Arduino PWM Output Filter Circuit – Part 2

I've been using my solderless breadboard version of my Arduino PWM Output Filter Circuit quite a lot so thought it might be useful to commit it to protoboard and build it onto a simple shield. Warning! I strongly recommend using old or second hand equipment for your experiments. I am not responsible for any damage to … Continue reading Arduino PWM Output Filter Circuit – Part 2 →

Pico MIDI (H)Arp

Ever since looking at the MIDI Arp, which creates MIDI music based on the network packets travelling over an Ethernet link, I've wanted to do something related with Wi-Fi. This is my first try. https://youtu.be/aKuAEYryp6c Warning! I strongly recommend using old or second hand equipment for your experiments. I am not responsible for any damage … Continue reading Pico MIDI (H)Arp →

Arduino PWM Output Filter Circuit

There have been a number of occasions now where I've added a low-pass filter and voltage divider to my Arduino-based PWM outputs so I thought it was worth pulling that together into a single post to make it easy to refer to elsewhere. This is that post. There is nothing new here, it is just … Continue reading Arduino PWM Output Filter Circuit →

Toy Keyboard USB Matrix Decode with the Pi Pico – Part 2

Having added USB MIDI to my "Toy Keyboard" - I wanted the option to choose either USB or serial MIDI as the output. This returns to the Toy Keyboard USB Matrix Decode with the Pi Pico project to add a serial port option. Warning! I strongly recommend using old or second hand equipment for your experiments. … Continue reading Toy Keyboard USB Matrix Decode with the Pi Pico – Part 2 →

Toy Keyboard USB Matrix Decode with the Pi Pico

I never really got back to looking at my "Toy Keyboard" - I wanted to do the same as the Vintage Phone - create a USB MIDI version with Circuitpython. Well now I have. Here is the result. https://youtu.be/VNmp3-mwysI Warning! I strongly recommend using old or second hand equipment for your experiments. I am not … Continue reading Toy Keyboard USB Matrix Decode with the Pi Pico →

Universal Synthesizer Panel – Introduction

I have a number of "off the shelf" synthesizer programs and sketches kicking around that I wanted a way to actually be able to do some proper "musical" playing with them. Having them put together on breadboard and stripboard is all very well, but sometimes I want to be able just to load up the … Continue reading Universal Synthesizer Panel – Introduction →

Vertical Modular Synthesizer “CD Rack Format”

I'm planning on building a series of MIDI synthesizer modules that will have a pretty simple means of hooking them together, but want something to house them. I also have a couple of IKEA CD racks kicking around that haven't been required for a while, and I also don't want to take up large chunks … Continue reading Vertical Modular Synthesizer “CD Rack Format” →

Toy Keyboard Matrix Decode with the Pi Pico

I'm always on the look out for discarded music keyboards that I might be able to do something with, so when I came across this thrown out in the street I claimed it to take a look. This shows how I used a Raspberry Pi Pico to decode the keyboard part and turn it into … Continue reading Toy Keyboard Matrix Decode with the Pi Pico →

Vintage Phone USB MIDI Controller

This is the USB MIDI controller version of the Vintage Phone MIDI Controller. As the USB MIDI support is much easier in CircuitPython than MicroPython, this is also a version of the keypad controller code for CircuitPython too. Warning! I strongly recommend using old or second hand equipment for your experiments. I am not responsible for … Continue reading Vintage Phone USB MIDI Controller →

Vintage Phone MIDI Controller

I happened across a pretty dirty Doro x20 push-button phone in some very 70s colours in my garage as part of a clear out and thought it might make a fun MIDI controller. My first experiment uses a Raspberry Pi Pico (in "sawn-off" mode - see later!). In this follow-up post, I turn the phone … Continue reading Vintage Phone MIDI Controller →