Poor man’s Luxury Car Dome Light

If you often drive early in the morning or at night, you spend most of your time in a dark vehicle, and at that time a small interior/dome/cabin light becomes an indispensable widget if you […]

An Eternal LED Scarecrow

Recently, I wanted to try an electronic scarecrow in my lab window to scare off some birds (often nocturnal) that make a lot of noise and dirt. Although there are many options for building one, […]

Learn To Play with Ceramic Resonators

As Wikipedia says, a ceramic resonator is an electronic component consisting of a piece of a piezoelectric ceramic material with two or three metal electrodes attached. Like the similar quartz crystal, when connected in an […]

Tricolor LED Signal Baton

An LED signal baton (also called marshalling torch) is a proven gadget to head traffic. Primarily it is widely used by traffic police, attendants etc. to channelize traffic but it is a great handy aid […]

Universal Pulse Extender Module

On certain occasions it is necessary to use a sensor module that generates a relatively short pulse to indicate a change of status. If the duration of its output signal is too short, the associated […]