Have an auto darkening welding hood. It comes with an internal CR2032 battery, which will eventually go flat from just sitting around. Happened twice. The first time it happened I forced the lens assembly open to gain access to the PCB where the original 2032 was attached. Finally got it disconnected and wired up a new 2032 in a holder to the board. It worked. The holder was then glued to the welding hood. As before, the battery went flat. When I pulled the battery out of the holder the holder came loose from the hood. Of course I put another 2032 in and it's working, but I've decided to prevent another battery from going dead I want to put a switch on the hood.
Here's what I'm thinking: A SPDT slide switch to turn the darkening lens on and off. When I switch it ON I would like an LED to come on momentarily then extinguish. Timeframe is not critical. Anywhere from half a second to five seconds (not firm on that long, but long enough to observe that it has switched ON. THEN when I switch it OFF I'd like a similar situation where a second, different color LED lights up momentarily, then extinguishes. This is the circuit I've come up with. Your critique is appreciated.
CR2450 Data Sheet Here:
Here's what I'm thinking: A SPDT slide switch to turn the darkening lens on and off. When I switch it ON I would like an LED to come on momentarily then extinguish. Timeframe is not critical. Anywhere from half a second to five seconds (not firm on that long, but long enough to observe that it has switched ON. THEN when I switch it OFF I'd like a similar situation where a second, different color LED lights up momentarily, then extinguishes. This is the circuit I've come up with. Your critique is appreciated.
CR2450 Data Sheet Here:
Last edited: