Electronics hobby blog

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.

The flat screen TV was just the beginning of a trend to save space on objects that reside in our living room. This idea can also be applied to the tradition of decorating a Christmas tree.

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.

Cyclops hotend has two filament inputs and merges them into one output. My Prusa i3 clone already had a Chimera extruder, but I was curious about the single nozzle solution.

Acorn RISC OS requires a mouse and it is very limited in use without it. This post describes in detail how to create a PS/2 Arduino adapter that connects to the 9-pin Mini DIN mouse port

Acorn RISC OS requires a mouse and it is very limited in use without it. This post describes in detail how to create a PS/2 Arduino adapter that connects to the 9-pin Mini DIN mouse port.

I was very fortunate to get this vintage computer from my friend Eric. This Acorn Archimedes A3010 was produced in 1992 by Acorn Computers and was based upon an ARM250 RISC microprocessor. Right away I proceeded to connect the computer to see if it still was in a working condition.

The bartop arcade cabinet is finished. The only thing that is left to do is to install the RetroPie system on the Raspberry Pi 3.

To finish up the cabinet we will place a marquee sign and connect the LEDs buttons on the control panel. In the end we will also add a protective plexiglass sheet in front of the screen.

It is time to close the opening on the back of our cabinet and add a cooling fan. A while back we cut out a panel that will function as the back door and predrilled some holes to attach the hinge. We can now finish that task.