This short article will describe the adapter board that is connected to analog data sources and that is converting the respective voltage data into suitable voltage levels for the ADC inputs PA0:PA4 at the microcontroller:
The following data will be converted and later shown on the display:
- User keys (Key1:Key3)
- TX power measurement
- PA temperature (Sensor: KTY81-210 switched against GND)
- Battery/Supply voltage
- AGC output (DC) from receiver => S-Meter
This article covers the remaining digital (or “analog to digital”) stuff, next on the agenda will be the receiver.
Vy 73 de Peter