ESC Con 2015

Design Ideas

More Design Ideas

Simple circuit measures optocoupler's response time

Measure the response speed of optocouplers in order to select matching devices. Read More...

Circuit provides visual verification of IR pulses

Use a transimpedance amplifier to drive an LED. Read More...

An LED's intrinsic capacitance works in a 650-mV LRC circuit

The LED and a discrete inductor form an LC tank circuit. Read More...

Circuit provides universal ac-input-voltage adapter

Use a TRIAC and optocoupler to automatically change between doubler and bridge configurations. Read More...

Logic probe uses two comparators

Build a logic probe whose voltage thresholds vary with your circuit's power supply voltage. Read More...

DAC fine-tunes reference output

Adding a DAC and op amp makes a precision adjustable reference. Read More...

LEDs indicate sound level

Build a battery-operated portable meter to measure sound-pressure levels. Read More...

Driver circuit lights architectural and interior LEDs

Hold the current constant and within tolerance. Read More...

Use op amps to make automatic-ORing power selector

Replace diodes with FETs to reduce power loss. Read More...

Charging time indicates capacitor value

A comparator changes state when capacitor voltages are equal during rise and fall, which triggers a time measurement. Read More...

Positive edges trigger parabolic timebase generator

Generate sawtooth, quadratic-parabolic, and cubic-parabolic signals. Read More...

Measure small currents without adding resistive insertion loss

Floating current to voltage converter can be inserted in-line with no voltage drop and no need for a ground reference. Read More...

Power resistor varies in value

Under controlled conditions, a MOSFET can function as a variable power resistor. Read More...

Minimize noise in power-supply measurements

Eliminating excess noise from an oscilloscope probe yields better measurements. Read More...

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...

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