I've enjoyed the wild bees this summer. One of the highlights of the summer was coming upon a nectar and pollen feast these black bees were having in a gentle winding ravine behind the Las Madres Pueblo on my dad's property.
Sunday, September 07, 2025
Sunday, August 10, 2025
VFD Filament Driver Circuit
Don't give up! I spent the last 3 years troubleshooting this circuit with an LM4871 chip with the goal of supplying a low voltage alternating square wave current across the filament of vacuum fluorescent displays. Spoiler alert: it was the addition of a single 10Ω resistor to lower the voltage from ~5V down to ~3.3V.
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