Some Background I’ve been collecting calculators for a while, and very recently I’ve been obsessed with the Voyager series of RPN calculators designed and manufactured by HP in the 80s. While the series included several gems, like the HP 15C “Advanced Scientific Calculator”, and the HP 12C “Financial Calculator”, the most elusive model for me […]
I love DIY/soldering kits, and thanks to online marketplaces like eBay I’ve been able to purchase and assemble a number of them for the past few months. One of the last ones I got was a very basic but useful function/signal generator, whose only problem was that it required a power supply with +12V/+5V/-12V rails (it also arrived already assembled despite being […]
As a break from my regular activities I decided to spend a week designing and building something with parts and components I’ve purchased over the years but never had the chance to use in a project. This is the result: A sort of portable gaming device powered by a really old AVR microprocessor. I’ll try […]