The venerable 555-type timer makes an effective driver for power MOSFETs, but you have to understand the drive situation when selecting the correct variation of the basic timer. This idea shows how ...

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Take a Raspberry Pi Pico and connect a 555 timer to one of its GPIOs. Arrange for the 555 to poke the Pico about 10 times a second. Treat that "poke" as an interrupt. On the interrupt, light the ...

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At the risk of dating myself, I’m old enough to remember the days when Best Buy had a formidable rival in superstore chains: Circuit City. A cross between an appliance store (at least until it stopped ...

A metal detector is an invaluable tool for those who love treasure hunting, relic hunting, or even just searching for lost items at the beach. With the right materials and some basic knowledge, you ...

Often you need a monoflop in your projects. Just think of an occupancy sensor that turn the lights out in the corridor a while after the last movement. Also, for certain applications it is essential ...

Sometimes the best inspiration is limitation. The 555 timer does “one thing” — compares a voltage to a couple thresholds and outputs a signal accordingly. It’s two comparators, a voltage ladder, and a ...

Abstract: The 555 timer IC is a well-known integrated circuit having been widely used as a pulse generator. We propose a circuit containing a single 555 IC, an LED, an inductor, two capacitors, and ...