ESC Con 2015

Design Ideas

More Design Ideas

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...

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...

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