Hi Andy, Another very educational video, thankyou. I'm learning elec. by watching your videos, their excellent. Easy to follow along, and quite relaxing to watch. Keep up the good work. A pleasure for sure. Take care, C.
Hi, calculator in the video is a Texas Instruments TI-25 and it’s served me fantastically well and was in daily use for over 30 years. I love the exchange function that’s great when you have to divide one string of calculations above the line by a string of calculations below the line. All the best ... Andy
Very nice video. I actually made a standard for myself so that I always leave the battery connected to the load for 1 minute, because that will give you a more realistic value. Keep up the good work. :)
Hi that’s good, what I wanted to do was get folk to consider looking at things from a different point of view. With the price of batteries now it’s worth understanding them but probably more importantly if you can dump any rogue batteries that could shorten your videoing or picture taking time than that’s a good thing. Kind Regards ... Andy
Hi Dennis, yes, it was the best job I’ve ever had; I loved every minute of it. And bear in mind I’ve done some interesting jobs including management roles, directorships and company owner. The cinema was a 1,500 seater, Art Deco, faboulos! The world of cinema is of course all fantasy and it was my first job when I left school. Just think I got to show Goldfinger time after time, on the day we got Goldfinger my Chief sent me down into the Auditorium to watch the film, magic! Kind Regards ... Andy
Hi Andy great job,I use this method end it's working for me ,I have a rezistor 10W 1ohm end check my lipo packs (2s,3s,5s,6s) I have one question is better to check the full pack. ,or better individual cells.
Hi there, if you get a satisfactory answer from checking a bunch of cells then I guess that's OK. But if the answer is bad then you should check each cell individually as one bad cell will negatively influence the result and you wouldn't want to discard a whole bunch of batteries for the sake of one bad one. All the best . . . . Andy
hey andy, i need your opinion. I've built an active antenna circuit for one of my radios. the circuit as is runs off a 9v battery , im gonna box it up and run it off mains with a 12v transformer,regulatorr ,the whole bit. my ? is should i use a resistor or inductor in my pi filter, im worried about rf jumping on the mains. ty
Thanks, Andy... great, informative video. I see you’re recommending a 100 ohm resistor for these types of battery IR tests. What wattage would you recommend the resistor be?
If you want to reduce RF then an appropriate style/value RF inductor should be the most effective component. You’ll never really know if you have a RFI problem until you test the system and sometimes it can be easy to stop and another design can drive you nuts. If it worked OK with the battery you might find if there's a problem with the PSU (with a resistor) then a few turns of mains lead through a ferrite ring may be all you need. Keep it simple. Good luck. All the best .... Andy GWØJXM
Hi Andy, As always a very informative tutorial, I really appreciate them. The reason I wanted Aberporths Post Office Address was so I could mail you something without having to compromise your physical home address, I trust that a package would be delivered or able to be picked up at pharmacy P.O.. Take care, be good. See ya, C.
I haven’t found a commercial list of anticipated internal resistance’s, if someone knows of one maybe they’ll point me in the right direction. Kind Regards ... Andy
You know I nether froth about that but I guess it will. If you think of the two wires coming out of a black box there's no way of knowing what's in the box.regards . . . Andy
Hi Carl, I just hope that if ever they fit me up with a pacemaker or some sort of artificial brain or electronic kidney that I'll still be able to remember where to shove the batteries. All the best ... Andy
Hi Cass, I don’t know what you’ve done but you really shouldn’t send anything. If I know something is coming I can arrange a collection facility at the PO but it’s not something I want to encourage. What I’d say is, if you haven’t already sent whatever it is you were planning then pleases don’t put yourself to any expense or inconvenience. What I do on RUclips is done for my own satisfaction and to help others, and it’s given freely to anyone who’s interested. Kind Regards ... Andy
I have an HP 25 calculator. Must be 35 years old. Still works fine. Another excellent video. Thank You.
Hi Andy, Another very educational video, thankyou. I'm learning elec. by watching your videos, their excellent. Easy to follow along, and quite relaxing to watch. Keep up the good work. A pleasure for sure. Take care, C.
Never considered checking this thoroughly...I'll be checking my rechargeables also, thanks for sharing.
Joe
It's good to see someone using a decimal point rather than the idiocy of a full stop!
I used that calculator almost every day for other 30 years, it served me fantastically well.
All the best ... Andy
I've got the same calculator, about the same length of time. Still works & looks about the same :-)
thanks andy i had forgot about the ferrite ring option, they even make a snap over design as well. im glad i asked you. Peace to you
Hi, calculator in the video is a Texas Instruments TI-25 and it’s served me fantastically well and was in daily use for over 30 years. I love the exchange function that’s great when you have to divide one string of calculations above the line by a string of calculations below the line.
All the best ... Andy
Nice tip... quick and easy method. Nice multimeter by the way.
Really handy information there, thank you for taking the time to make the video.
Very nice video. I actually made a standard for myself so that I always leave the battery connected to the load for 1 minute, because that will give you a more realistic value. Keep up the good work. :)
I always was interested and been in some projector rooms indoors and outdoos
I see you were a projectionist.bet that was a fun job
thank you for the video. Its always easier to understand things when I got an Elmer showing me how simple it is.... 73
Hello Andy,
Another interesting video after a little break I look forward to more in when time allows
Regards
Ian VK2IJ.
Great video easy to understand....thank you
Hi that’s good, what I wanted to do was get folk to consider looking at things from a different point of view. With the price of batteries now it’s worth understanding them but probably more importantly if you can dump any rogue batteries that could shorten your videoing or picture taking time than that’s a good thing.
Kind Regards ... Andy
Hi Dennis, yes, it was the best job I’ve ever had; I loved every minute of it. And bear in mind I’ve done some interesting jobs including management roles, directorships and company owner. The cinema was a 1,500 seater, Art Deco, faboulos! The world of cinema is of course all fantasy and it was my first job when I left school. Just think I got to show Goldfinger time after time, on the day we got Goldfinger my Chief sent me down into the Auditorium to watch the film, magic!
Kind Regards ... Andy
thanks for this easy to follow presentation, i just learned something new today!
Thanks that was an easy way to calculate.
If you need assistance you'll need to call in Ben Dover! Great video.
I'm glad you find it useful.
Well done Andy
Great info Andy,,, Thanks m8.
Carl
Thanks Cass..
Regards ... Andy
very informative andy ty
Hi Andy great job,I use this method end it's working for me ,I have a rezistor 10W 1ohm end check my lipo packs (2s,3s,5s,6s) I have one question is better to check the full pack. ,or better individual cells.
Hi there, if you get a satisfactory answer from checking a bunch of cells then I guess that's OK. But if the answer is bad then you should check each cell individually as one bad cell will negatively influence the result and you wouldn't want to discard a whole bunch of batteries for the sake of one bad one.
All the best . . . . Andy
@@AndyDaviesByTheSea Tank you very much I appreciate you advise,so far it looks good i keep them under surveillance with this method.
Best regards.
hey andy, i need your opinion. I've built an active antenna circuit for one of my radios. the circuit as is runs off a 9v battery , im gonna box it up and run it off mains with a 12v transformer,regulatorr ,the whole bit. my ? is should i use a resistor or inductor in my pi filter, im worried about rf jumping on the mains. ty
Great information
Thank you
Thanks, Andy... great, informative video. I see you’re recommending a 100 ohm resistor for these types of battery IR tests. What wattage would you recommend the resistor be?
It wouldn't really matter because it's just for a few seconds or ten so you could use less watts resistance
Hi Andy, could you tell me what Wattage resistor to use with a 12v 2Ah sealed lead acid battery? I need to check the internal resistance
If you want to reduce RF then an appropriate style/value RF inductor should be the most effective component. You’ll never really know if you have a RFI problem until you test the system and sometimes it can be easy to stop and another design can drive you nuts.
If it worked OK with the battery you might find if there's a problem with the PSU (with a resistor) then a few turns of mains lead through a ferrite ring may be all you need.
Keep it simple.
Good luck.
All the best .... Andy
GWØJXM
Hi Andy, As always a very informative tutorial, I really appreciate them. The reason I wanted Aberporths Post Office Address was so I could mail you something without having to compromise your physical home address, I trust that a package would be delivered or able to be picked up at pharmacy P.O.. Take care, be good. See ya, C.
Sir plz tell me how to calculate the actual current draw by the aa batteries??
There are radioshacks in the UK?
I haven’t found a commercial list of anticipated internal resistance’s, if someone knows of one maybe they’ll point me in the right direction.
Kind Regards ... Andy
Thank you.
Will this work on lead acid batteries?
You know I nether froth about that but I guess it will. If you think of the two wires coming out of a black box there's no way of knowing what's in the box.regards . . . Andy
Hi Carl, I just hope that if ever they fit me up with a pacemaker or some sort of artificial brain or electronic kidney that I'll still be able to remember where to shove the batteries.
All the best ... Andy
Will this work for AA and AAA as well?
Yes it sure does.
Sorry about the delay.
All the best . . . Andy
Last time I checked on a data sheet for a pp3 battery I think their quoted internal resistance ~1.4 ohms when new
Hi Cass, I don’t know what you’ve done but you really shouldn’t send anything.
If I know something is coming I can arrange a collection facility at the PO but it’s not something I want to encourage.
What I’d say is, if you haven’t already sent whatever it is you were planning then pleases don’t put yourself to any expense or inconvenience. What I do on RUclips is done for my own satisfaction and to help others, and it’s given freely to anyone who’s interested.
Kind Regards ... Andy