Head or straw game - made with transistors - "Heads or tails" game

Reading time: <1 minut The project presented is a stable tilting circuit adapted to simulate the head or straw game. These types of circuits do not have stable states, they switch continuously between two unstable states, the transistors on the two branches passing one by one from the conduction state to the saturation state (tilting).

Practical assemblies with integrated circuit 555 - Automatic direction changer (round trip)

Reading time: 2 minute Despite its extremely large age, in this world of electronic components that is in perpetual motion, the age that has exceeded two and a half decades, the 555 circuit remains among the most popular, with almost no electronics magazine (in the country or in abroad) that does not contain an assembly with this IC should not be part.