Excellent idea Rich. Ordered a pack of diodes last week. They arrived today and I wired, soldered and used heat shrink tubing on mine with a left over 12 volt AC/DC adapter and a spare 12 volt cigarette lighter plug. Works great and thanks for making this video.
@blackericdenice It protects it by keeping the electricity flowing in one direction from the transformer into the car but not the reverse. Sort of like an electrical version of a checkvalve.
I just connected my cigarette lighter plug to a small 12 volt battery, ensuring correct polarity of the center and side electrodes. Plugged that in to the cigarette lighter on the car and changed the starter battery. No dorking around with transformers and diodes!
Sounds like a good idea I'm going to do this for mine. My 12 volt cigarette lighter is always hot. Been getting tired of losing my trip mileage, for all the battery wiring I've been doing
I understand that this is an old video, nevertheless there is an important question that was left unanswered : what is the purpose of the diode ?Personally, I see two purposes. Firstly, assuming the diode is installed properly, not reverse biased that is, the this will make sure that the current will flow from the transformer to the car's electric system and at the same time, it prevents the current from the car's battery to flow back in the transformer, which otherwise could be nasty.If the diode isn't installed properly, reverse biased in this case, then no current will be allowed to flow out from the transformer towards the car's electric system but current will flow from the car's battery towards the transformer. You then have to picture that the 12.6V of the car's battery will be lowered down to about 11.9V at the lighter outlet, because of the diodes voltage drop, then roughly 9V will drop because of the reverse polarity, leaving about 2.9V with the proper polarity at the outlet and potentially at other points in the car's electric system, which would lead to unwanted situations for sure.I don't know for sure if such scenario could have a negative impact on the electronic components of the car, but count me out to test it on my car. Nevertheless, I will try to simulate the scenario and see the outcome.Globally, in this actual case, the diode has a VERY IMPORTANT role to play !!!
Knew I had everything laying around to make one, finally went through the parts bin and made one today...now I just have to remember to use it next time I have to disconnect battery.
Why the diode? The output from the little power source is DC. Why need a half wave rectifier from a single diode? What size diode did you use? Thank you.
I like this, but it would be better if you put a LED in such a way that it lights up when the cigarette lighter thing is installed. That way you are sure of the connection. They aren't a particularly good connector.
Would keeping the key in accessory when disconnecting the battery with a memory savor damage anything? I want to use one of these for my car, but the cigarette lighter turns off with the key.
There can be caveats regarding the AC adapter you use. Current and voltage are directly proportionate, which is important on a plain unregulated AC adapter. That means a 12v adapter with a higher current (amps) rating than the current you're actually using results in a higher voltage. The computer, radio, etc, will all have protections, but I'd suggest using a lower milliamp rating just for saving settings. I wouldn't use accessories or you'll then drop the voltage. Or, use a regulated adapter.
The chances of doing this wrong and over-loading the transformer are too great. Getting a memory saver with a connector that goes to OBD II port and the other end to a 12 volt battery booster is highly recommended.
I have used this one on many vehicles with success. www.amazon.com/dp/B07KCN69LJ/ref=cm_sw_r_tw_dp_U_x_WI7OCb84M69KN [[ASIN:B07KCN69LJ OBD ll Connector 9 Volt Battery Auto Memory Keeper/Saver]]
Rich, You could have soldered the 9 volt battery end of the cable you cut to the cigarette adapter and connected a 9 volt battery and got the same results, correct? Seem this would be much safer then messing around with a 120 volt feed>\. funkro
Rich, I just spent about 2 hours replacing the coils on my 2005 Expedition. I had the battery disconnected during the process. Upon connecting the battery and then running the truck, I've noticed that it seems like it is idling too low, while in drive. Could something in the trucks memory gotten erased? My presets on my radio remained on the memory. If that is not the case for the idle, im going to be looking at a vacuu leak. Whats your take on this?
I have the memory saver that used a 12v battery Does this work on all modern cars? And what do I do if I have a car were the lighter only comes on in the on position?
@richpin06a Do you think it would be safe to do, or would you recommend against it? If not, do you know anything about the memory savers that plug into the OBD-II port?
Hi Rich, I tried this as per your instructions and it worked. However, when I disconnected the battery leads from the terminals I got a rapid clicking sound coming from the relay fuse box which I presumed must be the power from the cigar lighter was affecting one of the relays, probably the fuel injection relay. I used a 12v adaptor with 300mA and 1N4007 silicon rectifier diode rated at 1A and 1000v. I also had to turn on the ignition for the lighter socket to power up. Can you explain this and has anybody else experienced the same? I then tried it again using a 9v battery and the same diode with crocodile clips attached to the battery leads and that worked but this time I didn't get any reaction from the relays. I would appreciate any comments or observations.
lorus511 I have never used this system for the vehicles were you have to turn on the ignition to power the lighter.I use this system in this video ruclips.net/video/CWQXGPp7i0E/видео.html for that.
Gee you stumped on that one....lol Important Update: Jan 1 2013 there will be a new richpin channel for all future videos.Richpin06a channel will be solely for all the Saturn lovers out there.Should be a lot of fun so stay tuned.
Diode allows an electric current flow only in one direction, so car battery current won't pass to external power supply when both of them are connected for a moment.
I'm dumber than the usual bunny, but you didn't mention if you plug the transformer into a power supply. I assume that you did because I see the transformer connected? to an extension cord?
Excellent idea Rich. Ordered a pack of diodes last week. They arrived today and I wired, soldered and used heat shrink tubing on mine with a left over 12 volt AC/DC adapter and a spare 12 volt cigarette lighter plug. Works great and thanks for making this video.
@blackericdenice It protects it by keeping the electricity flowing in one direction from the transformer into the car but not the reverse. Sort of like an electrical version of a checkvalve.
Well I have to say this is a fine video for someone that wants to "roll their own" memory saver. However, I just bought one at WalMart for $5 dollars.
@lonemeno That was a very good catch seeing the clock did not go out when i removed the cable from the battery.
@doktor2007 The power outlet is connected to the same power source as the radio and computer.
I just connected my cigarette lighter plug to a small 12 volt battery, ensuring correct polarity of the center and side electrodes. Plugged that in to the cigarette lighter on the car and changed the starter battery. No dorking around with transformers and diodes!
Sounds like a good idea I'm going to do this for mine. My 12 volt cigarette lighter is always hot. Been getting tired of losing my trip mileage, for all the battery wiring I've been doing
You don't need an extra diode because the transformer output is also dc and it has diodes inside already
@Knaeckebrotsaege At 1:06 of the video there is a bubble that states DC output.
I understand that this is an old video, nevertheless there is an important question that was left unanswered : what is the purpose of the diode ?Personally, I see two purposes. Firstly, assuming the diode is installed properly, not reverse biased that is, the this will make sure that the current will flow from the transformer to the car's electric system and at the same time, it prevents the current from the car's battery to flow back in the transformer, which otherwise could be nasty.If the diode isn't installed properly, reverse biased in this case, then no current will be allowed to flow out from the transformer towards the car's electric system but current will flow from the car's battery towards the transformer. You then have to picture that the 12.6V of the car's battery will be lowered down to about 11.9V at the lighter outlet, because of the diodes voltage drop, then roughly 9V will drop because of the reverse polarity, leaving about 2.9V with the proper polarity at the outlet and potentially at other points in the car's electric system, which would lead to unwanted situations for sure.I don't know for sure if such scenario could have a negative impact on the electronic components of the car, but count me out to test it on my car. Nevertheless, I will try to simulate the scenario and see the outcome.Globally, in this actual case, the diode has a VERY IMPORTANT role to play !!!
That's NOT how a transformer works!!! No diode is needed at all since the transformer converts AC voltage into DC voltage!!!!
@blackericdenice Prevents the battery from damaging the transformer.
@99carnot Nothing wrong the computer will relearn it's fuel trim in time and reset it's I/M Monitors after two drive cycles.
@logyscott No... but that won't stop me from routing for them.
For those cars it might be best to use a memory saver connected to the obd 2 port.
@TRcustomengineering They do make a memory saver with a 9 volt battery.
yep, just used this one and it worked great.
www.ebay.com/itm/254142465525
@SpaceWolfPainter No.... not enough stored capacity.
@bbdano126 When you disconnect the battery there can be a slite driveability issue till the computer does its relearn.
Knew I had everything laying around to make one, finally went through the parts bin and made one today...now I just have to remember to use it next time I have to disconnect battery.
@NapoDEf You might need a 12V one the 9V one worked good on this car.
Why the diode? The output from the little power source is DC. Why need a half wave rectifier from a single diode? What size diode did you use? Thank you.
also the clock didnt go out @narox the diode is so the battery power don't blow up your transformer its a one way gate sorta speak
I like this, but it would be better if you put a LED in such a way that it lights up when the cigarette lighter thing is installed. That way you are sure of the connection. They aren't a particularly good connector.
@aaronac8 It would be best if you use it for changing out the battery only.
now is it true that some cars can set off an air bag. i worked at sears and we were not aloud to plug memory savers in some cars because of this.
Excellent vid, thank you, like the thought of a diode, essential
Glad you liked it
@RogerIyengarDotCom I have not tried it yet on a car like that.
Would keeping the key in accessory when disconnecting the battery with a memory savor damage anything? I want to use one of these for my car, but the cigarette lighter turns off with the key.
@narox it makes the electrical current can only run one way, in to the car.
There can be caveats regarding the AC adapter you use. Current and voltage are directly proportionate, which is important on a plain unregulated AC adapter. That means a 12v adapter with a higher current (amps) rating than the current you're actually using results in a higher voltage. The computer, radio, etc, will all have protections, but I'd suggest using a lower milliamp rating just for saving settings. I wouldn't use accessories or you'll then drop the voltage. Or, use a regulated adapter.
So a regular 9volt battery will work fine for this also?
@IIGrayfoxII Now why didn't i think of that.
The chances of doing this wrong and over-loading the transformer are too great.
Getting a memory saver with a connector that goes to OBD II port and the other end to a 12 volt battery booster is highly recommended.
I just picked up one and it is a great tool to have.ruclips.net/video/CWQXGPp7i0E/видео.html
ruclips.net/video/RBfS6NyAxjI/видео.html
I have used this one on many vehicles with success. www.amazon.com/dp/B07KCN69LJ/ref=cm_sw_r_tw_dp_U_x_WI7OCb84M69KN
[[ASIN:B07KCN69LJ OBD ll Connector 9 Volt Battery Auto Memory Keeper/Saver]]
So would that kind not work on lighters that are only hot when the key is in on position? I don't have a jump stater
what did you plug the transformer into - as you never said unless i missed something -malcolm
cool,what type of diodes i need ?
@99carnot The memory of your computer and radio will be deleted.
Hi Rich, thanks for your idea, it worked fine, thanks very much, bye
How about the current of the transformer? especially if you have to turn the key to the on position you might need 700mA or more.
Im looking for a permanent solution so i can use a car stereo at home using a PC power supply
He Rich, What kind of diod is this ?!,can right down the @ of it ...thanks for you video as always good job & keep it up
Rich,
You could have soldered the 9 volt battery end of the cable you cut to the cigarette adapter and connected a 9 volt battery and got the same results, correct? Seem this would be much safer then messing around with a 120 volt feed>\.
funkro
Rich, I just spent about 2 hours replacing the coils on my 2005 Expedition. I had the battery disconnected during the process. Upon connecting the battery and then running the truck, I've noticed that it seems like it is idling too low, while in drive. Could something in the trucks memory gotten erased? My presets on my radio remained on the memory. If that is not the case for the idle, im going to be looking at a vacuu leak. Whats your take on this?
I have the memory saver that used a 12v battery Does this work on all modern cars? And what do I do if I have a car were the lighter only comes on in the on position?
@richpin06a Do you think it would be safe to do, or would you recommend against it? If not, do you know anything about the memory savers that plug into the OBD-II port?
Use a 9v battery in a battery holder. Cheaper and works well.
Hi Rich, I tried this as per your instructions and it worked.
However, when I disconnected the battery leads from the terminals I got a rapid clicking sound coming from the relay fuse box which I presumed must be the power from the cigar lighter was affecting one of the relays, probably the fuel injection relay. I used a 12v adaptor with 300mA and 1N4007 silicon rectifier diode rated at 1A and 1000v. I also had to turn on the ignition for the lighter socket to power up.
Can you explain this and has anybody else experienced the same?
I then tried it again using a 9v battery and the same diode with crocodile clips attached to the battery leads and that worked but this time I didn't get any reaction from the relays.
I would appreciate any comments or observations.
lorus511 I have never used this system for the vehicles were you have to turn on the ignition to power the lighter.I use this system in this video ruclips.net/video/CWQXGPp7i0E/видео.html for that.
Is this memory saver safe to use whenever I disconnect my battery to work on my car? Can I short any circuits with this memory saver in use?
Gee you stumped on that one....lol
Important Update: Jan 1 2013 there will be a new richpin channel for all future videos.Richpin06a channel will be solely for all the Saturn lovers out there.Should be a lot of fun so stay tuned.
@spikefish1989 I have not heard this must investigate.
Thank you sir , great jop , you are very useful
What the diode do? Why it’s needed?
@richpin06a Goooo.......Denver Broncos
Thanks for sharing this.
Rich do you think the Pats will go all the way?
There is video on YT where a guy uses a little PP3 9volt battery and saves all the memory.
how do u come up with all these ideas rich?? very good
The Fray Heartbeat 7:31 : )
Is the transformer AC or DC output?
@Arnthorg You know i was thinking the same thing.
I'm no electronics wizard, so, what's the diode for ?
Thanks
Diode allows an electric current flow only in one direction, so car battery current won't pass to external power supply when both of them are connected for a moment.
I would have removed the case from the cig adaptor and soldered the dieode and the wires it is cleaner
I'm dumber than the usual bunny, but you didn't mention if you plug the transformer into a power supply. I assume that you did because I see the transformer connected? to an extension cord?
@richpin06a Where do u come up wit this stuff? Nicely done though =D
Is it fine start the engine and change the battery?
that causes the alternator to full field
I don't know what "full field" is, sounds like something in football. In your case, this would cause load dump - see: en.wikipedia.org/wiki/Load_dump
@hateercenor DC output
Wonder if you could jump start a car using this.
Genius!
@SpaceWolfPainter bill nye the science guy
Epic videos, epic-er accent.
WAO NICE THANKS
Iam sorry I meant 9v battery
@Knaeckebrotsaege At 1:06 of the video there is a bubble that states DC output.