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Coin battery to AC
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Coin battery to AC

by madisoncollins on Thu Aug 08, 2019 3:07 pm

I have a garage door remote control that is powered using a 2032 coin battery. I'd very much like to power it from AC. Would it be as simple as getting a 3 volt plug (https://www.adafruit.com/product/1448) and connecting it to the positive/negative terminals?
Or should I use the LM3671 (https://www.adafruit.com/product/2745)? If so, could you walk me through the process?
Thanks!!

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Re: Coin battery to AC

by adafruit_support_bill on Thu Aug 08, 2019 4:57 pm

There was a post a while back where someone tried to replace a coin cell in a key-fob type transmitter and it didn't work.

Turns out that the transmitter was designed to work on a lower voltage and depended on the fact that the internal resistance of the coin cell would cause a voltage to drop due to the current demands of the transmitter. I'd check the voltage across the battery terminals while it is transmitting to see how much it drops and try to replicate that.

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Please be positive and constructive with your questions and comments.