12-5V Buck + ELRS RX: Test Plan
- Kenny Na
Owned by Kenny Na
Assembly Checks
Verify no connector pins look soldered together
Verify no pins on ESP32/SX1281 look shorted
Solder on XT60-M and XT60-F connectors
Solder on 2.54mm pitch header pins for 5V/PWM
Verify pin 1 on chips aligns with indicator
Completed assembly checks.
Power Testing
DMM
Make sure no power rails are shorted to ground or each other with DMM
From here on, power the device:
Verify the 5V output rail turns on (buck functionality)
Verify the internal 3.3V rail turns on (LDO functionality)
Slowly increase voltage (with low current limit, 100mA max) on buck input
Check for excessive current/power draw (ensuring no output load)
Optionally, measure potential when EN pin activates buck IC
Varies due to hysterisis, but ~5.2V
Probe the output net for voltage stability with DMM
Buck outputs 5V.
E-load
Perform load test on buck converter: use an e-load to saturate the 5V rail to 4A rated maximum.
Optionally, load the 12V passthrough XT60-Fs.
Oscilloscope
Load transient testing: Step the e-load and view the transient response from buck converter output.
Battery inrush test: simulate hot-plugging a battery on the input terminal and view transient voltage spike/oscillations.
Firmware Testing
Use USB to UART adapter/FTDI cable to flash the bootloader onto the stock ESP32-C3.
… more to be completed by EFS