It is a commonly known problem that the Raspberry Pi cannot provide enough power for most USB wi-fi adapters. This can be solved with the use of a powered hub, however I have plans to integrate the Raspberry Pi into other devices; due to space constraints I decided that it would be better to convert a dongle to draw power separately to its data connection, also taking the opportunity to reduce the distance that it projects past the end of the board. Continue reading →
I recently bought a new camera; it’s a Canon Powershot A800. Although it’s only a basic compact camera, I specifically chose one that can run CHDK; this is a replacement firmware that allows access to just about every feature imaginable. One thing I wanted to try was to take regular shots over the course of a night so that I could combine them to create a photo of star trails. I quickly realised that powering the camera with batteries limited shooting to a couple of hours and the cost of batteries was going to start mounting up. With canon wanting about £50 for an official mains adaptor it was time to make my own. This is what I came up with: Continue reading →
It’s time for the first post filed under ill advised experiments. Just in case you’d not got the hint from the name, don’t try this unless you know what you’re doing; one small slip and the only silver lining will be the cut-price cremation you’ll get for half doing the job yourself.
I’ve spent the last week building a 10kV DC power supply capable of about 100mA. In the main part it is composed of a microwave oven transformer(MOT), 4 microwave oven diodes and 60 camera flash capacitors. Continue reading →