The circuit isshown in the chart, when thecooking smoke smells heavy,the hood starts automatically to emitsound and light alarm signals ; until the smo...
This circuit uses a CA3240E to sense small currents flowing between contact points on a touch plate, which consists of a PC board metalization grid. Wh...
The picture shows the IGBT grid electrode driving circuit practical example. This circuit should be noted the following tips:(1)PC should choose the op...
This simple water detector circuit uses alternative voltage in order to prevent the corrosion of the electrodes. It is easy to build and uses N1 as a t...
Q1 is an oscillator tuned to a quiet spot in the FM broadcast band. Dc from the line powers the bug. Diodes D1 through D4 ensure proper polarity. R1 ma...
SECAM system uses time multiplexing of two chrominance signals, transmitted sequentially, with one-line memory in receiver circuit.-R. Chaste, P. Cassa...
L-C oscillator provides carrier voltages of 4 V rms at 3 kc to blood-volume servo amplifier and to venous and arterial pressure indicator-Amplitude sta...
Circuit using single quad opamp measures relative change in con-centration of salt solution by monitoring its conductance. Use of alternating current t...
Pulse amplifier using an MC1545G for applications in radar IFs, pulse width modulation and pulse amplitude modulation systems (courtesy Motorola Semico...
The MAX730 series integrated voltage regulator internal equivalent circuit is shown in the picture....
It uses the charging and discharging characteristic of capacitor C and the negative resistance characteristic of triode V under the breakdown condition...
This device can be used to recover demodulated video from the output of an ATV transmitter. A small sample of the signal on the antenna feeder is tappe...
4.5 MHz sound section for TV using one ECG706 IC.The chip contains a wide-band IF amplifier-limiter section，an FM detector stage，a zener regulated ...
Loop 5 meters square picks up in duction field of four-transmitter and feeds r-f amplifier V1. Operating frequency is converted to 50 kc by V2 and ampl...
Without a heatsink, Triac Q1 handles up to a 400-watt lamp. The neon lamp does not trip the gate until it conducts so the lamp turns on a medium brilli...
Ultralong delay timer using two 8240 16-pin DIPs. The time base of unit 2 is disabled. The output is normally high when the system is reset. Upon appli...
The animal litter teller circuit is composed of the detection control circuit and alarm signal transmission circuit, and it is shown in Figure 4-16. De...
Uses amplifier burst as reference to determine amount of bias on 6rst stage of chromo amplifier. If burst amplifier falls below certain level, color ki...
The digital lock circuit is composed of the timing trigger circuit, trick lock circuit, sound and alarm circuit and control implementation circuit, and...
Vector computation circuit for VC2 = VA2 + VB2 using the 434 multiplier/divider chip and two AD741 op amps (courtesy Analog Devices, Inc.)....
The automatic refrigerator protection line is simple with full function, reliable sensitive action, and it is useful accessory for refrigerator. When t...
Video input circuitfor black and white transistor TV receiver permits feeding video output of TV typewriter to video driver in set, for producing chara...
The principle of circuitThe irrigation motor automatic protector circuit is formed by the power supply circuit and the detection/protection control cir...
This circuit shows a 9911 used as a driver for multiple lines, which allows a video signal to be routed to 5 (or more) individual directions. A typical...
Gives exact frame rate at each instant. Lens is removed for test. Light beam is projected into camera, and reflected back from pressure plate in film g...
The the loop antenna L1 for emission also serves as the oscillation coil, the high-frequency current flowing in antenna is synchronized resonance with ...
Measuring circuit is composed of monostable oscillator ( 4538 ), the divider ( 4024), pulse generator ( ICM7555 ), counter ( 4040), latch ( 74HC513 ), ...
The optical electronic doorbell circuit is composed of the power supply circuit, oscillator circuit, music generating circuit and color bulb control ci...
The eggs hatch incubator circuit is composed of the power supply circuit, temperature control circuit and sound and light alarm circuit, and it is show...
Interface circuit controls two tape decks for updating mailing lists or other sequential files stored on magnetic tape in audio cassettes. Two cassette...
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