Thus directory contains information about some of Grug Huhler's electronics projects. See YouTube Channel: http://www.youtube.com/@electronics.tinker ./tayloe_mixer: https://youtu.be/UKtBHGlY9Kg adalm2000_connections.jpg (schematic of sorts) ./tayloe_receiver: https://youtu.be/hTzIiyURii8 receiver.jpg (schematic of sorts) ./tayloe_upconverter: https://youtu.be/Y2qJnh9LEHk breadboard_circuit.jpg quad_upconverter.asc (LTSpice model-- runs slowly) tr_path.jpg ./x9c103_speed: https://youtu.be/HC5zzTrXInQ digi_pot_test.ino (Arduino sketch) ./strange_led_blink: https://youtu.be/cAwbOCInDKU?si=pxm3Q6C_8n0aAkrE This Tang Nano 9K project demonstrates some clock-related Gowin hard IP clocks, using them to blink an LED. Note the project source and file names do not match the video. I did some cleaning up before uploading to github. ./raspi_mcp4131: https://youtu.be/KReZy8y35OM This video discusses how the MCP4131 digital potentiomer uses SPI in an unusual bidirectional way. It also shows how to use SPIDEV on a Raspberry Pi (model Zero tested) to command the MCP4131. ./tang_nano_mac_fpga: https://youtu.be/qTdrYL4ayPM https://youtu.be/pj_xLoxf1hY These videos are about doing arithmetic on the Tang Nano 9K with data stored in shift registers. The FPGA is commanded by software on a Raspberry Pi Zero (other models should work also). In the first video, there are two unidirectional data lines between the RPI and the FPGA. In the second, there is a single bidirectional data line. This repo is a cleaned up and expanded of the repo referenced in the original videos. Use this one.