Amir Kazemi

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Using ATtiny24's capable ADC, this probe can measure voltages from 1mV to 20V and currents from ~1mA to 2Amps with reasonable accuracy.
Precision DIY voltage-current meter
466
Simultaneous 5V and 3.3V output, filtered and protected.
A tiny, breadboardable USB power supply
175
A simple, cheap short circuit protector, controllable either manually or using a microcontroller.
Resettable E-Fuse
795
A tiny dimmer with corrected output for resistive loads. Controlled with 3 keys and showing current value on 8 tiny colored LEDs.
ATtiny13-Based, Key-Controlled Simple Dimmer
1.8K
The well known USBasp programmer, with PCB redesigned to fit better on a breadboard, switches instead of jumpers, and an Arduino ISP header.
Breadboard Friendly USBASP
709
Unlike many simple dimmers, this dimmer dims a resistive load based on the delievered power, not just a simple fraction of delay.
Tiny Isolated Dimmer with Linearly Corrected Output
955