In this project, I'll make a small circuit capable of controlling a servo, it is a servo tester made out of a 555 timer IC.

It is very simple; connect the +9V from the battery to the left hand pin, ground the middle pin, and the right hand is +5V. The most basic circuit in any synthesizer is the oscillator.

The electronic version is also simple to make, and is a great introduction to the concept of circuits – the cornerstone of many maker projects and core knowledge for the budding robot-builder.

Master these simple circuits and you'll be ready to create a glowing play dough masterpiece. But before you start, you'll need to check out Play dough circuits 1: getting started to learn about ...

In each case the basic circuit can be modified to make it dimmable with acceptable performance met without adding greatly to the component cost and complexity. The goal here is to provide dimmable ...