Circuit Diagram

TV lightning protection circuit diagram

Published:2011/9/25 21:29:00 Author:Ecco | Keyword: TV lightning protection

If you watch TV in thunderstorm days, lightning will damage the TV tuner by outdoor antenna. If you install the varistor in outdoor antenna, it may play a role on lightning protection. TV lightning protection circuit is shown as the chart, varistors can connect directly with the earth.   (View)

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Double-tube single-resistance independent circuit diagram

Published:2011/9/25 21:06:00 Author:Ecco | Keyword: Double-tube, single-resistance , independent

The main varieties of resistance transistor is a small power tube, which is widely used in household appliances and other electronic devices for electronic switch or inverter. Some band-stop tube containing two transistors, leads 5-6 feet.   (View)

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Rectifier over-current protection circuit diagram

Published:2011/9/25 21:36:00 Author:Ecco | Keyword: Rectifier , over-current protection

As the voltage fluctuations or man-made distribution incidents often make the power grid generate surge over-voltage phenomenon, then the electronic equipments and power transformer rectifier circuit will be damaged. If varistor is connected to the input end of rectifier diodes and power transformer to play a protective role. The circuit is shown as the chart.   (View)

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The communication conversion circuit diagram between RS232 and RS485

Published:2011/9/18 21:32:00 Author:Ecco | Keyword: communication conversion

1. The circuit diagram is the combination of the communication conversion circuit between the RS48 and RS232, RS232 and TTL level (UART) serial converter circuit. 2. This circuit is basically proven, and some RS232-TTL's speed is up to 57.6KB / s. ADM483 requires +5V power supply, as the 78L05's efficiencyis not high. The serial get-power capacity is limited, and the output power has not reach 5V. It suggests that 485 chip uses 3.3V power supply.   (View)

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Using real USB chip and the ISP2 of M8

Published:2011/9/18 21:23:00 Author:Ecco | Keyword: Real, USB chip, ISP2

  (View)

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DIY computer infrared interface

Published:2011/9/18 22:32:00 Author:Ecco | Keyword: DIY, computer, infrared interface

A, B are 2 common contact, outline drawing and pin definition. C is the infrared emission tube shape, pin definition and schematic symbol. CD4069 is the pin definition of inverter pin, and F is the 9013 transistor shape, pin definitions and symbol.   (View)

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Computer controlling home appliance switch 2

Published:2011/8/2 1:20:00 Author:Ecco | Keyword: Computer controlling , home appliance switch

  (View)

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The circuit and sound code of AT89C2051 driving stepping motor

Published:2011/8/2 1:19:00 Author:Ecco | Keyword: sound code, driving stepping motor

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TMS320LF2407DSP Typical customers board principle diagram(PROTEL99 principle diagram)

Published:2011/8/2 1:18:00 Author:Ecco | Keyword: Typical, customers board

  (View)

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A watchdog circuit

Published:2011/9/19 1:14:00 Author:Ecco | Keyword: watchdog , circuit

The circuit is shown as above: when the circuit works, it needs to add the reset pulse to the CD4060 regularly, we can guarantee Q1 being in cutting off state, so that the tube controlled by the NMOS will be in conduction state to provide power to the processor circuitry. The circuit has the advantages of long timing time with over a few minutes; you can take a long time to initialize the system. The power passing R2, C1, R3 automatically provides a reset pulse to the counter to ensure that there is output of Vout. The circuit costs low. The biggest drawback of the circuit is feeding dog pulse requires wide band.   (View)

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Single-supply transforming into positive and negative dual power supply circuit

Published:2011/9/13 1:15:00 Author:Rebekka | Keyword: Single-supply transforming , positive and negative , dual power supply

In the circuit, VD1 is used to compensate the UBE temperature characteristics of VT3. TPS60403 integrated chip can change the input voltage +1.4 ~ +5.5 V into a negative voltage. And output positive and negative voltageare established at the same time. The circuit is used for battery-powered electronic devices.   (View)

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Beijing Cherokee light off-road vehicle voltage regulator adjustment parameter circuit diagram

Published:2011/9/13 1:23:00 Author:Rebekka | Keyword: Beijing Cherokee, light off-road vehicle, adjustment parameter

When the obtained voltage of IC is higher than the reference voltage provided by HMO5, IC circuit flips and outputs a low voltage to cut off switch tube DMO5. The magnetic field current is cut off. The alternator voltage drops; When the voltage falls below the given value, DMO5 will be turned on again, field current increases, the generator voltage increases as well. Repeatedly adjusting the generator voltagewill keep it in the specified scope. Table 1 shows the voltage regulator adjusting parameters.   (View)

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Beijing Cherokee 2.5 L and 4.0 L engine control system PC pins arranging position circuit diagram

Published:2011/9/13 1:22:00 Author:Rebekka | Keyword: Beijing Cherokee , engine control system , PC pins arranging position

  (View)

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Beijing Cherokee light off-road vehicle fuel injection toggle machine connector terminal wiring explanation circuit

Published:2011/9/13 1:20:00 Author:Rebekka | Keyword: Beijing Cherokee , light off-road vehicle , fuel injection , toggle machine , connector terminal, wiring explanation

Beijing Cherokee light off-road vehicle toggle machine brain connectors fuel injection terminal wiring explanation circuit diagram.   (View)

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Beijing Cherokee light off-road vehicle 2.5L engine electric controlling fuel injector and computer wiring diagram

Published:2011/9/13 2:07:00 Author:Rebekka | Keyword: Beijing Cherokee light off-road vehicle, 2.5L engine , electric controlling, fuel injector , computer wiring injector

Beijing Cherokee light off-road vehicle 2.5L engine control system and computer wiring injector circuit diagram.   (View)

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Beijing Cherokee light off-road 2.5L engine electric control sensor circuit diagram 2

Published:2011/8/31 2:29:00 Author:Rebekka | Keyword: Beijing Cherokee , light off-road , 2.5L engine , electric control sensor

Beijing Cherokee light off-road vehicle 2.5L engine electric control sensor and computer connecting wiring circuit diagram.   (View)

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PCD3321P powder micro PC dial-up circuit diagram

Published:2011/9/13 2:04:00 Author:Rebekka | Keyword: powder micro PC dial-up circuit

PCD3321P is a micro-computer dial-up circuit produced by Philips of the Netherlands. It is suitable for communications equipment dial-up. PCD3321P integrated circuit includes pulse dialing generation circuit, keyboard switches, squelch such encoding and decoding circuits. The IC uses 18 pins dual in-line package, the integrated circuit pin functions and data are listed in Table 1.   (View)

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Beijing Cherokee light off-road vehicle fuel injection engine computer and sensor circuit diagram

Published:2011/9/13 1:47:00 Author:Rebekka | Keyword: Beijing Cherokee light off-road vehicle,

l-absolute pressure sensor bracket (four-cylinder machine or six-cylinder machine); 2-oxygen sensor (four-cylinder, six-cylinder); 3-stent (six-cylinder machines); 4-absolute pressure sensor; 5- bolt; 6-nut; 7-screw; 8-clamp; 9-nut; 10-sensor; 11-computer; 12- screw; 13-computer cable connector's (line bundles) Computer Part Number: 91-four-cylinder machine 56026771; 92- four-cylinder machine 56027392; 93-four-cylinder machine 56027352; 91- six-cylinder machine 56027532; 92- six-cylinder machine 56027396; 93- six-cylinder machine 56027356   (View)

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PCD331OAP 1OA microcomputer dialing IC diagram

Published:2011/8/31 2:43:00 Author:Rebekka | Keyword: 1OA , microcomputer dialing IC

PCD331OAP/1OA series microcomputer dial-up integrated circuit system is widely used in a variety of telephones. PCD331OAP/1OA integrated circuit uses double row 20 pin packages, the pin functions are listed in Table 1.   (View)

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PCD3310P microcomputer dial IC diagram

Published:2011/8/31 2:42:00 Author:Rebekka | Keyword: microcomputer dial IC

PCD3310 / P series microcomputer dial integrated circuits are used in the communication of a variety of electronic electrical and mechanical chanting. PCD3310 / P integrated circuit includes pulse / tone compatible dialing, key switch signal encoding and decoding and squelch circuits. The integrated circuit pin functions and data are listed in table 1.   (View)

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