Prototype of a FKS audio band modem with 3x CD4046 PLL ICs:
It is a complete full duplex RX/TX module with TTL input (its twin will soon arrive).
- Maximum bitrate: 80- 100 bit/s
- Unmodulated carrier: 1800Hz
- Modulated carrier: 2100Hz
Schematics are coming. (most of the work is based upon application notes and examples found on the datasheets)
diglo sei un mito continua cosi :)