Design Con 2015

Design Ideas

More Design Ideas

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...

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...

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