my recent reads..

LEAP#233 Hi-side PWM Controller

This circuit cobines a variable-duty cycle PWM generator with a high-side p-channel MOSFET driver circuit, making it suitable for controlling loads up to 15V/23A. As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub hero_image


read more and comment..

LEAP#232 LED Dimmer PWM

In LEAP#231 I claimed current control was better than PWM especially for flicker-free low light levels. But is that true? In this project I test a simple 555 Timer-based PWM dimmer for comparison’s sake. As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub hero_image


read more and comment..

LEAP#231 LED Dimmer (current regulator)

I was looking at some alternatives for dimming a 12V LED strip. This circuit is by Jim Keith at electroschematics. Rather than using PWM, this circuit controls the current and provides better flicker-free lighting even when dimmed. Very nice! hero_image As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub


read more and comment..

LEAP#230 Minimal LC Oscillator

I borrowed this idea and circuit design from stoneslice’s 1MHz Oscillator video. I tested a range of components across a range of frequencies from 1.5MHz to 2.9MHz. As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub hero_image


read more and comment..