Julian’s postbag: #51 – banggood special
Lovely items from Banggood: SKU292538 1200W 20A DC Converter Boost Step-up Power Supply Module IN 8-60V OUT 12-83V http://bit.ly/1SzhJYv SKU230069…
Playing with: 240-watt polycrystalline 60-cell solar panel
Kindly donated by Jonty, this 240W 60-cell solar panel has an open-circuit voltage of 36 Volts and a short-circuit current…
Playing with transistors: npn 2n3904 transistor experiment
I've been playing with electronics for 40 years, but there's still stuff to learn - even basic stuff about how…
Julian’s ardutorials: arduino as an isp
Turning a regular Arduino Uno into an ISP (In System Programmer). https://www.arduino.cc/en/Tutorial/ArduinoISP https://www.arduino.cc/en/Hacking/PinMapping168
How to pick a lock – plastic padlock and picks from banggood
This plastic padlock and 9-piece pick set from Banggood helps you learn how to pick a lock. http://bit.ly/1X4enxR - Transparent…
Dubious business idea: leds, resistors and 12v car electrics
Connecting simple LED/resistor circuits to the 12-volt electrical system in a vehicle should be straightforward, but it's actually fraught with…
Retro electronics: z80 microprocessor serial data transmitter
Probably my biggest retro electronics project - a Z80 microprocessor based lighting system. In this video I scope the serial…
Fun for 1: poundshop vhf fm transmitter receiver set
A bit of a steal from the pound shop - a transmitter and receiver set operating on the FM 88…
Autopsy: faulty pwm5 solar charge controller
Moisture found inside one of my PWM5 solar charge controllers was stopping it working.
Retro electronics: magazine project – national lottery predictor
20-year old electronics magazine project. This is a device I created and had published in Everyday Practical Electronics magazine. It…