Universal Power Control board
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The Maxun solarbike project
A lightweight solarbike that drives entirely by solar energy Imagine that you can cycle entirely by the sun's power. Until now this was a pie in the sky. But with my invention of the Maxun One sol...
Bluetooth Watt meter cockpit
Afmaken Bluetooth Watt meter cockpit See also Maxun e-kit cable killer Bluetooth Watt meter cockpit Bluetooth Watt meter dongle Yamaha hacking dongle Two-wire current-controlled bus Sal...
Software oscilloscope for inside microcontroller
Oscilloscope for measuring internal Arduino values An Arduino has an inside world and outside world. With an oscilloscope we can measure the outside world. However, everything what happens inside ...
Yamaha dongle to use 3rd party batteries
Introduction This device has two uses: Yamaha battery hacking dongle to use any 3rd party battery instead of the original Yamaha battery. Described in this article. Bluetooth Watt meter ...
Spoty precision SMD micro-dot solder paste dispenser
With this tool you can precisely dispense very small dots of solder paste. Although this solder paste dispenser is cheap and uncomplicated, it works better for small SMD parts than many automatic d...
Arduino switch library with Short/Long Press, Double Click
I made this switch library years ago when decent switch libraries didn't exist, and over the years it has become more and more extended. It is now the best out there according to people who have co...
Ergonomic thumb switch for e-bike throttle control and electronic gear-shifting
Introduction Efficient speed control is crucial for a comfortable and enjoyable e-bike riding experience. This article presents an innovative solution for speed control through an ergonomically de...
Connectorless self-clamping zigzag TAG In-Circuit Programming connector
For (TAG) programming and testing, I don’t use physical connectors on the PCB but connectorless self-clamping zigzag connectors. The pin header of the programming tool is inserted directly into the...
Open source robust passive two-wire bus
Abstract To reduce the cabling on an ebike, I have developed a simple, but very robust, 2-wire control bus. The signal and the power supply go together with in total two wires: GND and 5V. Th...
I'm an inventor with over 40-years of experience in electronic engineering and software development. I have delivered unique engineering solutions to the commercial industry on a wide range of pr...
DIY battery tab spot welder
I have developed the D.I.Y spot welder because I needed a special spot welder for the building of my Maxun One solar bike. It turned out that the spot welder is being built by many people...
Dual pulse battery tab spot welder controller
This advanced controller was used by many people and has a unique reduced inrush current circuit that prevents main fuse blow up.
Arduino Universal Power Control (UPC) board
The UPC is an Arduino board, complete with power supply, triac power control, display and menu buttons. Because of the many built-in functions you can quickly and easily create all kinds of useful ...
Vacuum tube works on 3.3V totally
Vacuum tubes are awkward, need always 6.3V filament and high supply voltage? No, they can also work on 3.3V. I have built a vacuum tube pre-amplifier that runs entirely on 3.3V, inclusive the ...
SAM 15x15mm Arduino Zero compatible SAMD21 board
The SAM 15x15 is a very small Arduino development board, with the same powerful controller as the Arduino Zero: the SAMD21G18. All I/O pins are used: despite the small size, it has more I/O pins th...
S06P / S-KU63 torque simulation motor controller review
Related articles Repairing any ebike mid-drive or hub motor electronics with an external Chinese motor controller Motor controller How do torque simulation motor controllers work? Two-wire cu...
Bosch Active Line 3 mid-drive motor tear down
For my solar powered bicycle, the Maxun One, I designed a very powerful and lightweight mid-drive motor. I also wanted to investigate whether I could use a Bosch Active Line 3 motor. The Bosch moto...
DIY voltage & current reference standard
I have developed a cheap multimeter calibration reference by which you can calibrate a digital multimeter yourself. Here we calibrate my favorite multimeter, the PeakTech 2010, it has a lot of...
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