I bought a USB desk lamp. It has a power switch + 2 switches to increase/decrease brightness. But these buttons are hard to press, very slow to operate, and even the darkest setting is still very bright.
I'd love to add a true dimmer switch, so I can quickly turn it on and set the brightness in...
I remember either Electronics Hobbyist or Electronic Experimenter's Handbook from the early 1980's featuring a light dimmer circuit named Dynadim. The circuit dims an incandescent light bulb with a preset delay using a slide potentiometer interfaced to a MOSFET ( dual-gate like a 40673?)...