| This circuit is designed to allow a small DC motor to run at low rotational speeds. The motor is driven using a PWM signal, in which the dut...
Rolf Blijleven (9)
| A night light that flashes on when someone walks past, an IR LED, a few resistors, a capacitor and an Arduino with a bit of software. This i...
| Even if your camera, mouse or keyboard says that its batteries (AA or AAA) are flat, this does not mean that they are exhausted. In many cas...
| Powering stand-alone circuits from solar cells is perfectly possible as long as continuous operation is not required. You can also accumulat...
| Alternative energy is a hot topic. In this article we describe several options for powering circuits from solar energy. As you can see, sign...
| Detection and analysis of gasses is a requirement for numerous branches of industry and science, from petrochemical to medical instrumentati...
| When I first laid eyes on these two black boxes I knew one thing right away: this is quality equipment, and it must be preserved. Along with...
| If you want to have an intelligent circuit communicate with its companions, the standard approach is to use the omnipresent USB port or an I...
| A bakelite box with rounded corners, two large knobs on top and a nice small meter. Still in perfect condition, with proper Test Terminals....