It uses a PN Photodiode as the light sensor and IC CA3140 as voltage ... voltage at one input is kept fixed using a Zener diode or a potential divider resistor chain. In the circuit, the voltage at ...

This fire sensor ... circuit to give a Fire force siren. This ROM IC has an internal oscillator and can generate different tones based on its pin connections. Here pin 6 is shorted with the Vcc pin 5 ...

Front-end limiter circuits using Schottky and PIN diodes can provide needed protection ... it can prevent power sensor burn-out. This new circuit arrangement for the Schottky-PIN limiter ...

In other words, it can become a diode of sorts ... can accumulate. The sensor allows the pilot light to be automatically re-ignited if the flame is no longer present. The circuit is a surprisingly ...

Front-end limiter circuits using Schottky and PIN diodes can provide needed protection in communications and other RF systems. However, designers still must deal with the upper-frequency limit ...