- [ ] Check for shorts
- [ ] Ground
- [ ] 3V3
- [ ] 5V
- [ ] 1V2
Power Circuitry
SCH2 and SCH3 (except for power headers while waiting for them)
-
[ ] Assemble Dual Buck Converter circuit
- [x] Solder LEDS (BOX 3- LINE ITEM 8)
- [x] Solder LED Resistors (BOX 3 & 1)
- [ ] Solder LM264 IC
- [x] Solder resistors
- [x] 31.6k B3L24
- [x] 10k B3L15
- [x] 4.99 B3L23
- [x] 5.76k B3L26
- [x] 0.025 B3L25
- [x] Solder Caps
- [x] 22uF B3L5
- [x] 1uF B3L3
- [x] Solder Inductors
-
[ ] Assemble eFuse circuit
- [ ] Solder NIS IC (B2L9)
- [ ] Solder Resistors
- [x] 1K (B3L19)
- [x] 5.6 (B3L20)
- [x] 14 (B3L21)
- [x] 36 (B3L22)
- [ ] Solder Caps
- [ ] 22uF (B3L5)
- [ ] 1uF (B3L3)
- [ ] Be careful of this
-
[ ] Test Power Circuit
- [ ] Powering 5V directly to the buck converter → correctly steps down to 3V3 and 1v2 on testpoints
- [ ] BIG ISSUE: Pins on eFuse → bypass that
- [ ] Supply 5V power supply to power headers (using tabletop power supply)
- [ ] Measure and validate 3V3 output with TP31 (RECORD DATA) → 3.31V
- [ ] Measure and validate 1V2 output with TP32 (RECORD DATA) → 1.25V
- [ ] Validate 3V3 Power LED
- [ ] Validate 5V Power LED
-
[ ] Assemble Current Sensor circuit
- [ ] Solder MAX9934 IC
- [x] Solder resistors
- [ ] Solder caps
- [ ] TODO: ADD VALIDATION FOR CURRENT SENSOR LATER
USB-UART Circuitry
SCH1, focus on getting power from USB
- [ ] Assemble USB-UART Converter
- [ ] Solder decoupling caps
- [ ] Solder UART VBUS voltage divider
- [x] Solder 5V RED LED
- [ ] Solder USB-C connector
- [ ] Solder ESD Protection TVS diodes
- [ ] Solder USB-UART Bridge IC + 1K Resistor
- [x] Solder RXT/TXT LEDs + resistors
- [ ] Test USB-UART Converter
- [ ] TODO: ADD VALIDATION FOR DATA LINES (after micro probably)
- [ ] Add power jumper to use USB 5V for power supply
- [ ] Measure and validate 3V3 output with TP31 (RECORD DATA)
- [ ] Measure and validate 1V2 output with TP32 (RECORD DATA)
MCU Minimal Testing Phase
Tests the minimal working requirements of the MCU (can it be programmed and turn on an LED)
- [ ] Solder RM46
- [ ] Solder Oscillator
- [ ] Solder I2C Pull-up resistors