care Paul, my thoughts and prayers are with you.

    • @learnelectronics
      @learnelectronics  2 года назад +28

      It does help to make me feel better. The three weeks that she was in the hospital I prayed continuously for God not to take her from me yet. But that last night that we were there I prayed that God would just end her suffering. Right now I'm just numb. But in a week or two when this all settles in who knows where I'll be. I think you so much for your kind words and your thoughts. All of you who watch my channel I consider my friends and family. So hearing from you knowing you're out there supporting me is a great boost.

    • @stevetobias4890
      @stevetobias4890 2 года назад +6

      @@learnelectronics soon after covid I lost a cousin that was like a very close brother. He had been in agony for a few months and being someone who also suffers every hour of every day I understand the peace he finally felt. It was a year before we could gather to spread his ashes and say our goodbyes. I have a small metal vial with some of his ashes but I will never forget him and look forward to once again being reunited with him.

  • @la6mp
    @la6mp 2 года назад +24

    My condolences, I understand life is rough at present. I am impressed that you still made this great video and even included a joke that caught me off-guard! I wish you all the best.

  • @pd1jdw630
    @pd1jdw630 2 года назад +23

    My sincere condolences.
    That’s a short and nice explanation of what ground is. Well done.

    • @howardloveless5965
      @howardloveless5965 2 года назад

      God bless your mom. I hope that you got in to see her before she passed over to god

  • @TheKnightArgent
    @TheKnightArgent 2 года назад +18

    Damn. That's rough. Love to you and yours, my friend.

  • @moya9450
    @moya9450 2 года назад +1

    When You lose someone you love, the most needed thing is to be with your close friend and family. It helps alot. When you post a video 1 day after you lost your mom, it means you love your work and the small community you made here around you. We appreciate that.

  • @vk3zen-rfdesign980
    @vk3zen-rfdesign980 2 года назад +11

    Condolences for you loss Paul.. much love to you and your family. I lost my mother 21 yrs ago...It doesnt go away it just becomes less sharp.. Peace to you and thank you for all the time you give to the electronics community.

  • @cagava6159
    @cagava6159 2 года назад +11

    Be strong mate, god bless you!

  • @DrHWO
    @DrHWO 2 года назад +1

    My condolences, Paul. With all the care, love and support you provided for your mum over the years (and we were witness to only a fraction of that), there can be no self doubt, no self recrimination. Just the satisfaction of a job well done.

    • @learnelectronics
      @learnelectronics  2 года назад +2

      Oh I wish I felt that. But it was my job to keep her safe and I failed. I have no idea how she got Covid. She almost never left the house. When she did she was masked and we used hand sanitizer. Also she was in the first group to get vaccinated. I guess the 35 years of leukemia ruined her immune system to the point that even the monthly infusions of gamaglobulin weren't enough.

    • @DrHWO
      @DrHWO 2 года назад +1

      @@learnelectronics remember that masks, hand sanitizers and gammaglobs are all techniques for risk reduction and not risk removal. Risk removal would have entailed a level of self isolation which would have been unacceptably restrictive. You don’t need me to tell you that most of life’s activities involve a degree of risk and it is in finding the balance that defines us as human beings. So, objectively you have a lot to be proud of. What you are feeling is part of a bereavement reaction and pretty much everyone goes through the same process with only emphasis changing from person to person. In time, that sense of failure will morph into a positive acceptance. Distraction helps. To that end, how about helping me find the choking impedance of my 1:1 choke balun at 3.5, 7.15 and. 14.15 MHz?

  • @dmaestas360
    @dmaestas360 2 года назад +2

    So sorry for your loss. I recently lost my mother this year, too. I know it's hard. Life does go on, but please give yourself time to process and feel. We are all here if you want to talk.

    • @learnelectronics
      @learnelectronics  2 года назад +2

      Thank you

    • @1pcfred
      @1pcfred 2 года назад

      I recently lost my cat. I'm pretty bummed out about it still. My poor kitty cat!

  • @youfrancis
    @youfrancis 2 года назад +2

    Very sorry to hear of your loss. Be safe, Boss. Thanks for the video.

  • @johnprescott6614
    @johnprescott6614 2 года назад +1

    No matter what the circumstances are, it's always difficult when you lose a parent. My sincere condolences.

  • @JasonQuackenbushonGoogle
    @JasonQuackenbushonGoogle 2 года назад +5

    no way through it but going through it. we’re all in this together.

  • @dansteele6043
    @dansteele6043 2 года назад

    Sorry to hear of you’re mother’s passing. Stay strong. It doesn’t go away but the pain you feel will abate with time. Thankfully, the memories will stay with you for the rest of your days.

  • @jaydean5243
    @jaydean5243 2 года назад

    Paul, very sorry for the passing of your Mom, I'm sure she's watching you in your expertise and smiling down on you. (my mom passed away when I was 25, I know what your feeling now I'm 71, they are never here long enough no matter their age) I recently started watching your channel. Just Wonderful.Jay

  • @sephyp1611
    @sephyp1611 2 года назад

    I am sorry for your loss. I noticed several days ago you were talking about your mom being hospitalized, I was hoping it would turn out different.
    Hope you and your sister are OK.
    I am looking forward to hearing from you soon again.
    Stay safe.

  • @TheRadiogeek
    @TheRadiogeek 2 года назад +1

    So sorry to hear about your loss Paul. I know it’s never easy to lose somebody you truly love particularly a parent, but as somebody who has lost both parents I can tell you the best thing you can do is do things to make them proud and remember them every day. Good luck to you Paul and God bless.

  • @kalvinnoble488
    @kalvinnoble488 2 года назад +2

    First, my condolences to you, your mom's family, your mom's friends and your mom's loved ones in regards to your mom's passing on Sept.25th. I lost my twin brother who passed away on Feb. 11th this year. Because of Covid, we couldn't do his memorial service and burial until Aug. 1 this year. We are still waiting on the covid situation to improve to do a Celebration of Life for him.
    Second, thanks for the review on the different types of ground. When I studied electronics, we were taught earth and chasis ground only.
    Thanks for what you do and don't stop doing what you do.

    • @learnelectronics
      @learnelectronics  2 года назад +4

      Are you in the United States? If you are and your brother has covid on his death certificate you will qualify for up to $9,000 in funeral reimbursement from FEMA. I had never heard of this until yesterday when we made my mother's arrangements. So if you and your family don't know about this please look into it. Of course it doesn't bring anyone back, but it helps offset the loss a little bit

    • @kalvinnoble488
      @kalvinnoble488 2 года назад

      Unfortunately, no, my family is from and resides in Canada. My brother's death was not related to Covid-19, but to his heart giving out because of heart attacks. But, thanks for the info. I will pass it on to my wife who resides in Texas.

  • @michaelpadovani9566
    @michaelpadovani9566 2 года назад +2

    My sincere condolences. Glad you made this video, thank you for clearing up a question i had with our dataloggers. Basically analog ground was separated from power ground but when i put a multimeter on continuity across both terminals, i had continuity. You mentioned they are connected but "downstream" of the measuring circuit, from what i now understand.

    • @learnelectronics
      @learnelectronics  2 года назад +5

      The connection of the analog and digital grounds is generally the last step in the process. You have your analog circuitry all grounded together. Then you have your digital circuitry all grounded together. And eventually you can connect those two points together. That's the key. The connection of just the two points not all the separate analog and digital grounds. I know it doesn't seem like it makes sense but just by having one connection you eliminate the loops

    • @michaelpadovani9566
      @michaelpadovani9566 2 года назад

      @@learnelectronics thanks!

  • @ForgedEggs
    @ForgedEggs 2 года назад +1

    My heart weeps with you Paul, the only thing I can say is that life sucks for you right now, but your mother is in a better place without suffering, it's a razor thin silver lining, but it's the best I can do from the other side of the internet.
    Stay strong brother.

    • @learnelectronics
      @learnelectronics  2 года назад

      35 years of leukemia, 30 years of diabetes, and covid. You're absolutely right she's no longer suffering she's free of the pain and hopefully in a better place

  • @deankq4adj125
    @deankq4adj125 2 года назад

    Deepest sympathies my friend - we only have one mom and they are always very special to us. May GOD bless you and your family during your time of grief! BTW - Great video, answered a lot of questions I had about grounding. Thanks.

  • @jamesaustin9848
    @jamesaustin9848 2 года назад

    I am soooooo sooooooooooooo sorry for your loss! You are in my prayers!

  • @JKnight89
    @JKnight89 2 года назад

    I will be 41 in Dec and last year over the summer I found my 37 yr old brother, passed away. Soo sad and we do have to move on. I believe he is in a better place as well as your mother. She's all better now, no more pain. I wish you and your family and her friends the best in these hard times.

  • @GM-vk8jw
    @GM-vk8jw 2 года назад +1

    Great video ❤️
    I’ve watched so many of the older members of my family pass away and only a few hours before my Mum’s time came she said I asked God to take me last night and he didn’t; will you ask for me…
    All I could say was I’ll see what I can do.
    A few hours later I got the call to go the hospital.
    I got there minutes too late because I couldn’t find a way in to the Ward at 04:45.
    She got her wish.
    Her pain ended and mine started.
    Even though a few years have passed since that day I still think I’ll call in at my Mum’s or I’ll get my Mum one of those.
    Life does go on but it doesn’t get any easier…
    It’s just that I get better at coping.
    I’m seen as the old man now.
    We just move up the ladder…
    Keep strong ❤️

    • @learnelectronics
      @learnelectronics  2 года назад +1

      I'm the old man too. And feel just like you.
      I was always buying my mom potato chips. She loved chips, so whenever I'd see something new I'd buy her a bag. Also I was at her house 3x a day to check on her and take care of anything she needed. It's going to be very hard not going there every day.

    • @1pcfred
      @1pcfred 2 года назад

      Even when you know it is coming it never seems to lessen the blow. You tell yourself the inevitable is approaching yet it does not help when the moment arrives. Least that's how it is for me. There's things that defy rationalization. Loss is certainly one of those things.

  • @gartmorn
    @gartmorn 2 года назад

    So sorry to hear your sad news Paul.
    I lost my mum this year and know how you're feeling! Take care my friend!

  • @gydo1942
    @gydo1942 2 года назад

    My condolences Paul.. Already rough times get even worse. Thank you so much for continuing to make these videos, they are a big help for beginners like me. May God be with you and your family.

  • @bconppp
    @bconppp 2 года назад +1

    Great to see you back on deck, it takes time, all the very best, God bless

  • @iot_enthusiast
    @iot_enthusiast 2 года назад +2

    Stay strong brother. May God be with you and family 🙏🙏

  • @Dostoevskie
    @Dostoevskie 2 года назад +1

    I love your way of explaining things. Thank you so much for sharing all these videos, they have helped me a ton with understanding electronics 😀

  • @sinjhguddu4974
    @sinjhguddu4974 2 года назад

    Please don't feel alone! We are with you and do share your loss. We are one family here.

  • @frankowalker4662
    @frankowalker4662 2 года назад

    I am so sorry for your loss. My thoughts are with you.

  • @srs26
    @srs26 2 года назад

    So sorry to hear about your mom. Lots of love from England!
    Simon

  • @vic2kmy
    @vic2kmy 2 года назад

    My condolences on your loss. May your mom rest in peace. Great video. 👍

  • @khuongathebounga4141
    @khuongathebounga4141 2 года назад

    I'm so sorry for your loss Paul. Sending my condolences to you and your family.

  • @Flyrip
    @Flyrip 2 года назад

    So sorry for your loss. Deepest condolences.

    • @learnelectronics
      @learnelectronics  2 года назад

      Yep, I will not make that mistake again. I'm lucky they still make those sockets.

  • @BrucesWorldofStuff
    @BrucesWorldofStuff 2 года назад

    My condolences Paul! I'm so sorry for your loss. She is better now.. Yes life goes on that is true. My mother has been gone 7 years and I still have days I forget she's in a better place and Diabetes is no longer a issue that took her life. Stay strong and do take time off if you need to, if you don't I understand that too...
    Thanks for the video on Grounds!
    Prayers Paul!
    LLAP

  • @Francois_L_7933
    @Francois_L_7933 2 года назад

    Sending you my most sincere sympathies.
    And many thanks for clarifying the subject. I'm often left scratching my head when a schematic simply uses ground as the common negative connection to the battery.

  • @dalenassar9152
    @dalenassar9152 26 дней назад

    I just paused your video at the start to say that I am so sorry for your loss.
    God Bless!
    --daLE

  • @billyonions9822
    @billyonions9822 2 года назад

    I'm so sorry for your loss. All my thoughts are with you. Take care and look after yourself. Peace.

  • @TheFilthy13
    @TheFilthy13 2 года назад

    My condolences brother. Much Light and Peace.

  • @jj74qformerlyjailbreak3
    @jj74qformerlyjailbreak3 2 года назад

    Your Videos Are Ground For Me In Stressful Times Paul.
    Thanks.

  • @brianwood5220
    @brianwood5220 2 года назад

    God bless you and your family Paul.It's good your Mum is finally at peace.

    • @learnelectronics
      @learnelectronics  2 года назад

      Brian, thank you. Yes no more pain and suffering. She is at peace. And I have faith we will be reunited.

  • @RobertWilliams-mk8pl
    @RobertWilliams-mk8pl 2 года назад

    Sorry for your loss. God bless

  • @Mumme666
    @Mumme666 2 года назад

    Sorry about your loss Paul. Thaught from Denmark. ❤

  • @charleskile3769
    @charleskile3769 2 года назад

    Hi Paul... sorry to hear about your mom. I 57 years old and also have CHF and an ICD, I lost my mom in 2000, I don't think i'm over it yet. Somehow you and your content make me feel less alone.
    Thank you for what you do. God bless

  • @databang
    @databang 2 года назад

    Hey big guy, sorry to hear of your tremendous loss, but I’m glad you shared it with your students and fellows. Peace.

  • @leegoodair4678
    @leegoodair4678 2 года назад

    Sorry for your loss Paul

  • @BurtReynoldsMetal
    @BurtReynoldsMetal 2 года назад

    Sending you positive energy your way man. Condolences.

  • @tglenn3121
    @tglenn3121 2 года назад

    My condolences. I'm sorry for your loss.

  • @aldizzle
    @aldizzle 2 года назад

    Thank you. You touched my heart by simply mentioning your mom passing. I have been there.

  • @opalprestonshirley1700
    @opalprestonshirley1700 2 года назад

    Good explanation of ground. Thanks, Paul.

  • @ice-nineengineering8703
    @ice-nineengineering8703 2 года назад

    Condolences sir, very sorry for you loss!!

  • @vinitsingh8962
    @vinitsingh8962 2 года назад

    Great informative video man.👍👍

  • @TrapShooter68
    @TrapShooter68 2 года назад

    Always a thumbs up. You have great stuff. Thanks and condolences

  • @tcpbox
    @tcpbox 2 года назад

    Paul i am Paulo and I know how you are feelling now tomorrow will complete 3 years my mom has passed away, and I miss her, be strong and remember her with love in your heart. My condolences...

  • @clintonhunter6821
    @clintonhunter6821 2 года назад

    Paul very sorry for your loss.

  • @bblod4896
    @bblod4896 2 года назад

    Perfect written definition of ground. What confused me for a long time was many CB radios have electrical (battery negative) ground and and it is separate from chassis (antenna) ground. One day, the light bulb went off. Apparently, years ago (and possible still today), Tractors had positive chassis ground, not the negative chassis ground we are use to with automobiles and that would cause a big issue when the radio was powered up. Some of the newer CB radios now tie the negative terminal to the chassis.
    Our family sends condolences to your family. May your mother watch over you and Blake.

    • @learnelectronics
      @learnelectronics  2 года назад +1

      Pretty sure Volkswagen beetles had a positive ground as well. At a friend in high school that had a beetle and she had to buy a special radio for it because you couldn't put a regular one in cuz of the ground. Thank you buddy

    • @bblod4896
      @bblod4896 2 года назад

      @@learnelectronics
      You're probably correct on that one.
      Take care, stay strong.

  • @jensschroder8214
    @jensschroder8214 2 года назад

    When we were building the audio distribution in the new church building, we soon had a ground problem. We had installed audio cables in all rooms to be able to send the sound flexibly from anywhere and to be able to fetch it from anywhere.
    The mixer and the amplifiers are connected to the audio ground via a power supply ground. But in the group room we also have a small amplifier where the audio ground is also connected to the power ground.
    So we had a nice ground lood. BRRRRRRRRR
    We solved the problem with sound transformers and DI boxes.
    So always only connect ground to earth at one point.

  • @theonewhowas7709
    @theonewhowas7709 2 года назад

    100% respect to you man.... for keeping your head up and moving forward...
    MAD RESPECT!!!!
    love your content!!!!!
    every video that i have watched of yours, i've always always watched yours all the way through to the end!!

  • @ouijim
    @ouijim 2 года назад +1

    Sincere condolences. My Mom and Dad are both long passed an unforgettable fact of life yet they are with me in memory for the rest of my days. . . They are in God's Hands. . .

  • @SodiumInteresting
    @SodiumInteresting 2 года назад

    good video and sorry for your loss

  • @JacobMaynard
    @JacobMaynard 2 года назад +1

    Love most of your videos. They are great to learn from. You also have fun experiments that don't always have to succeed on the first attempt. That's how it goes. However, the 7V difference of potential reference is probably complicated to understand for newbies. I recommend using a multiple point demonstration there. For example, AB and C have some potential difference. A and ground are 10V, where B to ground is 7V, and C to ground is 3V. This helps drive home the point that you can measure in a series circuit that voltage is additive to the equivalent supplied voltage. It also helps identify rails in circuits, which makes troubleshooting way easier.

    • @learnelectronics
      @learnelectronics  2 года назад +3

      Oh I agree with you 100%. It's very difficult to teach these concepts that would be taught over a period of days or even weeks in a classroom setting and distill them down to a 10 minute RUclips video.

  • @stevrgrs
    @stevrgrs Месяц назад

    Great explanation ! It helped a ton :)

  • @paulsharpe3794
    @paulsharpe3794 2 года назад

    Hi there I just wanted to say how sorry I am to hear about your loss. I work in the UK as an engineer working in the security sector and our sistoms may have several P, S, U's and thay have a common "0v"DC as part of the reference of the internal data. But every now and again you come to power part of the system down to then find out that someone has commented the 12v as well which means that the P, S, U, 's are back feading each other and it is still running. They have also connected the ground from different supply's to the building which can have several volts different between them. Fead from different sub stations. So you can be chasing folts for ages

  • @ArthurTugwell
    @ArthurTugwell 2 года назад

    Fantastically informative video mate. Big love from the U.K.

  • @John_Smith__
    @John_Smith__ 2 года назад

    My condolences and keep going forward. Thanks for your work.

  • @thecongo8505
    @thecongo8505 2 года назад

    Thanks Paul. Be very strong and courageous

  • @Skman22
    @Skman22 2 года назад

    Condolences, thank you for forging on.

  • @Time5757
    @Time5757 7 месяцев назад

    I'm very sad to hear about your mother, but she is in better world and thanks for this wonderful video sir.

  • @englishrupe01
    @englishrupe01 2 года назад

    Oh, Paul, i am so so sorry to hear your sad news. We are here for you....small comfort though that may be.

  • @TonyBarr99
    @TonyBarr99 2 года назад

    Paul, my deepest condolences for your loss. Thank you for posting her photo at the end of the video. I can tell she was a special woman. And as the Greeks say so eloquently: "may her memory be eternal." Great video as well! Thanks, Tony aka 20bar.

  • @bartdemeulmeester4662
    @bartdemeulmeester4662 2 года назад

    So sorry for your loss.

  • @abeleski
    @abeleski 2 года назад +1

    may she rest in peace. Health to you and your family. I always struggle with the ground. Thank you for the video

    • @1pcfred
      @1pcfred 2 года назад

      I made a stepper motor driver once and how the ground ran affected its function. Where one capacitor was I mean it was about this much difference > < I was looking at the circuit thinking nah that can't be why it isn't working. I cut that much wire out and made the capacitor that much closer and it fixed it. It was like a sixteenth of an inch. Was the most bizarre grounding problem I ever had. That circuit had two grounds in it, logic and load. Where that one decoupling capacitor was in relation to the logic ground as opposed to the load ground made it or broke it. In the end it was the same route just different distances. I'd tied the logic and load grounds together too closely. That decoupling cap had to be closer to the logical ground. Was just easier to wire how I'd done it initially. I didn't think it'd matter.

  • @AdamTheAd-vanc3d
    @AdamTheAd-vanc3d 2 года назад

    My deepest condolences to you. Love to yourself and the family.
    Keep up the outstanding content you share.

  • @alimoradi2323
    @alimoradi2323 2 года назад

    Sorry to hear about your loss. Be happy cause that's moms want for us.

  • @gregsdesigns3923
    @gregsdesigns3923 2 года назад

    Sorry to hear of the loss of your mother, prayers to you.

  • @nigeljohnson9820
    @nigeljohnson9820 2 года назад

    One of the jokers in the lab in which I once worked, kept a flower pot on his lab bench with a curly yellow green earth wire inserted into the pot soil, using a metal meat skewer to make the connection. When questioned by management about this contraption, he would always say that it was his bench earth, strangely they accepted this explanation.

  • @bengoodchild883
    @bengoodchild883 2 года назад

    Thank you Paul, you and your family have my thoughts. I hope you find your ground soon.

  • @bobfrediii2131
    @bobfrediii2131 2 года назад

    I am so sorry for your loss

  • @electronic7979
    @electronic7979 2 года назад +1

    Very helpful video

  • @juanhurtado2679
    @juanhurtado2679 2 года назад

    Great definition

  • @keithking1985
    @keithking1985 2 года назад

    very important lesson here, knowing which means which is important. Thank you Paul.. : ) & your Mum's At peace. she is always with you and you will see her again. just like ill see my mother and many more here. My Prayers are with you Paul..

  • @firmkillernate
    @firmkillernate 2 года назад +1

    Peace be with you. She may be gone from this world, but not from your heart.

    • @learnelectronics
      @learnelectronics  2 года назад +1

      You're absolutely right she will live on my heart forever

  • @Drifter69
    @Drifter69 2 года назад

    Sorry for your loss

  • @Soupie62
    @Soupie62 2 года назад

    Great introduction. Might I suggest you follow up with ground loops?
    You mentioned them in passing at the end, Im sure you could explain them in the same style.

  • @damnedjose
    @damnedjose 2 года назад

    my condolences.... thank you for your videos.

  • @Erik1sch
    @Erik1sch 2 года назад

    Sorry for your loss 😞

  • @andrewwilson6240
    @andrewwilson6240 2 года назад

    Neutral earthing and associated protection implications in 3 phase networks is another whole topic of its own

  • @Rueger12
    @Rueger12 2 года назад

    God bless you and give you peace brother

  • @bvds2007
    @bvds2007 2 года назад

    Sorry for your loss.

  • @davidt7317
    @davidt7317 2 года назад

    Sorry to hear your sad news Paul.

  • @okaro6595
    @okaro6595 4 месяца назад

    In the US system the fault current does not go to the ground but to the incoming neutral (the grounded conductor) and then to the transformer so it trips the breaker. A ground rod alone does not make an installation safe. Countries where that method is used use total differential protection (RCD/GFCI) for the house.

  • @warrenking1815
    @warrenking1815 2 года назад

    Paul, my condolences on the passing of your mother. Keep her in your heart and memory.

  • @faisal5370526
    @faisal5370526 2 года назад

    Good information sir

    • @faisal5370526
      @faisal5370526 2 года назад

      Well come 😜😜😜🤗🤗🤗

  • @WistrelChianti
    @WistrelChianti 2 года назад

    Couple of funny thoughts (but this wasn't the point of the video so this is just for fun) the LED is getting 47 microamps and the PNP might be flapping in the wind without being tied high when the NPN is off. Thanks for the video. As always really interesting stuff!

  • @davidmaruska1641
    @davidmaruska1641 2 года назад

    Sorry for you loss!

  • @MrDoneboy
    @MrDoneboy 2 года назад

    Sorry about your family's loss Paul. As my then dying Grandmother told me many years ago..."Death, is a part of life"!

  • @stevenichol693
    @stevenichol693 2 года назад

    Sincere condolences from the UK.

  • @RogerCillion
    @RogerCillion 2 года назад

    I just want to mention that chassis earth and the symbol used is obsolete since 20 years ago according to IEC