auriuman78
- Oct 11, 2012
- 6
- Joined
- Oct 11, 2012
- Messages
- 6
Hello world!
I've currently got a tube headphone amplifier that I built using a 12au7 tube. It's powered by a 12v SLA battery / linear external 12.6v dc supply with a rectifier valve to check the battery when on external. The SLA battery is not performing to what I'd hoped however. I was going to upgrade it to a Li-Ion 11.1v battery which would work better with the rectifier valve anyway due to lower voltage. My current dilemma is how to incorporate the charging circuit into my board design so I don't have to disassemble it to charge the battery every time it dies. SLA is easy. Li-Ion is a bit more sensitive from what I've seen since they are constant voltage with controlled sensed current. I work with those circuits daily but I don't know much about designing one. I've tried searching but most of the data I've found on charging circuit design does not include how to add such a circuit to an existing design.
I would love tips, experience and links to design documentation on this topic. I do want to understand the technical details behind the design and not just grab any old circuit design and integrate it into my amp. Thanks in advance!
I've currently got a tube headphone amplifier that I built using a 12au7 tube. It's powered by a 12v SLA battery / linear external 12.6v dc supply with a rectifier valve to check the battery when on external. The SLA battery is not performing to what I'd hoped however. I was going to upgrade it to a Li-Ion 11.1v battery which would work better with the rectifier valve anyway due to lower voltage. My current dilemma is how to incorporate the charging circuit into my board design so I don't have to disassemble it to charge the battery every time it dies. SLA is easy. Li-Ion is a bit more sensitive from what I've seen since they are constant voltage with controlled sensed current. I work with those circuits daily but I don't know much about designing one. I've tried searching but most of the data I've found on charging circuit design does not include how to add such a circuit to an existing design.
I would love tips, experience and links to design documentation on this topic. I do want to understand the technical details behind the design and not just grab any old circuit design and integrate it into my amp. Thanks in advance!