Design Ideas

More Design Ideas

CMOS gate makes long-duration timers using RC components

Use a common CMOS gate to make long duration timers using low-value RC components. Read More...

Microcontroller drives piezoelectric buzzer at high voltage

Drive the buzzer directly from the μC’s I/O pins. Read More...

Conversion circuit handles binary or BCD

Separate binary and BCD up/down counters permit both binary-to-BCD and BCD-to-binary conversion in one circuit. Read More...

Simple diode serves as a sensor for a thermal probe

A two-transistor thermal probe can be used to diagnose circuit problems, such as hot components and thermal runaway. Read More...

Use an LED matrix horizontally

Using one 5×7 LED matrix horizontally instead of vertically allows the display of two characters instead of one. Read More...

RC-timed shutoff function uses op amp and momentary switch

Battery-operated instrument benefited from auto-power shutdown. Read More...

Use an integrator instead of coupling capacitors

Level-shift a signal with an unknown dc offset to a known offset without ac coupling. Read More...

Stable pulse generator uses matched transistors in a current mirror

Inexpensive dual transistors work as well as do legacy matched pairs. Read More...

Implement an audio-frequency tilt-equalizer filter

Developing the transfer functions lets you customize the filter. Read More...

Circuit provides 70 dB of AGC

A comparator autoranges to ensure that the automatic-gain-control section sees a signal between −60 and −25 dBm, keeping the FET in its linear Read More...

Wireless temperature monitor has data-logging capabilities

You can make a wireless temps system with two ICs. Read More...

Make an asynchronous clock for VPX-based PCIe systems

Careful crystal selection and an FPGA are key to success. Read More...

Use a photoelectric-FET optocoupler as a linear voltage-controlled potentiometer

The circuit takes advantage of an identical photo-FET as a feedback element. Read More...

Simple circuit tests twisted-pair cables

Quickly test a cable containing twisted-wire pairs and detect open or reversed pairs, shorted pairs, and shorts between unrelated pairs. Read More...

Use a boost regulator beyond its rated voltage

Use an external FET in a common-gate cascode configuration. Read More...

Measure an amplifier's THD without external filters

Adding a secondary amplifier boosts the THD to measurable levels. Read More...

FEATURED RESOURCES