Successfully built a basic EEG/ECG electrode pair @hakkavelin — got heartbeat readouts showing on an oscilloscope! Next up: building an amplifier, feeding into a computer via ADC, detecting brainwaves.
Had to repair my headphones yet again so went to @hakkavelin, started experimenting with #gurdy wheel speed measuring devices. Got a basic Vishay CNY70 reflective optical sensor circuit working, soldered into my PIC demo board for initial testing before I make a tiny package to go on the gurdy itself.
#tabdump (all PDFs unfortunately):
Achievement unlocked at #hakkavelin: compiled and burned a C program to a PIC 16F886, using main.c written by hand and more-or-less understood.
Last night’s @hakkavelin #gurdy mutilation repair work worked perfectly! I now have a rather nice sounding electro-acoustic hurdy gurdy.
Next steps: wire up the internal microphone, put a plate over the hole in the back, fit the raspberry pi and power supply.
OH “minimum viable hospitality” @hakkavelin
