Investigation: two similar dual display digital buck psus
How similar are these two dual-display digitally controlled DC/DC power supplies? Are they manufactured in the same factory? Were they…
Playing with: pic12f675 microcontroller demo pcb
I saw this $10 Microchip PIC demo board on eBay and thought it would be a good basis for some…
Playing with: magnetic field viewing film
Using a piece of magnetic field viewing film to check the pole orientation of various magnets. Also, what happened to…
Soldering wires to neodymium magnets
Heat from the soldering iron did seem to affect the magnetisation - possibly moving it around - possibly inverting it…
Tech talk: 5v 5a synchronous rectification buck converter
A technical talk about this 5 volt regulator. It's a high efficiency high current synchronous rectification DC/DC buck converter with…
Mad idea: high voltage dc power transmission
Using a boost converter, a long piece of thin wire and a switched mode power supply to carry DC current…
Julian’s postbag: #70 – ten items in ten minutes well almost
My attempt to open ten items in ten minutes was an abject failure. The eBay items: Qi Wireless Fast Charger…
Dissection: poundland frog
Faulty Poundland frog repaired by removing a solder blob from the PCB. Also, some tests to see if different voltages…
Review test: lensun 100w semi-flexible solar panel
http://www.lensunsolar.com/Flexible-solar-panel/Lensun-100W-12V-Flexible-Solar-Panel,Sunpower-Back-Contact-Solar-Cell-for-12V-Battery-charge-motorhome,boats
First look: dps3012 cc cv buck converter with colour lcd
Programmable Constant Voltage Current Step-down Control Power Supply Module I9W6 http://www.ebay.com/itm/-/282101303216