Pomodoro Timer
As I wanted to test a rotary encoder, I made a pomodoro timer, see also https://en.wikipedia.org/wiki/Pomodoro_Technique. In the lock-down phases during Corona I do use it to prevent long sitting …
Posts
Debounce Circuit
Designed hardware debounce PCB instead of solving debouncing in software. As hardware engineer I like to solve debounce problems in hardware, rather than solve it in software. Of course this …
LoRa Button
Just for experimental purposes and tracking with TTN mapper (ttnmapper.org) I made a LoR node with a button to send one LoRaWAN package. Of course it is based my own …
Bluetooth Cisco Console connection
As Cisco instructor for CCNA and DevNet on a Secondary Technical School, sometimes I give live demonstrations on Cisco devices. These devices a mounted in racks, so it should be …
Co2 and environment meter with LoRa capability
This is a Co2 meter and environment meter: Temperature, Humidity, Pressure. With a rechargeable cell it is possible to use it with a USB power supply or standalone for about …
Li-Ion/Li-Po Power Supply controller
For another project I wanted to use a Li-Ion or Li-Po battery charger and controller that gave a 3V3 and 5V output. The power demands were not high. After searching …
Soladin600 PV monitor
In April this year (2020) a friend of mine asked if I could make a device that monitors his more than 10 years old Solar System (Photo Voltaic). The power …
Considerations of Power consumption on LoRa Nodes
After designing and building 2 types of Low Power LoRa nodes I did some measurements and calculations. I hope it will benefit your considerations how to use and program Low …
MiniPill LoRa – Low Power Node – STM32L051
After successful making a LoRa node with a ATtiny84 and BME sensor (https://www.iot-lab.org/blog/101/), I wanted to reproduce this node with a ARM processor. After 2 years of research and attempts, …
Programming STM32
For a couple of years I try to switch to STM32 microcontrollers. With ups and downs I learned how to handle these versatile microcontrollers. The first step was to be …
Mini Blue Pill – development board
In june 2018 I made my first SMD PCB to create a Bluepill clone. The goal was to 1) get more familiair with the ARM processors and 2) Reproduce my …
Interfacing Dutch Smart Meter
Due to the small form factor, low power consumption I’ve used the Orange Pi Zero LTS to make an interface to the Dutch Smart Meter (DSMR). In earlier post I …