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Old Oct 07, 2012, 02:14 PM
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United States, TX, Killeen
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For Sale
"3D" Ignition Drop Down Diode for A123'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).
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Old Oct 07, 2012, 03:48 PM
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Windsor, Canada
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voltage drop

What Amps the diode can take ?
Thanks
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Old Oct 07, 2012, 04:45 PM
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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
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Last edited by Jonathan Ott; Oct 07, 2012 at 05:21 PM. Reason: spelling
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Old Oct 07, 2012, 06:23 PM
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Do you beleve 1 amp is enough?
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Old Oct 07, 2012, 07:45 PM
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United States, TX, Killeen
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There are two diodes in series on these rigs, for 2 amps. I guess I could have explained that up front.

Jon
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Old Oct 07, 2012, 09:16 PM
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series doesn't add on current, same current will pass through both of them.
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Old Oct 07, 2012, 10:22 PM
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Quote:
Originally Posted by philfun View Post
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.
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Old Oct 08, 2012, 12:13 PM
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Quote:
Originally Posted by igorp View Post
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
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Old Oct 08, 2012, 06:02 PM
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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.
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Old Oct 09, 2012, 08:59 AM
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PM sent
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Old Oct 10, 2012, 01:38 PM
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Quote:
Originally Posted by gregory.da View Post
PM sent
Got it. It'll go out tomorrow.

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Old Oct 13, 2012, 10:05 AM
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Bump
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Old Oct 16, 2012, 07:37 AM
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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
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Old Oct 29, 2012, 05:25 PM
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Hi Jon
I need 5 of these Please let me know Paypal info so I can send money...
Thanks Bruce Bresky
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Old Oct 30, 2012, 04:00 PM
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Bruce, I just sent you a PM.

Thanks!

Jon
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