Design Ideas

More Design Ideas

Current monitor uses Hall sensor

Use a Hall-effect sensor to measure dc current in the range of 0 to 40A. Read More...

Control your holiday lights with a magic wand

A magnet waved past a Hall-effect sensor does the trick. Read More...

Circuit provides more accurate multiplication

Convert into and out of the sampled-data domain to get an accurate multiplication. Read More...

A few added components make a self-contained controller for 100A load

Add a few components and you have a stand-alone piece of test gear. Read More...

Simple night-light uses a photoresistor to detect dusk

You can adjust this battery-powered circuit for different levels. Read More...

A diode ladder multiplies voltage under software control

An eight-pin micro multiplies, monitors, and delivers a boosted voltage to a load. Read More...

Inexpensive VFC features good linearity and dynamic range

A voltage to frequency converter circuit builds on the work of two analog greats. Read More...

Mains-driven zero-crossing detector uses only a few high-voltage parts

You can get isolation with low power consumption using this simple circuit. Read More...

Build an op amp with three discrete transistors

This simple ac-coupled design inverts, runs off a single supply, and is self-biasing. Read More...

Charger extends lead-acid-battery life

A circuit that properly charges sealed lead-acid batteries ensures long, trouble-free service. Read More...

Add extra output to a boost converter

The added output has its own voltage regulation. Read More...

Fabricate a high-resolution sensor-to-USB interface

A precision analog acquisition system fits in your pocket. Read More...

Converters yield droop-free S/H circuit

Use an ADC and DAC back-to-back to process signals up to 1 kHz. Read More...

Circuit detects rapidly falling signals and rejects noise

Combine an op-amp and a logic IC to determine signal peaks beyond a set threshold. Read More...

Hack into a stopwatch to make a phototimer

Two transistors create a pulse train to operate a stopwatch. Read More...

Comparator directly controls power-MOSFET gate

Circuit switching point is independent of unregulated FET voltage. Read More...

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