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Design Ideas

More Design Ideas

Produce current from positive or negative high-voltage supplies

A simple modification lets you use an N-channel MOSFET in both applications. Read More...

Measure resistance and temperature with a sound card

Measure resistance and use free software to convert to temperature. Read More...

Circuit secures bootstrap operation under light load

Additional circuit lets a capacitor charge, preventing voltage dips. Read More...

Build an accurate bipolar voltage reference

Use a precision amplifier to get a voltage reference from a single power supply. Read More...

Send MIDI signals over long distances

A single Category 5 cable links MIDI devices up to 100m away. Read More...

MOSFET provides high power at low loss

Use a MOSFET as a rectifier and reduce voltage drop and thus power consumption. Read More...

Light an LED without wasting energy

Use an inductor to store energy and deliver current. Read More...

Increase efficiency in embedded digital-I/O lines

Multiplex IO lines and drive LEDS without ghosting. Read More...

Modulating a reference allows maximum-value search for phase detection

Modulating a reference and target signal lets you find the maximum modulation based on modulation phase. Read More...

Offline supply drives LEDs

Keep LEDs lit when AC voltage drops. Read More...

Low-component-count logic probe works with TTL and CMOS logic

LED's indicate logic levels. Read More...

Circuit implements photovoltaic-module simulator

Use combinations of diodes to simulate photovoltaic cells. Read More...

Switch circuit controls lights

A light-dependent resistor, a comparator, and a triac control when a light turns on and off. Read More...

Isolated PWM suits low frequencies

Use a voltage-controlled PWM chip to increase low frequencies while preserving the duty cycle. Read More...

Anticipator circuit speeds signal settling to a final value

Use a differentiator circuit to predict the final value of an exponential signal. Read More...

Schmitt trigger provides toggle function

Make a digital signal toggle without a flip-flop. Read More...