Circuit Diagram

Cable test circuit

Published:2011/4/24 21:49:00 Author:Ecco | Keyword: Cable, test circuit

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DONGFENG CITROEN Xsars cooling system(manual transmission) circuit diagram

Published:2011/4/24 21:37:00 Author:muriel | Keyword: DONGFENG CITROEN Xsars , cooling system(manual transmission)

DONGFENG CITROEN Xsars cooling system(manual transmission) circuit diagram is as shown   (View)

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DONGFENG CITROEN Xsars cooling system(automatic transmission) circuit diagram

Published:2011/4/24 21:37:00 Author:muriel | Keyword: DONGFENG CITROEN Xsars, cooling system(automatic transmission)

DONGFENG CITROEN Xsars cooling system(automatic transmission) circuit diagram is as shown   (View)

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DONGFENG CITROEN XSARA automatic transmission circuit diagram

Published:2011/4/24 20:57:00 Author:muriel | Keyword: DONGFENG CITROEN XSARA, automatic transmission

DONGFENG CITROEN XSARA automatic transmission circuit diagram is as shown   (View)

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DONGFENG CITROEN Xsars fog lamp circuit diagram

Published:2011/4/24 21:38:00 Author:muriel | Keyword: DONGFENG CITROEN Xsars , fog lamp

DONGFENG CITROEN Xsars fog lamp circuit diagram is as shown   (View)

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DONGFENG CITROEN Xsars width lamp circuit diagram

Published:2011/4/24 21:38:00 Author:muriel | Keyword: DONGFENG CITROEN Xsars, width lamp

DONGFENG CITROEN Xsars width lamp circuit diagram is as shown   (View)

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Timing doorbell circuit diagram with CW9300

Published:2011/4/21 21:40:00 Author:muriel | Keyword: Timing doorbell

Timing doorbell circuit with CW9300: As shown is Timing doorbell circuit diagram with CW9300. It has timing function, when we push the button,it will play musicforsome seconds, if we re-push the button immediately after loosing it, the doorbell will not ring either.   (View)

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Mono-stable Trigger Circuit Composed of CD4017

Published:2011/4/24 21:17:00 Author:Sue | Keyword: Mono-stable, Trigger

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Accurate Timing Circuit Used to Adjust Capacitor Tolerance

Published:2011/4/24 21:05:00 Author:Sue | Keyword: Accurate, Timing, Capacitor Tolerance

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1kHz Wien Bridge Signal Generator Circuit Composed of LM358

Published:2011/4/24 20:50:00 Author:Sue | Keyword: 1kHz Wien Bridge, Signal, Generator

As seen in the figure is 1kHz signal generator composed of components such as double operational amplifier LM358, Rl～R15, Cl～C5 and so on. The 1kHz weak signal generated from Wien Bridge(C2、C3、R4 and R6) is amplified by A1, and then is buffer amplified by operational amplifier A2 and A3. These two OPRAMs have the opposite output, making a double-end balanced output out of a single-end one.   (View)

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Electronic Tuner Circuit Composed of CC4040

Published:2011/4/22 20:30:00 Author:Sue | Keyword: Electric, Tuner,

As seen in the figure is the electronic tuner circuit. It can generate International standarded A-tone of 440Hz and can be used as tuner for band.   (View)

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Bistable Trigger Circuit Composed of CD4017

Published:2011/4/24 21:20:00 Author:Sue | Keyword: Bistable, Trigger

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Frequency Signal Trace Circuit(PLL) Composed of CD4046

Published:2011/4/24 21:02:00 Author:Sue | Keyword: Frequency Signal, Trace, (PLL)

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Multiple Sound Generator Circuit Composed of HT2880

Published:2011/4/21 23:07:00 Author:Sue | Keyword: Multiple, Sound, Generator

This circuit is able to generate 8 kinds of sounds: 2 kinds of machine guns sound, 2 kinds of bomb sound, dual-tone melody, game sound, animal sound and rifle sound. These sounds can be played by thumb-rotated switch S2 and a push-button switch. HT2880 is ROM chip of a large scale integrated circuit CMOS. In the circuit, transistor VT1 and VT2 are linked into Darlington geminate transistor to amplify signals output from the fourth terminal.   (View)

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Dark Room Time Controller Circuit Composed of 555

Published:2011/4/24 21:12:00 Author:Sue | Keyword: Dark Room, Time Controller, 555

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Homemade Simulated Gunshot Generator Circuit

Published:2011/4/22 20:27:00 Author:Sue | Keyword: Homemade, Simulated, Gunshot, Generator

Complementary audio oscillator composed of two transistors can be used as simulated gunshot generator, and the homemade gunshot is very realistic with lingering sound. As seen in the figure, the selections of components are as follows: Triode VT1,VT2: 9014, β=85-115; VT3,VT4: 9015, β=65-85. S1: AN4; S2: KN3. Light emitting diode VD1~VD6: BT201(other types can be used, but luminotrons with low forward voltage and high luminous efficiency are better). Cell GB: 4F22DC6V laminated cells. Loudspeaker BL: 8Ω 0.25W.   (View)

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Low Power Consumption Timer Circuit Composed of 555

Published:2011/4/24 21:15:00 Author:Sue | Keyword: Low Power Consumption, Timer, 555

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Long Period Connected/Disconnected Multivibrator Circuit

Published:2011/4/21 21:03:00 Author:Sue | Keyword: Long Period, Connected/Disconnected, Multivibrator

Multivibrator composed of 555 Timer IC can adjust the frequency and duty cycle separately, but when connected/disconnected period is long, a large capacitor is needed. As seen in the figure, however, without a large capacitor, adjustable connected/disconnected period can be realised, with the longest period reaching several hours. A 14-grade binary counter CD4020 is used to count the divided frequency, while the output terminals of CD4020, Q14 and Q14, are connected to R1 and R2 on the rising and falling edge, to output independent connected and disconnected period. The output terminal Q1 can be used to indicate the output of lasting periods. when R2=100k, Ton≈5minutes; when R1=1M, Toff≈50minutes.   (View)

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Mono-stable Multivibrator Circuit Composed of 74HCT221 with Variable Duty Cycle

Published:2011/4/21 20:54:00 Author:Sue | Keyword: Mono-stable, Multivibrator, Variable Duty Cycle

As seen in the figure is the mono-stable multivibrator composed of 74HCT221 with variable duty cycle. Capacitor C is charged and discharged at the same rate, with a duty cycle of 50% and its oscillatory period T equals to RC. In figure (a), R can be replaced by what in figure (b) to get othernecessary duty cycles. In this condition, C1 is charged through R1 and discharged through R2. The oscillatory period T is (R1+R2)C/2 and duty cycle equals to R1/(R1+R2) thereabout. In figure 9-11, VD1,VD2,VD3 refer to type 1N4148.   (View)

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Three phase three-wire system phase failure protection circuit

Published:2011/4/24 21:20:00 Author:Nicole | Keyword: three phase, three-wire system, phase failure

This is a three phase three-wire system power supply phase failure protection circuit, if lacking any phase of A, B, C, the optic coupler output level is lower than the reference voltage of comparator reverse-phase input terminal, comparator outputs low level, to lock PWM drive singal, cuting off the power supply. If changing the comparator input polarity, it also can use high level to lock PWM singal. This phase failure protection circuit adopts optical coupler to isolate heavy current, it is secure and reliable, RP1, RP2 is used to adjust phase failure protection motion threshold value.   (View)

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