Let’s build a buck converter
Building the buck converter circuit on Wikipedia. https://en.wikipedia.org/wiki/Buck_converter Arduino PWM Experiments - Muppet 2 Project https://youtu.be/8RpVaUXgD0U Arduino PWM Inversion Issue…
Julian’s postbag plus: #105 – bluetooth supercapacitor speaker
Massive thanks to all my Patreon supporters without whom Postbag would be a feeble affair. https://www.patreon.com/julian256 Adam Welch's YouTube Channel:…
Test stream nexus4 phone 3g low bandwidth
Maybe one day I'll feel like streaming live from the middle of a desert!
Charging supercapacitors from a mains power supply
Thoughts about charging the supercapacitors in my Bluetooth speaker from a mains power pack. A high charge current is fine…
Amazing 72 science workshop gender neutrality
Bought this amazing science workshop for £5 from my local charity shop. Some of the component markings and descriptions are…
Playing with: the arduino secret voltmeter
Rather long, slightly rambly play with the Arduino Secret Voltmeter code. Does this provide enough resolution to measure lithium cells…
Julian’s postbag: #104 – resistors, capacitors stuff
Big thanks to Patreon supporters who help make Postbag videos so exciting. Patrons got to see this video 3 days…
Arduino ammeter with oled converted to wattmeter
Modifications to my Arduino Pro Mini INA219 Ammeter with OLED display, to turn it into a Wattmeter https://github.com/olikraus/u8g2/wiki/u8g2reference#print https://www.arduino.cc/en/Serial/Print
Julian’s postbag plus: #103 – supercapacitor module updates
Big thanks to Patreon supporters who make Postbag videos possible - Patrons got to see this video 2 days before…
8-bit breadboard computer – program counter replacement
Inspired by Jeff Laughton's simple computer, I've removed the program counter and replaced it with a latch. Programming is now…