The CSTN01 Circuit Sticker tone encoder generates 50 different subaudible tones. It is based on the Microchip PIC16F54 microcontroller. Two option jumpers are used to select which of the 50 tones to generate. The output level is set by adjusting a trim-pot. The tone encoder requires 7 VDC to 20 VDC and about 5 mA.
Firmware Hex Code for chip programmer
Typical Audio Spectrum
