A short while ago I ordered some stuff from China. The site offered free delivery via DHL. Cool! I was later contacted by the seller to say that I lived in a ‘remote area’ – the DHL delivery cost would be double. What. The. Heck? I live within the municipal boundaries of a mainland city with about half a million inhabitants in Western Europe. Not Afghanistan. This week I heard the same story from a colleague trying to send me an urgent parcel from London via DHL. OK, that’s it, GIS project o-clock! Continue reading “DHL ‘Remote Areas’ – A GIS Project”
Let’s start with the disclaimer. What follows is a Bad Idea, you could get blinded, burned, electrocuted or have your house burn down. This is not an exhaustive list. Really, I can’t recommend you try this yourself. The upside is a potential big saving in rechargeable batteries that you’d normally toss in the recycling. Continue reading “Capacitive Battery Charger”
I’m building a cluster using Raspberry Pi derivative boards (Banana Pi). Jeff Geerling gave me the idea to make a little PCB with RGB LED and also a 5.5mm DC barrel-style power connector. Continue reading “Power Connector Adaptor for Raspberry Pi With RGB LED”
Here are a few notes on working with the uber-cheap ESP-01 WiFi microcontroller module with Ubuntu.
Continue reading “ESP8266 ESP-01 Module With Ubuntu”
This gadget steps up the game from leaving a light on at home when you’re out. Place it near a window to make it look like somebody’s at home watching TV.
For fun I made a dedicated geocache toy from an Arduino, GPS receiver and electronic compass modules and neopixels (RGB LEDs).
Continue reading “Arduino-Based Geocache Finder Toy”
DigiSpark is one of the cutest Arduino-related widgets around. It’s about the size of a postage stamp, plugs straight into your USB port and will probably cover most of your microcontroller project needs. The problem is that it doesn’t seem to play nice, out-of-the-box with 64-bit Ubuntu Linux. Continue reading “DigiSpark With 64-bit Ubuntu”
This is just a quick note to help those who might have trouble interpreting the instructions from Rigol for their awesome DP832 Programmable Power Supply Unit in order to get a ramp voltage. Continue reading “Programming Ramp Output on Rigol DP832”
I bought a €40 “Anbere” brand IP camera from eBay to find that it can only be used to feed the supplied Microsoft Windows application. I need it to perform the simple task of serving a JPG through its web interface. This left me with two options: bin it or reverse engineer this shonky POS. I chose option 2. Continue reading “Hacking Cheap eBay IP Camera”
10 years ago I bought a radio for my workshop. The criteria were: FM, cheap and mains-powered. I forgot to add the criterion: works. The radio was really bad at tuning – be that finding a station or keeping tuned to it. So I decided to gut it and put my own circuit inside. Continue reading “Arduino FM Radio”