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Version 1 of rocket avionics - designed to keep rocket stable, determine apogee and deploy parachutes. Using Teensy 4.1 BMP280 Barometric Pressure sensor BNO055 9 axis orientation sensor Maths uses Quaternions

Drawing machine powered by arduino then teensy 4.1 Software written in python 3d printed pen holder, and stepper supports If you want a simple project to learn about how to control stepper drivers, this is it. There is an interesting translation from an x-y coordinate system to a triangular one. The hypotenuse of two right triangles is the length of each string from each stepper to pen. Long dr...

First full power test of the Tesla coil playing music 'Popcorn' - single MIDI channel. The sparks are producing the music, as we space the time between sparks, ie 260 sparks per seconds you get a middle c sound. Speed up the rate you get higher pitch sounds. Do this dynamically using a MIDI (musical instrument digital interface) and it plays music. Bridge: 2x Eupec BSM150GB1200DN2 IGBT's in ful...

0.21mm wire with a 0.246mm spacing. 3d printed V grove as wire guide over a bearing. The poor spacing about 1" into the coil was due to me stopping and inspecting... when I let it run it goes on smoothly.

My 2nd tesla coil Primary 7 turns Secondary 1035 turns of 32AWG (0.21mm) enamelled wire on 7.5cm (3") diameter 3d printed toroid covered in foil tape. ~Runs at around 385 Khz 4 x IRFP460A (20 amp) mosfets - underpowered but you have to start somewhere... ~60V across the bridge Based off Loneoceans SSTC2 but using a full bridge, and Arduino as interrupter. Note that the loneoceans schematic has ...

My first tesla coil. Primary 3.5 turns Secondary 1035 turns of 32AWG (0.21mm) enamelled wire on 7.5cm (3") diameter 3d printed toroid covered in foil tape. Standard slayer circuit, except using two matched TIP35C transistors in parallel instead of 1. 50K base resistor feeding both transistors 3 LEDs on Base/Emitter junction. 5 x 1uF caps in parallel across the supply voltage.

Neon wrasses like to sleep in sand beds. We spend over an hour trying to capture this one night and finally nailed it. The attempt at the David Attenborough voice was just to keep myself entertained as it took a long time to get. This is looking side on down a CADE 1800 fish tank that was only up for about 6 weeks (very young tank).