During the past six months we've been publishing a Small Circuit every week on our website and in our newsletter. The circuit can be assembled without any special, exotic parts and with a normal soldering iron on breadboard. Occasionally it' s a circuit 'from days galore' and otherwise, a recent entry from a reader, or an idea from our lab. These circuits are discussed on the website - sometimes controversially - and that' s exactly what we want: to stimulate discussions, experiments and readers' own discoveries! Here is a selection from the first 26 episodes.