todbot blog

SerialPlotster is a graphing tool for data coming from microcontrollers, like Arduino, CircuitPython or MicroPython.

Here’s the process I’ve been using to add a silkscreen image to the exported STEP model from KiCad to Fusion 360.

I am a big fan of these PCM5102A I2S DAC boards (3 for $15!

In many LED animations, you need to apply an operation to all LEDs as fast as possible.

Did you know you can run multiple displays in CircuitPython?

CircuitPython is an amazing microcontroller programming platform, running on many different chips and boards while providing a consistent API.

Over on github, I’ve been extending my experiments with the Arduino Mozzi synth library.

Mozzi is an audio synthesis library for Arduino that can do multi-oscillator synthesis with filters and modulation on even an Arduino Uno.

Neopixel LEDs with only two wires?!

I like minimal solutions to problems.

I help support the USB HID projects hidapi and node-hid.

If you are like me, you play around with Neopixel / WS2812-style LEDs a lot.

I’ve not done much on our plotter Xmas tree this week because, well… if you follow me on Twitter, it’s likely you’ve seen me ramble on about these crazy new Christmas Tree lights we got for our tree (first tree ever!).

We recently got some inexpensive multicolored 0.3mm technical markers (AmzAffil) for use on the AxiDraw and they are pretty good!

For the month of December, Carlyn and I are making a vaguely tree-shaped “calendar” with 31 boxes, 30mm x 30mm each.