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Index 252

Jinniu charger circuit

Published:2011/4/18 2:36:00 Author:May | Keyword: Jinniu, charger

Jinniu charger circuit
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-9～-l4.5v Collector output regulated voltage power supply circuit

Published:2011/3/22 22:59:00 Author:muriel | Keyword: -9～-l4.5v, Collector , output , regulated voltage power supply

-9～-l4.5v Collector output regulated voltage power supply circuit
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Intelligent charging typical circuit composed of ATC105 intelligent Ni-Cd battery charge control integrated circuit

Published:2011/4/18 4:40:00 Author:Nicole | Keyword: intelligent charging, Ni-Cd battery, charge control

Intelligent charging typical circuit composed of ATC105 intelligent Ni-Cd battery charge control integrated circuit
In this circuit, the best number of battery are 2~6. The battery testing input sampling resistance is CR1=4.3·(N-2)kΩ(N is the number of battery), if there are only two batteries, then CR1=0, it means this circuit at least needs two battery to charge in serie. (View)

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10～15V stabilized voltage supply circuit without auxiliary power supply

Published:2011/3/30 21:44:00 Author:may | Keyword: stabilized voltage supply, auxiliary power supply

10～15V stabilized voltage supply circuit without auxiliary power supply
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5V stabilized voltage supply circuit

Published:2011/3/30 2:28:00 Author:may | Keyword: 5V stabilized voltage supply

5V stabilized voltage supply circuit adopts voltage multiplying rectifier. (View)

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The power supply circuit diagram of 89、PWB-1362 six models color displays

Published:2011/4/17 21:48:00 Author:Ecco | Keyword: power supply , six models , color display

The power supply circuit diagram of 89、PWB-1362 six models color displays
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Computer RS-23Z serial interface current loop circuit

Published:2011/4/10 21:14:00 Author:Nicole | Keyword: computer, serial interface, current loop

Computer RS-23Z serial interface current loop circuit
This circuit is used in computer RS-232 serial interface and current loop circuit interface, it can transform voltage singal into 20mA current singal, the maximum transmission rate is 1200 bits. CCD IC1, T1 form receiver interface circuit, T2, T3 constitute transmitter interface circuit. When adds +12V, T2, T3 are conduction, the current outflows from T2 collector, and pass along the line then reach the ① of IC1, though LED of IC1, and pass along the line again then return to transmitter, the loop current is about 20mA. When adds -12V, T2, T3 cut off, there is no current in circuit. When current flows IC1 transmitter, the receiver is conduction, T1 is conduction, T1 collector sends out +12V electrical signal, when T1 cuts off, -12V electrical signal is sent to RS-232 through R4. Then to achieve use current loop to transmit digital signal. (View)

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614-B23kVA AC regulater

Published:2011/3/21 0:44:00 Author:muriel | Keyword: 614-B23kVA, AC regulater

614-B23kVA AC regulater
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2～10V precision stabilized voltage supply circuit

Published:2011/4/5 22:12:00 Author:may | Keyword: 2～10V, precision, stabilized voltage supply

2～10V precision stabilized voltage supply circuit
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Ni-Cd battery charging circuit

Published:2011/4/14 22:11:00 Author:Nicole | Keyword: Ni-Cd battery

Ni-Cd battery charging circuit
In the circuit, R1 is 10Ω, R2 is 200Ω. When the switch is up closed, the charging current is 60mA(constant current); when the switch is down closed, the charging current is 3mA(constant current). The total pressure drop of silicon diodes CR1, CR2 is 1.2V, and the Q1 emitter pressure drop is 0.6V, so the net pressure drop on R1 or R2 is 0.6V. 0.6V divided by the required charging current (using ampere), then it is the resistance of R1 or R2. LED indicates the work state of this charging circuit. (View)