As shown on the figure 7-6, the judger consists of the 556 anddouble-color LED. The actable multivibrator consists of the the right side of 556 and R1,...
As shown in Figure 5-20, 555 and IC1, VT1, C etc. form VCO, the changing of input voltage VB1 causes the oscillation frequency of IC2 changing with log...
Description: The overall frequency of the PWM signal in this circuit is determined by the values of R1 and C1. In the schematic above, this has been se...
As shown on the figure 9-41, the 555 time base circuit and R1,C1 make up a freedom multivibrator. The oscillation frequency depends on the R1 and C1. T...
The hypotension rectifier circuit provides IC and relay protection circuit with VDD=11V voltage source. 555 and sample network are connected into RS tr...
Here is555toggle relay circuit. this 555 circuit below toggles a relay when a button is pressed.When the button is released, the capacitor will charge ...
Compared to the usual 555 pulse width modulator, this circuit connects resistance R3 between C1 and 2, 6 feet, it can decrease C1's voltage amplitude. ...
This E-Lark circuit can make a fluctuating and toned sound when exposed in light of different sensitivity, it is like that in the figure 3-22.The core ...
This article describes the 555 IC PWM Motor Control with Current Limiter CIRCUIT (TC4469). The principle is very simple, very practical. The circuit co...
The diagram below circuits the piezo transducer which is used to trigger a 555 monostable circuit. Instead of triggering a monostable circuit, a piezo ...
To provide rapid motor speed changes and motor direction reversal, four outputs drive a MOSFET H-bridge. N-channel devices are the lower rail power MOS...
The current transformer LH couples out the current which flows the three phase proportionally, after rectificated and filtered by D1, D2, D3, C1, C2, C...
This voice control music doorbell circuit uses two integrated circuit, a 3V battery to supply. Its static consumption current is about 100uA which woul...
As shown this circuit is specially designed. The light control switch and the electrical networks are connected by the two-wire connected method. It ca...
There are two tasks for duplex filter: ① to absorb unwanted mixer output signals so that they do not reflect back to the mixer; ② to send wanted si...
This article describes a 555 Timer As An A / D Converter (NE555). The content is very simple, very helpful. Components in this article can help you und...
This article describes the Sawtooth Wave Oscillator Using 555 IC (NE555). The content is very simple, very helpful. Components in this article can help...
As shown in Figure 7-8, measuring circuit uses 555 as the core, and 555,R1, R2, R3, Rx, C1 form an astable multivibrator.Changing the switch K can chan...
The reminder circuit is shown in Figure 13-23. It is a 555 timing circuit which fulfills two functions of time delay and oscillation, and it is simple ...
As shown in the picture 3-16, this closed loop is composed of three identical Smit triggers, end to end, the detained time of every trigger td=1.1(RP+R...
The figure as shown below is the complete set of three passive audio filters, which can be accessed or out of the circuit. These filters are designed f...
The picture shows the band-pass filter for AM broadcast band. This type of filter can be used for antenna and AM broadcast-band receiver’s antenna in...
Light emitted from incandescent light bulb reaches the photodiode through the lens, cylindrical lens and the slot of chrome optical encoding disk. Codi...
As shown in the figure 12-17, the circuit is composed of rectifier circuit, actable multivibrator IC1, count circuit IC2, unijunction oscillator and SC...
In the circuit, the timer NE555 forms a triangular wave generator, whose working frequency can reach 100KHz or so. The transistors Q1 and Q2 in the fig...
555 Timer With Audio Alarm Circuit Here is a very simple circuit for electronic timer with audio alarm. With the help of this circuit, audio alarm (sou...
The following figure shows DCR front-end circuit based on TDA-7000 according to Daulton's design. This circuit is designed similarly as others because ...
As shown in the figure 11-5, the electric rolling circle circuit is composed of clock generator, counting circuit and coding, display circuit.The astab...
As shown on the figure 7-30, this circuit consists of the ultrasonic transmitting circuit and receiving circuit. Its hydraulic measurement is better th...
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