# PWR - Power Supply

## Duties

- Provide +5v power to the computer
- Provide charging current for the Ni-Cd battery
- LED outputs for Power on, Battery Present, Charging, Charge complete

## Parts

- LM2576 (TI?, 3A?) [lm2576hv.pdf](https://wiki.trevorsacks.com/attachments/1) 
- ATTiny84 Ni-Cd Monitor [ATtiny24A-44A-84A-DataSheet-DS40002269A.pdf](https://wiki.trevorsacks.com/attachments/2)
- Based on Freescale MC68HC908QY4A Example [AN2679.pdf](https://wiki.trevorsacks.com/attachments/3) [AN3392.pdf](https://wiki.trevorsacks.com/attachments/4)