Circuit Diagram

Separate-excited Crossed Oscillator Used in Quad Cycled Lights Controller Circuit

Published:2011/4/21 20:01:00 Author:Sue | Keyword: Separate-excited, Crossed, Oscillator, Quad Cycled Lights Controller

As seen in the figure is the separate-excited crossed oscillator used quad cycled colored lights controller circuit. In this circuit, the quad cycled colored lights can be controlled by only two single contact relays 4088. The operation principle is: The separated-excited crossed oscillatory circuit composed of IC1 6 NOT gate CD4069 and C1,C2,R1,R2 has a direct control over crystal triode VT1 and VT2. The driving relay K1 and K2 realise the crossed split-phase output, that is after K1 is connected, K2 will be connected, then K2 is cut off after K1 is cut off, and this process makes a circle. In this figure, (b) is the connection diagram of colored lights.   (View)

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Self-excited Multivibrator Circuit Composed of CC4093

Published:2011/4/21 21:01:00 Author:Sue | Keyword: Self-excited, Multivibrator

When the multivibrator is composed of Schmitt trigger, only a resistance and a capacitor need to be circumscribed. This circuit is designed for the low frequency oscillator with controllable oscillation and less demand on accuracy. As seen in the figure is the self-excited multivibrator composed of Schmitt trigger CC4093 with 4-2 imput. As to the waveform, see the figure below:   (View)

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Circuit of Self-excited Multivibrator to Improve Waveform and Stability

Published:2011/4/20 21:49:00 Author:Sue | Keyword: Self-excited, Multivibrator, Waveform, Stability

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Timer circuit with Miller integrator

Published:2011/4/24 21:30:00 Author:Nicole | Keyword: timer, Miller integrator

Miller integrator's negative feedback is connected from transistor collector to its base by capacitance. It adopts composite pipe to improve the current amplification. After pressing key T, the capacitance is charged to power voltage. The time constant of this process is 33ms. Relay is no delay pull-in. When the key is cut off, Miller integrator starts to work.   (View)

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Circuit of Multivibrator Composed of Integrated Circuit 555

Published:2011/4/20 21:48:00 Author:Sue | Keyword: Multivibrator, Integrated, 555

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PLL Pulse Generator(74HC4060、TC9122P) Circuit

Published:2011/4/21 19:56:00 Author:Sue | Keyword: PLL, Pulse, Generator, 74HC4060, TC9122P

As shown in the figure is Phase-Locked Loop(PLL) pulse generating circuit. When PLL divides crystal oscillator, the 1kHz signal gained can be used as the step frequency,and there will be pulse waveforms of 10kHz 999kHz at the end of output. The 74HC4060 integrated block is an integrated chip with NOR gates and 1/2n dividing circuit inside. And the NOR gate and crystal oscillator with a frequency of 4.096MHz will constitute an oscillatory circuit, while dividing circuit gets the basic frequency signal of 1kHz by dividing it. TC9122P is a high-speed programmable counter whose dividing frequency is decided by code BCD. The program-based range of divding frequency ratio is 8-999,and this circuit works on the range of 10-999. Inside 74HC4060 there are 3 kinds of phase comparators, one of which,comarators PC2, controls the feedback by comparing the output frequency with the basic frequency. VC0's oscillator frequency is decided by Cx, R1 andR2. The minimum andmaximum frequencies are: fmin=1/R2(Cx+32pF) , fmax=1/R1(Cx+32pF)   (View)

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Negative Timing Pulse Generator(555) Circuit with Two-way Output

Published:2011/4/20 21:44:00 Author:Sue | Keyword: Negative, Timing, Pulse, Generator, Two-Way, 555

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Zero Symmetric Bidirectional Pulse Wave Generator Circuit

Published:2011/4/20 21:42:00 Author:Sue | Keyword: Zero Symmetric, Bidirectional, Pulse Wave, Generator

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Pulser Generator Circuit Composed of CC4516 with Controlled Pulsewidth

Published:2011/4/20 21:39:00 Author:Sue | Keyword: Pulse, Generator, Controlled Pulsewidth

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Quantitative Pulse Generator Circuit

Published:2011/4/20 21:35:00 Author:Sue | Keyword: Quantitative, Pulse, Generator

This circuit is mainly used to control the amount of rotation of step electric motors. The joint angle of a step electric motor is subject to the number of pulses input by the circular distributor. In this circuit, the quantitative pulses can be set to 999 at most in a random manner.   (View)

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1/86400Hz Pulse Generator Circuit

Published:2011/4/22 21:40:00 Author:Sue | Keyword: Pulse, Generator, 1/86400Hz

As illustrated, in the circuit it is able to input a clock pulse of 1Hz every 24 hours, which can be generated by digital clock. It can offer the a.m. or p.m. instructions for those without this function, or to be used to preset the date of digital calendars. Also it can serve as a reliable alarm trigger at a particular time.   (View)

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Zastava CA7200E3(L) type lighting and signalling system circuit diagram

Published:2011/4/24 21:23:00 Author:muriel | Keyword: Zastava, lighting and signalling system

Zastava CA7200E3(L) type lighting and signalling system circuit diagram is as shown   (View)

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Zastava CA7200E3(L) type instrument and signalling system circuit diagram

Published:2011/4/24 21:26:00 Author:muriel | Keyword: Zastava, instrument and signalling system

Zastava CA7200E3(L) type instrument and signalling system circuit diagram is as shown   (View)

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Zastava CA7200E3(L) type radio cassette player and center gate lock system circuit diagram

Published:2011/4/24 21:22:00 Author:muriel | Keyword: Zastava , radio cassette player, center gate lock system

Zastava CA7200E3(L) type radio cassette player and center gate lock system circuit diagram is as shown   (View)

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Zastava CA7200E3(L) type buzzer, indoor light and cigar lighter circuit diagram

Published:2011/4/24 21:20:00 Author:muriel | Keyword: Zastava , buzzer, indoor light, cigar lighter

Zastava CA7200E3(L) type buzzer, indoor light and cigar lighter circuit diagram is as shown   (View)

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SST89C58 Electronic plate circuit and code

Published:2011/4/24 20:42:00 Author:Ecco | Keyword: Electronic plate , code

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The DIY information of SIMMAX on GSM mobile phone

Published:2011/4/24 21:16:00 Author:Ecco | Keyword: DIY information , SIMMAX , GSM mobile phone

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DONGFENG CITROEN XSARA starter and generator(manual transmission) circuit diagram

Published:2011/4/24 21:07:00 Author:muriel | Keyword: DONGFENG CITROEN XSARA, starter, generator(manual transmission)

DONGFENG CITROEN XSARA starter and generator(manual transmission) circuit diagram is as shown   (View)

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Zastava CA7200E3(L) type center gate lock system(one) circuit diagram

Published:2011/4/24 21:18:00 Author:muriel | Keyword: Zastava , center gate lock system

Zastava CA7200E3(L) type center gate lock system circuit diagram is as shown   (View)

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Zastava CA7200E3(L) type engine fuel injection system (one) circuit diagram

Published:2011/4/24 21:11:00 Author:muriel | Keyword: Zastava, engine fuel injection system

Zastava CA7200E3(L) type engine fuel injection system (one) circuit diagram is as shown   (View)

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