DIY WebCam arm-stand

I have got webcam some years ago, in a rather sad state with a missing foot. I already own some good webcams, I did not felt the need to fix this one, but as this is a very decent camera I still saved it a future project. I had some RaspberryPi point and shoot camera,… Read More »

Make a custom connector plug

I own a vintage audio equipment, that supports remote control connection through a socket populated on the back. I decided to build my own remote controller for the unit. Unfortunately this is a custom type of connector, and you cannot really by plug for this any more. In my case the equipment is a TEAC… Read More »

Build a bunch of test wires

I found these mini test-hooks useful, I already have built some of these, but now I build some. On one end of the cable there is a hook-probe, on the other end an alligator clip. I have purchased from eBay “10pcs 15inch Double-ended Test Leads Crocodile Clip Roach Clip Jumper Wire”, and “Multi-color 10 Pcs… Read More »

How NOT to 3D design a project box

I’m working on a project, where I need a case. So I designed a box in the idea in my mind, that printing two from the same part will fit together face to face. So I have added overhangs, and groves that should meet. But in the end it turned out that they don’t fit.… Read More »

How to design a line following robot

I already have shown how I have made an Arduino controller for my old LEGO robotic kit; and also, how to recognize colors. Now I will form a cool project around these achievements, and build a line following robot. This post focus on two key parts of the build: what is the recommended hardware design… Read More »

Bluetooth Amplifier case

It seams, that it is very popular now to build portable bluetooth boomboxes. I already have made an active speaker set, but it does not provide bluetooth connection, and while it was designed to portable, it does not contains battery. So now I wanted to have a more portable one with bluetooth support. The TDA7492P… Read More »

DIY Bunk-Bed

Design I wanted to build a bunk-bed on my own, as I did not have found one that matched my need. (Actually I just wanted to have a simple, but robust structure.) At the time of the design, I was not completely sure at what height the upper bed should be, so I’ve came up… Read More »

DIY Egg Decorating Machine project

Goal I have seen some egg painting machines out there, but I found them too complicated to be a DIY project. These are some kind of CNC laves. In my design the pen (aka. tool) is in your hand, so the pen movement not controlled by the machine. The machine only performs the rotation task.… Read More »

Chess clock

Preface Lately I play some chess again, and I was realized, that it will become very boring, if we do not limit the time of the game. So a chess clock is required, but instead of buying one, it seams to be a great DIY project, and we will have a hackabe clock around the… Read More »

Lego robot controller – Pin-outs

Wiring This is the pin mapping we have for the onboard components. Arduino pins This is the same, but from the other direction RF port pins 10DOF port pins Extension port pins This is the extension port pin-out. Top view. Dual color sensor extension panel Logical: Physical (top view): BPX 43 wiring