Design Con 2015

Design Ideas

More Design Ideas

Circuit measures battery capacity

Know how much cell or battery capacity you use to power a device. Read More...

Programmable driver targets piezoelectric actuators

Use a microcontroller and two op amps to drive a peizo-screw actuator. Read More...

Circuit boosts voltage to piezoelectric transducers

Drive a piezo device at maximum power and and its resonant frequency. Read More...

Arrange LEDs as seven-segment displays

If you have a pin-limited PIC microcontroller, you can still produce a seven-segment display. Read More...

Logic gates form high-impedance voltmeter

Estimate voltages across high-value resistances. Read More...

Waveform generator minimizes amplitude dependency

Improve a waveform generator's immunity to changes in power-supply voltage. Read More...

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...

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