Design Ideas

More Design Ideas

Condenser microphone uses dc-coupled impedance converter

Eliminate transformers and coupling capacitors in this self-balancing microphone interface. Read More...

Simple sawtooth generator operates at high frequency

Use a digital logic gate to generate an analog waveform. Read More...

Dual regulator handles two input voltages

Use a pair of MOSFETs to switch between 3.3 and 5V regulated voltage. Read More...

Circuit simultaneously delivers square and square root of two input voltages

Perform mathematical computations using analog techniques. Read More...

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...

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