Design Con 2015

Design Ideas

More Design Ideas

Compensate for four-wire sensor errors

Measure sensor values and calculate resistance. Read More...

LED-current limiter accepts ac or dc

Prevent excessive current from overdriving your LEDs. Read More...

Voltage inverter employs PWM

Use two diodes and two capacitors to generate a negative voltage. Read More...

Form positive pulses from negative pulses

Create positive pulses even when negative pulses vary in amplitude. Read More...

Use resistor noise to characterize a low-noise amplifier

Measure gain or noise with an AC voltmeter. Read More...

Protect power-LED strings from overcurrent

Add diodes and a transistor to a current mirror to prevent LED damage. Read More...

Simple flasher operates off ac mains

A few components create an illuminated switch. Read More...

Build a UWB pulse generator on an FPGA

Make pulses that reach twice an FPGA's clock frequency. Read More...

Generate swept sine/cosine waveforms with two filters

Phase difference holds between 89° and 90°. Read More...

Drive 16 LEDs with one I/O line

Use a shift register to successively turn on any LED. Read More...

Potentiometer calibrates photodiode amplifier

Control a potentiometer IC to adjust amplifier gain, compensating for optocoupler output variations. Read More...

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...

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