Nikon D100 aperture control unit repair

A couple of months ago I managed to find a used DSLR body for a very good price at a local flea market. I had been thinking of getting a proper DSLR for some time now (so far I’ve been using a “bridge” camera, the Fujifilm S9500), so for only £30 it was worth theContinue reading “Nikon D100 aperture control unit repair”

Using the DMA controller on STM32F4

A little while ago I got one of the fairly common “Nokia 5110”  LCD modules, a 84×48 b/w graphic LCD screen, thinking it would be handy to have in current or future projects. One of the things I especially like about this module is that it is using a serial protocol (SPI) to send dataContinue reading “Using the DMA controller on STM32F4”

STM32F4-Discovery MIDI input and basic synthesis

After the flurry of activities  in recent weeks on a previous post (thanks guys!) I finally went back and worked on the synth project some more. Some time ago I had already created a simple MIDI input and output circuit on a stripboard that the Discovery board could sit on. This would allow me to play notes orContinue reading “STM32F4-Discovery MIDI input and basic synthesis”

Identifying the controller chip on an LCD module

I recently got a cheap 20×4 LCD module on ebay and started playing around with it this weekend. Of course, given that I paid less than 5 pounds for it (incl. shipping from China) it came with no documentation or other information, but I hadn’t expected any. Since most LCD modules use the same protocolContinue reading “Identifying the controller chip on an LCD module”

Configuring the STM32F4-Discovery for audio

What made the STM32F4-Discovery board so attractive for me was the fact that it comes with a nice on-board Audio-DAC with integrated amplifier, the Cirrus Logic CS43L22. However, getting the combination of STM32F4 and CS43L22 to produce any sound is anything but trivial for someone just starting out with ARM microcontroller development (like me). AfterContinue reading “Configuring the STM32F4-Discovery for audio”

Hello STM32F4-Discovery

One way in which it’s easy to tell that I’m still relatively new to the whole electronics and microcontroller hobby is by the amount of new developments in this area I tend to miss until much later. One of those is the release of the STM32F4-Discovery evaluation boards from ST Microelectronics. While I was awareContinue reading “Hello STM32F4-Discovery”

VCR capstan control with ATmega328P

I like taking stuff apart, especially stuff with electronics in them, so when I saw an old VCR next to a trash bin in the alley behind our house, I had to take it in. There are obviously quite a few interesting bits inside a VCR, both mechanical and electronic. One of the things IContinue reading “VCR capstan control with ATmega328P”

Acorn RISC Machines infomercial

This was posted on Hack A Day today, and it seems an appropriate first post for this blog. It clearly captures one of my interests, namely digital processor technology (and a little bit of their history). Today ARM (now standing for Advanced RISC Machines) processors can be found in huge variety of different products, suchContinue reading “Acorn RISC Machines infomercial”

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