Arduino thrift tutorial – introduction to cheap chinese clones
An Arduino for £2.50? Not the genuine article of course, but a cheap Chinese clone selling on eBay. Here I…
Review: 3a 40v digital buck dc/dc converter – it’s more like a bench psu!
This digitally controlled buck converter is so stacked with features, it's more like a miniature bench power supply. Input: 5V…
Practical mosfet tutorial #3 – p channel and the mobility of holes
P Channel MOSFETs neatly solve the problem of not wanting to break up the common ground line. But they have…
Practical mosfet tutorial #2 – n channel, low side and the body diode
N Channel MOSFETs need a high gate voltage to switch them on.
Practical mosfet tutorial #1 – introduction and scope
A practical look at MOSFETs and how to use them
Review: sepic buck boost dc/dc converter – steps voltage up or down
The basic buck boost topology produces an inverted output, but SEPIC (Single-Ended Primary-Inductor Converter) solves that problem maintaining polarity through…
Crazy high speed 12v 300ma fans to cool 100w led
Found these bonkers fast fans on a power supply which was about to hit the skip. 12 Volts, 3.6 Watts.…
Buck converter dc/dc psu has voltmeter and ammeter and a bug!
A really compact buck converter with constant current control and voltage and current digital LED displays. It works well, but…
Arduino mppt solar charge controller #15 – changes coming
After working on precision control of the Arduino PWM frequency and my DCOI opto-isolator MOSFET driver, the MPPT controller will…
Dual complementary opto-isolator dcoi high side mosfet driver #3
The PC817C opto-isolators have fairly slow rise and fall times, but they operate in this circuit very much as the…