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        For Sale "3D" Ignition Drop Down Diode for A123's

#1 Jonathan Ott Oct 07, 2012 02:14 PM

"3D" Ignition Drop Down Diode for A123's
 
5 Attachment(s)
"3D" Ignition Drop Down Diode for A123's.

These are virtually the same as available from several mail order vendors. I just made a bunch of these up and will pass the savings to you!!!

For use with A123 batteries, these will drop the voltage to your ignition module by about 1.3vdc.

Please see the pics:

1. A set of diode rigs, ready to go!

2. My test battery (EP Buddy 2300 mAh LiFe)

3. Battery voltage (6.97vdc. It had already been running the cooling fan for a few minutes prior to this picture)

4. Voltage showing on my cooling fan (6.92vdc)

5. Voltage at the fan through the "3D" Drop Down Diode (5.37vdc (it was bouncing between 5.37 and 5.38vdc))

Approximately a 1.55vdc drop!

This little rig will give you about a 1.3 - 1.5vdc drop that could save your ignition module from dying from an over voltage situation (remember, your A123 will show over 7vdc directly off the charger...).

These go for close to $8, plus shipping from many on-line retailers. Get 'em from me for $6.50 each, with free shipping!!! Quanity discounts available (5+ units).

#2 philfun Oct 07, 2012 03:48 PM

voltage drop
 
What Amps the diode can take ?
Thanks

#3 Jonathan Ott Oct 07, 2012 04:45 PM

These are made with standard 1N4002 diodes (they have the "Motorla" 'M' on them) and from what data I can find on the web, the 1N4002 diodes are 1000v, 1A forward current, but can take 30A surge current.

RCExcel ignitions, for example, from what I've read, use only about 650mAh when running.

Jon

#4 philfun Oct 07, 2012 06:23 PM

Do you beleve 1 amp is enough?

#5 Jonathan Ott Oct 07, 2012 07:45 PM

There are two diodes in series on these rigs, for 2 amps. I guess I could have explained that up front. ;)

Jon

#6 igorp Oct 07, 2012 09:16 PM

series doesn't add on current, same current will pass through both of them.

#7 gregory.da Oct 07, 2012 10:22 PM

Quote:

Originally Posted by philfun (Post 22939390)
Do you beleve 1 amp is enough?

They work, I've been using this setup on 30cc DLE's for a few years now..... or you can spend $30 on a switching regulator.

#8 Jonathan Ott Oct 08, 2012 12:13 PM

Quote:

Originally Posted by igorp (Post 22940730)
series doesn't add on current, same current will pass through both of them.

Thanks. Either way, 1A continuous, 30A surge. They will work perfect for our applications.

Jon

#9 closetguy Oct 08, 2012 06:02 PM

i have been using four of these that i bought off John,with no problems at all.i use them for ignition off a123 battery.

#10 gregory.da Oct 09, 2012 08:59 AM

PM sent

#11 Jonathan Ott Oct 10, 2012 01:38 PM

Quote:

Originally Posted by gregory.da (Post 22952969)
PM sent

Got it. It'll go out tomorrow.

Jon

#12 Jonathan Ott Oct 13, 2012 10:05 AM

Bump

#13 Jonathan Ott Oct 16, 2012 07:37 AM

These are selling great. Get a couple now for your winter projects and those of you that are thinking about upgrading your batteries.

Only 20 left!

Jon

#14 babcobra1 Oct 29, 2012 05:25 PM

Hi Jon
I need 5 of these Please let me know Paypal info so I can send money...
Thanks Bruce Bresky

#15 Jonathan Ott Oct 30, 2012 04:00 PM

Bruce, I just sent you a PM.

Thanks!

Jon


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