As show on the figure 6-17, this timer circuit consists of the three-level monostable timer circuit. It can be used in the program's timer control and ...
The working principle of the circuit The automobile brake fluid monitor circuit consists of the liquid level detection circuit and storage liquid state...
As shown, this circuit is a multivibrator oscillator made up by 555, C1 and constant current charging and discharging circuit. Thc IC2 uses 5G28C as a ...
As shown in the figure 10-16, 555 obtains VDD=+12V supply voltage from hypotension rectifier circuit. 555 is in reset state, J has no action, it transm...
The bicycle bell circuit intruduced in this example can give the voice tone: Please make way, thank you after the touching by hands.The circuit's worki...
The multivibrator is composed of 555 time base circuit and R4, R5, C2. It always has electricity, 555's 4 foot is clampped to low level(about 0.3V) by ...
555 timer produces a guaranteed delay, allowing the driver to deactivate the alarm and the elimination of a control switch vulnerable outside. The RCS ...
This multivibrator circuit is composed as the core of 555 time base circuit, the tone and musical note is changed by changing the on/off of the two gro...
The chart shows the automatic refrigerator protection circuit. The protection is composed of the step-down circuit, undervoltage and overvoltage contro...
Circuit diagram is designed for tracking transmitter audio tone in FM frequency band. Circuits that can be used the signal transmitter or remote contro...
The circuit uses a ring diode mixer with balanced input, output and LO ports. It can achieve isolation between ports of 30 ~ 60dB. In the actual circui...
The figure 11-17 is a circuit diagram of two hand shanks, their functions are the same, but the computer plug connection is different. CD4021 is CMOS t...
The circuit shown in Figure 11-16 includes the timer and voltage-controlled oscillator. IC1 (555) and R1, RP1, R2, C2 form astable multivibrator, f = 1...
The figure as shown, 555 and R1、R2、C1 build up the astable multivibrator, the oscillation frequency is about 10KHZ, the duty cycle is nearly 50%. V...
As shown on the figure 9-16, this is an isolation circuit that change the 5v DC voltage to the 9v DC voltage. The circuit includes an oscillator,a tran...
IC adopts ambipolar time base circuit 555, its load current can reach 200mA, it can drive toy motor directly. K1, K2 are toggle switch, when the car mo...
555 IC is very popular component for timer circuit. With integrator circuit, we can extend the timing period of 555IC timer with reasonable capacitor s...
Related posts: electronic car ignition circuitDigital pedometer circuitFlashing Heartgate alarm circuit555 timer 40khz IR Oscillator Reprinted Url Of T...
This article describes a Long Time Delays with 555 Timer (N8281). The principle is very simple, very practical. The circuit components can help you und...
A multivibrator is an electronic circuit used to implement a variety of simple two-state systems such as light emitting diodes, timers and flip-flops. ...
Inside the 555 Timer You may wonder what is inside the 555 timer chip or what makes it work. Well, the 555 timer chip an Intergrated Circuit (IC) and t...
There are basic modes operation in 555:Monostable, Astable (oscilatory), and Schmitt Trigger. The following application will discuss about Monostable O...
555 timer circuits This 555timer clap switch circuit electronic project is designed using some common electronic parts . This 555 timer clap switch cir...
Common Mistakes When Using a 555 Timer Here are some mistakes to avoid: 1. Pin 7 gets connected to the 0v rail via a transistor inside the chip during ...
As shown in the figure 5-4, the 555, R2, R3 and C1 constitute a Bi-stable multi-vibrator,the frequency of the Bi-stable multi-vibrator f=1.44/ (R1+R2+2...
Basic relationshipbetween monostable model timingand timing network RaC has been shown in picture 2-3.As RaC’s time constant has various mixes, and o...
As shown on the figure 6-10, the circuit consists of the hypotension rectifying circuit，reference pulse oscillator， audio switch circuit and execut...
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