Fluid Level Detector (LM1830N)

Linear-triangle-wave-timer

Using one current source for tbe charge and discharge path in this circuit ensures identical rise and fall times at the capacitor terminal. A Darlington pair ensures identical biasing of the IC during the charge and discharge cycles. The period of the triangle wave is: T=0.46VC1/R2.

Music on hold

With this music-on-hold device, you can answer the phone in one room, place the caller on hold, and then pick up the phone again at another location.

Xenon Flasher

Using a voltage-doubler supply, this circuit charges a 60-/aF capacitor and discharges it through a Xenon lamp. The SIDAC dev

FM radio with TDA7000

An FM radio on a single chip requiring only a few simple peripheral components. In particular the ship requires only one simple coil and alignment is very easy. The chip includes an RF input stage, mixer, local oscillator, IF amplifier/limiter, phase demodulator, mute detector and mute switch....

Ultra-high gain audio amplifier

Sometimes called the JFET µ-amp, this circuit provides a very low power, high gain amplifying function. Since µ of a JFET increases as drain current decreases, the lower drain current is, the more gain you get

Air-Flow Detector Circuit

Two precision temperature sensors are used to detect a small temperature difference. When air flow occurs, self-heating of the LM335 is reduced, and the output of the two temperature sensors is unequal.

Melody Circuit Circuit

A high-quality melody circuit. The slow decay waveform produced will create chime-like notes. Pitch, tempo,

PIC16CS4 Programmer

Most of you will certainly already installed on your computer one of the many software tools move freely from hand to hand and is suitable for programming the PIC 16C84. One of the most popular of this kind is the RIR02 of Silicon Studios. The circuit described below, is perhaps the simplest PIC...