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Index 1742

The TV video amplifier circuit (1)

Published:2011/6/19 20:51:00 Author:qqtang | Keyword: video amplifier

The TV video amplifier circuit (1) is shown in the figure. (View)

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The DEMO-80110NE circuit

Published:2011/6/19 20:50:00 Author:qqtang | Keyword: circuit

The DEMO-80110NE circuit
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The DEMO-80110NE module pin circuit

Published:2011/6/19 20:49:00 Author:qqtang | Keyword: module pin circuit

The DEMO-80110NE module pin circuit
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The relay circuit modified from electric fans

Published:2011/6/19 20:49:00 Author:qqtang | Keyword: relay circuit, electric fans

The relay circuit modified from electric fans
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The 1～20MHz clock mixer circuit

Published:2011/6/19 21:31:00 Author:qqtang | Keyword: clock mixer

In the figure is the 1～20MHz clock mixer circuit which can generate precise clock signals. UoA outputs the 1～20MHz signal whose resolution ratio is 100KHz, but UoB and UoC output signals whose frequency is 1/10 of the former. If the input signal Ui is 10KHz, which is got by splitting the crystal circuit, then the precision is the same as the crystal oscillator. (View)

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The key ring wireless encoding remote controller circuit (1)

Published:2011/6/19 21:33:00 Author:qqtang | Keyword: key ring, wireless encoding, remote controller

The key ring wireless encoding remote controller circuit (1)
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The MB1570 circuit

Published:2011/6/19 21:38:00 Author:qqtang | Keyword: circuit

In the figure is the example of the MB1570 circuit, which is a Pl－I mixer integrated circuit, and the band width is 26Hz. (View)

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The audio inductance wireless headphone circuit

Published:2011/6/19 21:39:00 Author:qqtang | Keyword: audio inductance, wireless headphone

The audio inductance wireless headphone circuit is shown in the figure. (View)

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The 6l6 single terminal headphone amplifier circuit

Published:2011/6/19 21:40:00 Author:qqtang | Keyword: single terminal, headphone amplifier

The 6l6 single terminal headphone amplifier circuit is shown in the figure. (View)

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The portable high-speed light pulse generating circuit

Published:2011/6/19 21:42:00 Author:qqtang | Keyword: high-speed, light pulse

The portable high-speed light pulse generating circuit
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The TC1 vacuum pipe headphone power amplifier circuit

Published:2011/6/19 21:44:00 Author:qqtang | Keyword: vacuum pipe, headphone, power amplifier

The TC1 vacuum pipe headphone power amplifier circuit is shown in the figure. (View)

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The auto charging motor circuit

Published:2011/6/19 21:45:00 Author:qqtang | Keyword: charging motor

The auto charging motor circuit
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The principle diagram of the bus non-contact IC reader/writer circuit

Published:2011/6/19 21:48:00 Author:qqtang | Keyword: principle diagram, non-contact IC

The principle diagram of the bus non-contact IC reader/writer circuit
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The headphone amplifier circuit composed of the dual op-amp (OPA2604, et al)

Published:2011/6/19 21:53:00 Author:qqtang | Keyword: headphone amplifier, dual op-amp

The headphone amplifier circuit composed of the dual op-amp (OPA2604, et al) is shown in the figure. (View)

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The ZEN headphone amplifier circuit

Published:2011/6/19 21:50:00 Author:qqtang | Keyword: headphone, amplifier circuit

The ZEN headphone amplifier circuit is shown in the figure. (View)

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The low-voltage 60min timing circuit

Published:2011/6/19 22:41:00 Author:qqtang | Keyword: low-voltage, timing circuit

The low-voltage 60min timing circuit
In the circuit, TC9l60 is the timer integrated circuit, in the chip there is an oscillating circuit and 20-bit binary counter, the maximum timing is 60min, the oscillating frequency is 1KHz. The timer resistance RT is higher than 20OkΩ. According to C2≤1/(2．2fcRt), if C2 is 1800pF, then Rt＝216.76kΩ, which is serially connected with R2. The output is the leakage pole open type, OUT1～4 is graded every 15min, and it stops when the timing is over, by this moment, the power consumption is only 1μA. (View)

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The The wide band reacting adjuster 1B31 circuit of motivated voltage rising

Published:2011/6/19 22:31:00 Author:qqtang | Keyword: wide band, reacting adjuster, motivated voltage

The The wide band reacting adjuster 1B31 circuit of motivated voltage rising

When the 19-pin of wide band reacting adjuster 1B31 touches the 20-pin, the programmable electric bridge motivation source outputs a voltage of UEXC=+10V. To rise UEXC to +10～+15V, we must fix a resistor REXT between EXC ADJ and SENSE, the circuit is shown in the figure. The REXT value is decided by the following formula (the unit of the resistance is kΩ): of which: (View)

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The (wide band reacting adjuster 1B31) circuit of motivated voltage lessening

Published:2011/6/19 22:23:00 Author:qqtang | Keyword: wide band, reacting adjuster, motivated voltage

The (wide band reacting adjuster 1B31) circuit of motivated voltage lessening
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The U6046B timer application circuit

Published:2011/6/19 22:17:00 Author:qqtang | Keyword: timer, application circuit

In figure 5-22 is the U6046B timer application circuit. U6046B is the long-time limiting timer integrated chip, which is in 8-pin DIP package, the timing span is from 3.7s to 20h, the power supply voltage is from 6~18v. In figure 5-22 (a) is the single stable timing circuit composed of U6046B, the working voltage +Ucc is added on 8-pin after being limited by R1 and filtered by C1, then there generates a 5.2V stable ouput voltage on 7-pin of U6046B and the voltage is the input of 3-pin, so that U6046B is started. The sucker current on 2-pin makes the relay K close, the timing td is started. (View)