a 12 V battery; an LED diode; a 470 Ohm resistor, which works as protection and limitation for the LED diode; a 12 V buzzer. It emits an acoustic sound if it is electrically powered. As can be seen ...

Planning a game of Hacker Jeopardy at your next meetup? You’re going to want some proper buzzers to complete the experience, but why buy when you can build? [Flute Systems] has released an open source ...

These two headlight reminder circuits are easy to install and operate on the KISS (Keep It Simple Stupid) principle. The simple circuit involves adding just a 12V piezo buzzer between the lights ...