Circuits & Schematics

An only slightly less simple followup circuit also ratios sensor capacitance to a reference capacitor to measure micrometers this time linearly. A few weeks ago, Design Ideas published a simple circuit of mine that provides an analog interface to ...

The circuit shown in Figure 1 is a complete microphone signal conditioning system based on a single SSM2166 integrated circuit. Designed primarily for voiceband applications, this integrated circuit provides amplification, RMS detection, limiting, ...

Here’s a neat and novel way of using a long-tailed pair to drive not just two but three LEDs. As everyone knows, rainbows always have pots of gold at their ends. This Design Idea reverses that, starting with a pot (no gold, alas) and ending ...

Circuits for converting 4 to 20 mA analog current loop signals to 0 to 20 mA may be hot topics, but hot implementations of those circuits are not. Circuit designs for conversion of 4 to 20 mA analog current loop signals, which are ubiquitous in ...

This circuit uses a few FETs and logic devices to down convert a DC voltage to about one half its value. Materials on the topic Datasheet Fairchild MM74C14 Datasheet Diodes ZVN2106A Datasheet Diodes ZVP2106A discovercircuits.com

The ubiquity of the 4 to 20 mA current loop in analog process monitoring and control creates possibilities for peculiar designs of circuits for unusual accessory functions. Figure 1 shows an example. It does precision conversion of 4-20 mA to 0-20 ...

This project presents the design and implementation of a dual-fan PWM cooling circuit, integrating a compact and efficient power supply with intelligent fan speed regulation. The circuit consists of two main parts: a 6 W isolated flyback converter ...

This circuit can produce high speed output signals with fast rise and fall times. The unique charge pump action allows the voltage of the upper P-ch device to range from millivolts to hundreds of volts. The output current is only limited by the ...

This simple circuit can protect a sensitive electronic circuit from an accidental connection of a battery with a reversed polarity. The N-channel FET connects the electronic device to the battery only when the polarity is correct. The circuit shown ...

This Design Idea describes a versatile test circuit for zener diodes after yet another misread zener diode had infiltrated the ranks of 1N4148 diodes assembled on a pc board. As a bonus, the circuit can serve as a moderate-voltage, power-limited ...