koalo's blog

There is already a large number of touchscreen solutions for the Raspberry Pi. I present yet another one. The special feature of this soluti...

The Raspberry Pi contains several I²C interfaces for accessing peripherals such as sensors, DA-converters or EEPROMs. Two interfaces are a...

A common problem with I²C is level shifting. For example the Raspberry Pi has a 3.3 V I²C interface. Connecting a 5 V I²C interface will b...

You might know, that the audio capabilities of the Raspberry Pi are not very sophisticated. There is no special audio hardware, because this...

I was tired of calculating the same thing over and over again. Therefore, I build this little tool for calculating the Raspberry Pi PCM/PWM ...

It was pretty straightforward to connect the touchscreen of  my display  to the Raspberry Pi. After plugging in the USB cable, the touchscre...

A small device calls for a small screen (or no screen at all). Luckily, I remembered that I bought a 8" TFT some years ago. I never use...