Variable 400V DC power supply – part I.

Variable 400V DC power supply – part I.

January 30, 2021Posted inSTM32 Arm
Experimentation with vacuum tubes requires a high voltage power supply, typically 200-400V DC. Most hobby labs are not equipped with such a device. This step-up converter allows you to boost up your benchtop 0-24V variable DC power supply to a high voltage power supply.
Radiomaster TX16S redundant link

Radiomaster TX16S redundant link

November 8, 2020Posted inRC modeling
Some time ago someone mentioned on a blog that he believes an OpenTX radio combined with a weatronic module would be the best RC radio. I really like OpenTX - because its features - and I created a redundant RC transmitter module which I believe can be even better than weatronic modules. Here we go.…
Redundant RC transmitter module & 8 channel receiver

Redundant RC transmitter module & 8 channel receiver

July 5, 2020Posted inRC modeling
Mostly high end RC transmitters/receivers are using the good old CC2500 chipset. When you hear SX1280 probably the first word pops in your mind is LoRa. However SX1280 chip also supports FLRC mode which is very similar to MSK used on CC2500, but according to the documentation SX1280 does it with 16 dBm higher receiver…
RC current sensor

RC current sensor

March 1, 2020Posted inRC modeling
Most of the RC current sensor designs are using a hall effect-based current sensor, like the ACS758. In this project I would like to try something different (more difficult?) and use a conventional high-side current sensor to achieve the following goals: Maximum 60A continuous current sensing capability, Maximum 5S (18.5V) LiPo battery input, Send telemetry…
High resolution PWM signal generation for RC servos with STM32

High resolution PWM signal generation for RC servos with STM32

November 26, 2018Posted inSTM32 Arm
Currently, I'm building an RC transmitter/receiver based on the SX1280 RF chip. One of the goal for the project is that I want 12 bit servo resolution from the sticks all away down to the servos. Partly because modern digital servos have 12 bit resolution secondly a high-end transmitter is using 12 bits anyway. I…
Controlling RC servos wirelessly over UDP

Controlling RC servos wirelessly over UDP

October 19, 2018Posted inArduino, iOS
In this project I want to use my iPhone to control RC servos. I'll use the accelerometer to control two servos over UDP connection. This is a Proof Of Concept project to verify that a connection between an iPhone and a peripheral can achieve high update rates (higher than BLE) using UDP. Hardware ESP8266 (Wemos…