ATB : APRS TELEMETRY BOX

ARDUINO NANO & SENSORS
POWER SUPPLY
TEMPERATURE + HUMIDITY (DHT11)

AX.25 MODEM

https://unsigned.io/micromodem-diy/

SENSORS

4~20 mA CURRENT LOOP

TILT

POWER

30~7VDC in → 5VDC out DC-DC step-down converter