The traditional diode AM detector is shown in Figure 1. This detector has to operate at zero DC potential, so if the source has a DC component, the R-C combination is needed to block the DC in the ...

Looking for a light project to teach young hackers some very basic electronics? Here’s a quick and easy weekend project, a simple metal detector! We all know 555 timers are very useful and pop up in a ...

The metal detector circuit shown here must represent the limits of simplicity for a metal detector, yet the design works surprisingly well. It uses just one 40106 hex Schmitt inverter IC, a capacitor ...