Jack.Straw
Member
I've built this NiMH charger (with lots of help here, thanks!) and it seems to be working. However, I haven't tested very long because i'm worried about the heat. After a couple minutes of charging the heat sink gets so hot that it burns my finger after about 2 seconds. How hot is too hot? Do i need a larger heat sink? Here is a picture of what i'm using now:
**broken link removed**
Here are the details of the project:
Maxim MAX712 Charger IC: Specsheet w/ Schematics
Charging: 6 AA Rayovac Hybrid 2100mAhr NiMH batteries
Rate: C/2 - 1050mA
Power Source: **broken link removed**
Load: LM386 based practice amplifier - The Ruby Schematic
My perfboard design:
**broken link removed**
**broken link removed**
Here are the details of the project:
Maxim MAX712 Charger IC: Specsheet w/ Schematics
Charging: 6 AA Rayovac Hybrid 2100mAhr NiMH batteries
Rate: C/2 - 1050mA
Power Source: **broken link removed**
Load: LM386 based practice amplifier - The Ruby Schematic
My perfboard design:
**broken link removed**