>
> I did some work on this problem and eventually traced it to a loose connection. However, after fixing that problem the unit still would periodically blink red and then go back to blue. I measured the voltage after the diodes (with the engine running) and it was a steady 12.3 volts. I'm pretty sure either the unit or one of the diodes is just flakey and I'm going to buy/build another one to confirm my suspicions. Thanks for the suggestions and help.
>I'll post a final resolution for those that might want to know.
Bill. It sounds like you're making good progress.
If the voltage after the diodes is 12.3, then voltage
at battery should be about 13.5, IE, battery is being charged.
If things appear "flakey", it could be that your solder joints
for the diodes etc are not good quality.
(or any of the components could be flakey)
Mike
>
> ----- Original Message -----
> From: Michael Huckle
> To: Sport Aircraft
> Sent: Thursday, March 25, 2010 1:53 AM
> Subject: RE: Light-Sport Aircraft Yahoo group Maxpro Battery monitor
>
>
>
> Bill,
>
> The most likely reason for,
> "flashing red LED and the buzzer sounds (normally what the unit does if the voltage is way low)",
> would be,
> battery voltage low.
> Can you borrow a multi-meter and measure the voltage across battery?
> If it's more than 11, then measure the voltage on the two little wires going into this unit.
>
> Did you start the engine using the battery?
> If yes, did the battery sound strong?
>
> If you keep the battery charging (hopefully) for awhile, does the unit stop buzzing?
>
> Mike
>
>
>
>
> ------------------------------------------------------------------------------
> To: Sport_Aircraft@yahoogroups.com
> From: wrhobson@...
> Date: Wed, 24 Mar 2010 20:43:44 +0000
> Subject: Light-Sport Aircraft Yahoo group Maxpro Battery monitor
>
>
> I realize this is a long-shot but I thought it would be worth a try. I bought a little doo-dad to serve as a low battery/alternator failure indicator (a whopping $6.00). It's called a Maxpro 3S and someone on this forum suggested that I put two diodes in series in the circuit. The unit seems to work fine when the engine isn't running, but when I fire the engine up and kick on the alternator the unit goes to a flashing red LED and the buzzer sounds (normally what the unit does if the voltage is way low). I (of course) have lost the little paper that came with the gadget, but I'm wondering if maybe it does this because of an OVER-voltage situation. Does anybody happen to know anything about how these circuits are typically built? Thanks.
>
>
>
>
>
> ------------------------------------------------------------------------------
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