Electronics

MicroPython is a programming language that is derived from his big brother Python and is optimised to run on microcontrollers. In this blog we will focus how to get it running on ESP32 with a SSD1306 OLED display.

If you are a Trekkie, then you must remember the door chime that is played when someone wants to enter a quarters. In this blog I will describe how to create such a doorbell using Arduino Nano and some extra modules.

Helping scientific research by mining Gridcoins can be satisfactory. You contribute to various projects by donating your CPU power. In return you get Gridcoins. This mining process uses energy and we want to do this in an economical manner.

An important aspect of gaming is sound. For that purpose we will need a set a good speakers and an amplifer that will connect directly to the Raspberry Pi audio.

The most important part of a computer architecture is a clock circuit. The circuit described here has the option to run freely in a-stable mode and also operate in single step debugging mode. In this post I will describe how to implement this design in KiCad and manufacture a double sided printed circuit board.

There is something about blinking leds. Numerous projects are created with the 555 timer chip. To continue the tradition I will describe in detail the creation of a 555 astable timer board that was designed in the previous blog post.

KiCad is a great schematic and PCB design tool. It is easy to learn and fun to use, above all it is free. In this blog post we are going to design a simple circuit based on the 555-timer chip in astable mode.

After the dry film is applied to the copper layer, it can be etched. There is an option to use ferric chloride (FeCl₃), but it can not be reutilised and needs to be disposed.

Being able to make your own printed circuits boards is a skill that can come in handy. There are several ways to do this and I will describe the one that I use. First part of the process is the creation of a layer on top of the copper that prevents the solvent to dissolve it.

During the process of manufacturing of home-brew PCBs you need to expose the photosensitive film with ultraviolet light. A cheap and low power solution can be found in UV led strips.