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Firmware for the RF Signal Generator [0410619A.HEX] ATmega328P microcontroller firmware (HEX file) and BASIC source code for the AM/FM/CW Scanning HF/VHF RF Signal Generator (0410619A.HEX). Update: this new version (V14) suits both pulse-type and level-type rotary encoders. You can identify a pulse type encoder as the two internal switches are always open when the encoder is at rest, while a level-type encoder will have one or both switches closed in some rotational positions. If your encoder is a level-type, solder a 100kΩ resistor from pin 28 of IC1 to GND to enable correct operation. Cat No SC5057. Price: Free Files: ZL2PD_SigGen_AD9850_328_V14_PULSEandLEVEL (0410619A).zip (ZIP contains .hex and .bas files; 18.0KB) Related to: Project: An AM/FM/CW Scanning HF/VHF RF Signal Generator (June 2019 [print issue] [online issue]) Project: Building the RF Signal Generator (Part 2) (July 2019 [print issue] [online issue]) Other items relevant to these projects: AM/FM/CW Scanning HF/VHF RF Signal Generator PCB [04106191] ($15.00) Add to trolley ATmega328P programmed with the firmware for the RF Signal Generator [0410619A.HEX] (V14) ($10.00) Add to trolley Pulse-type rotary encoder with pushbutton and 18t spline shaft ($3.00) Add to trolley AM/FM/CW Scanning HF/VHF RF Signal Generator PCB pattern (PDF download) [05105191] (Free) Add to trolley AM/FM/CW Scanning HF/VHF RF Signal Generator panel artwork, cutting diagrams and STL files (downloads) (Free) Add to trolley