Circuit Diagram

color display PGS HX-12 type power supply circuit

Published:2011/6/5 3:52:00 Author:John | Keyword: color display

Color display PGS HX-12 type power supply circuit is shown in the following.   (View)

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MAX232 connection circuit

Published:2011/6/5 3:48:00 Author:John

MAX232 connection circuit is shown below.   (View)

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display VGA V-1412 type power supply circuit

Published:2011/6/5 3:47:00 Author:John | Keyword: display

Display VGA V-1412 type power supply circuit is shown below.   (View)

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display TYSTAR TY-1412 type power supply circuit

Published:2011/6/5 3:46:00 Author:John | Keyword: display

Display TYSTAR TY-1412 type power supply circuit is shown below.   (View)

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TYSTAR TY-1411 type display power supply circuit

Published:2011/6/5 3:30:00 Author:John | Keyword: display

TYSTAR TY-1411 type display power supply circuit is shown below.   (View)

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PCON CN-1402 type SVGA color display power supply circuit

Published:2011/6/5 3:27:00 Author:John | Keyword: color display

TOPCON CN-1402 type SVGA color display power supply circuit is shown below.   (View)

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OPCON CN-1405 type display power supply circuit

Published:2011/6/5 3:28:00 Author:John | Keyword: display

OPCON CN-1405 type display power supply circuit is shown below.   (View)

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Touch socket circuit

Published:2011/6/8 6:57:00 Author:Christina | Keyword: Touch, socket

The circuit is as shown in the figure, when your finger touches the sheetmetal S, the neon tube N lights, the photoelectric coupler which is composed of the N and the photoconductive resistance RG to decrease the resistance of RG, the two-way thyristor VS gets enough trigger current to conduct, so the load of the socket CZ gets power to work. At the same time, the 220V AC voltage of CZ is reduced by the capacitance C2, then is rectified by the diodes VD1 and VD2, and this AC voltage is also regulated by the regulator tube VDW and filtered by the capacitance C1, at last it changes into the DC voltage and adds to the VS's control port through the resistance R2, so even the finger has left, VS is still in the conduction state to keep the load working normal.   (View)

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MC45162 programmable phase-locked loop frequency synthesis modulation and demodulation integrated circuit

Published:2011/6/8 22:32:00 Author:Christina | Keyword: programmable, phase-locked loop, frequency synthesis, modulation, demodulation, integrated circuit

The MC45162 is designed as one kind of programmable phase-locked loop frequency synthesis modulation and demodulation integrated circuit that is produced by the MOTOROLA company, it can be used in the communication equipments. 1.Pin functions The MC45162 is in the 16-pin double-row DIP package, the letter code and the pin functions are as shown in the table. 2.Typical application circuit The typical application circuit of the modulation circuit which is composed of the MC45162 is as shown in the figure. The letter code and the pin functions of the MC45162   (View)

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Light control relay circuit

Published:2011/6/8 7:03:00 Author:Christina | Keyword: Light control, relay

Use the photoconductive resistance as the photoelectric switch circuit, the sensitivity of it is very high, the light control relay circuit is as shown. When the illumination intensity is low, the VT will not conduct; when there is a certain illumination intensity, the resistance of the photoconductive resistance will be small, VT gets enough base current to conduct, so it produces the large collector current to close the relay.   (View)

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Light control timing switch circuit

Published:2011/6/8 7:11:00 Author:Christina | Keyword: Light control, timing, switch

The Mexico light control timing switch circuit is as shown in the figure, this circuit can be used to control the outdoor lamps and the power supply of the advertisement lightbox, it is one kind of products that combined with the light control function and the gear shifting timing function, this circuit is very simple and easy to make. Turn the rotary switch to the timing gear of 2h, 4h, 6h or 8h, when there is no light, this circuit will automaticly control the corresponding time to reach the purposes of energy-saving and energy consumption reducing.   (View)

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MH8822 fan single chip computer control integrated circuit

Published:2011/6/8 22:20:00 Author:Christina | Keyword: fan, single chip, computer control, integrated circuit

The MH8822 is designed as one kind of fan single chip computer control integrated circuit, it can be used in the control systems of all kind of fans such as the Great Wall series remote control fan.etc. 1.Features The MH8822 integrated circuit is composed of the clock oscillating circuit, the reset circuit, the button switch instruction decoding circuit, the fan motor speed control circuit, the working condition and timing time indicator light display driver circuit, the buzzer driving circuit, the sync signal processing circuit and the remote control signal processing circuit.etc. 2.Pin functions and data The MH8822 integrated circuit is in the 28-pin double-row DIP package, the pin functions and data is as shown in the table. The pin-5 functions and data of the MH8822 integrated circuit 3.Typical application circuit The typical application circuit of the fan control system which is composed of the MH8822 integrated circuit is as shown in the figure.   (View)

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Novel door light switch circuit

Published:2011/6/8 7:20:00 Author:Christina | Keyword: Novel, door light, switch

The door light switch that is installed outside the door is always opened and closed by other people, so it is very easy to be damaged, therefore we make the novel door light switch. This door light switch is the knock type, and it has the function of doorbell. The circuit is as shown in the figure, it is composed of the knock detection circuit, the door light trigger and delay control circuit, the doorbell circuit and the power supply circuit.etc. The F1～F4 use the CD4093 digital integrated circuit. The music integrated circuit uses the KD-156. The VT1 and VT2 use the audion SC9014; the VT3 uses the audion SC9013; the VT4 uses the 2SC9012; the VT5 uses the 2SC8050.   (View)

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Delay energy-saving light circuit

Published:2011/6/8 8:07:00 Author:Christina | Keyword: Delay, energy-saving, light

The delay energy-saving light circuit is as shown, this device is designed as one kind of sound and light double control delay energy-saving light. The bridge rectifier circuit is composed of the diodes VD1～VD4 and this circuit changes the city electricity into the pulse DC current, this DC current is limited by R7, regulated by VD5 and is filtered by C3, at last it becomes the 8V direct current to supply power for the integrated block CD4011 and the audion VT7. Components selection: the NAND gates D1～D4 can use the 2 input ports four NAND gates CD4011 digital integrated circuit. VS is the MCR100-8 type small plastic one-way thyristor. The rectifier diodes VD1--VD4 can use the 1N4007 type ordinary silicon rectifier diodes, the VD5 uses the 2CW56 type 8V zener diode, the VD6 can use the 1N4148 type ordinary silicon switch diode, the VT7 can use the 9013 type NPN transistor.   (View)

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blackout floodlight circuit

Published:2011/6/8 8:18:00 Author:Christina | Keyword: blackout , floodlight

When the children are studying at night, once the blackout, the children can see nothing in the study room, it is not safe. The blackout floodlight circuit which is composed of the light-emitting diode can solve this problem. This light uses the batteries as the power supply, the power consumption is very small, you can put it on the top of the desk, if it is blackout, the light-emitting diodes will turn on automaticly to supply strong enough light, so the children can walk out of the room. In order to reduce the power consumption, the LEDs use the flash illumination mode. The IC1 uses the CMOS integrated circuit CD4093. The VT1 and VT2 use the audion BC547. The LED1 uses the Φ8mm white light-emitting diode, the other components are as shown in the figure.   (View)

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Long delay light control switch circuit

Published:2011/6/8 8:33:00 Author:Christina | Keyword: Long delay, light control, switch

The second generation sound and light control switch is as shown in the figure, the delay time is extended to about 3 minutes, so that it can satisfly meet the requirements of users, and if you want to extend the delay time when you are using it, you just need to send out any sound when the bulb is flashing. Components selection: the IC1 uses the double-input Four NAND gates TC4011. The RG is the photoresistor, the larger the difference between the light resistance value and the dark resistance value, the effect is better. The resistance uses the 1/8W carbon membrane resistance. The electrolytic capacitor voltage is 16V, C6 uses the electrolytic capacitor with good performance and large leakage resistance value.   (View)

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Sound control delay desk lamp circuit

Published:2011/6/8 8:43:00 Author:Christina | Keyword: Sound control, delay, desk lamp

The telephone desk lamp is as shown in the figure, when the telephone rings or off-hook at night, the light will turns on automaticly, after you hang up the telephone, the light will turn off in 45 seconds. In peacetime this telephone desk lamp can be used as the general dimming desk lamp, and it does not need the light switch. When this telephone desk lamp is used as the delay lamp, you just need to touch the delay button, this lamp will turns off in after 45 seconds. This circuit has multi-purpose, and it is composed of the optocoupler circuit, the light control circuit, the negative pulse generating circuit, the monostable trigger circuit, the thyristor switching circuit and the power supply circuit.   (View)

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Circuit principle gas furnace flameout alarm circuit

Published:2011/6/8 8:56:00 Author:Christina | Keyword: Circuit, principle, gas furnace, flameout, alarm

Although some advanced gas furnaces have the automatic flameout protection device, but the price is too high so they are difficult to popularize. The gas furnace flameout alarm circuit is as shown in the figure, this circuit can monitor the gas furnace and alarm. The circuit's core device is the LM324 quad op amp. The IC1-1 is used as the comparator, the IC1-2 is used as the follower; the R4 and R5 are the photoresistor, the resistance changes with the light intensity; AN is the reset switch, AN can be used to discharge the electric charges of capacitance C1 and C2; when you are using it, you need to aim the photoconductive resistance R4 at the flame, then turn the adjusting knob to make the alarm will not alarm. If you use your hand to keep out the flame, the alarm will alarm. This circuit uses the 9V lapped battery.   (View)

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Money detector circuit

Published:2011/6/8 9:00:00 Author:Christina | Keyword: Money, detector

This voice alarm money detector circuit can be used to identify the counterfeit currency, it uses the sound of Please note that this is the counterfeit currency to remind the user, the internal circuit is as shown in the figure. It is composed of the magnetic trace detection circuit, the watermark detection circuit, the fluorescence instruction circuit, the power supply circuit and the voice alarm circuit.etc.   (View)

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Wireless alarm circuit with multiple detection heads

Published:2011/6/8 18:55:00 Author:Christina | Keyword: Wireless, alarm, multiple, detection heads

This alarm device separates the detection part and the alarm part, one alarm has multiple detection heads, the detection part and the alarm part use the radio waves to communicate. It has the wireless alarm receiving part and the wireless alarm test launch part. The wireless alarm receiving part is composed of the 315MHz wireless data receiving module, the decoder integrated circuit PT2272-M4, the monostable circuit and the audio generator. The circuit is as shown in the figure. The wireless alarm test launch part has some detection circuits. (1)The launch circuit which is composed of the photoconductive resistances: (3) magnetic induction transmitter circuit:   (View)

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