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The drive circuit of bridge sensor

Published:2011/7/4 22:50:00 Author:Lucas | Keyword: drive circuit , bridge sensor

The drive circuit of bridge sensor
In the circuit, Al is the constant current output circuit, and constant value is decided by the UZ (VD1 stable voltage) and (R (RP1) + R2), and it is bridge sensor (RA-RD constitute a bridge circuit) to provide constant current bias. A2-A4 constitute an instrumentation amplifier, which can amplify the small signal output by sensor to the needed level. (View)

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The power supply circuit of bridge sensor

Published:2011/7/4 22:56:00 Author:Lucas | Keyword: power supply , bridge sensor

The power supply circuit of bridge sensor
In the circuit, the maximum input voltage of A2 is ± 10V, and the + lOV reference voltage can be got by Al, and the voltage stability is decided by the regulator diode VDI. Thus, VDl uses temperature compensated voltage regulator diode 1S2192. S1 switches A2's input voltage to get different input voltages with±10V, 5V, ± 2.5 V, ±1.25 V by connecting to different resistors. A2 is the non-inverting amplifier, and the output gets positive voltage + U. ; A3 is the inverting amplifier, and the output gets negative voltage -U. ; RP2 is used to adjust the negative output voltage. (View)

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The TV remote controller 09

Published:2011/6/14 2:49:00 Author:TaoXi | Keyword: TV, remote controller

TV remote controller 09 (View)

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The TV remote controller 10

Published:2011/6/14 2:49:00 Author:TaoXi | Keyword: TV, remote controller

TV remote controller 10 (View)

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The TV remote controller 11

Published:2011/6/14 2:49:00 Author:TaoXi | Keyword: TV, remote controller

TV remote controller 11 (View)

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The TV remote controller 12

Published:2011/6/14 2:49:00 Author:TaoXi | Keyword: TV, remote controller

TV remote controller 12 (View)

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The TV remote controller 13

Published:2011/6/14 2:49:00 Author:TaoXi | Keyword: TV, remote controller

TV remote controller 13 (View)

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The TV remote controller 20

Published:2011/6/14 2:52:00 Author:TaoXi | Keyword: TV, remote controller

TV remote controller 20 (View)

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The TV remote controller 14

Published:2011/6/14 2:49:00 Author:TaoXi | Keyword: TV, remote controller

TV remote controller 14 (View)

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The TV remote controller 15

Published:2011/6/14 2:48:00 Author:TaoXi | Keyword: TV, remote controller

TV remote controller 15 (View)

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The TV remote controller 16

Published:2011/6/14 2:48:00 Author:TaoXi | Keyword: TV, remote controller

TV remote controller 16 (View)

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The TV remote controller 17

Published:2011/6/14 2:48:00 Author:TaoXi | Keyword: TV, remote controller

TV remote controller 17 (View)

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The thyristor trigger circuit composed of photocoupler

Published:2011/7/5 3:57:00 Author:Lucas | Keyword: thyristor , trigger circuit , photocoupler

The thyristor trigger circuit composed of photocoupler

2-5 (a) is a half-wave circuit. Power supply can provide trigger current for the VSl by resistor R1 and transistor in the PC. The circuit is designed to limit Rl power to be as small as possible, and the current conduction angle controlling range shoule be as large as possible. VDl makes the power consumption of Rl halve, VD2 is used to limit the PC collector transistor cut-off voltage. Figure 2-5 (b) is a full-wave power. Figure 2-5 (c) is the circuit using accumulation of energy capacitor. Figure 2-5 (d) is the wide triggering pulse circuit. Trigger pulse width is lms, which can significantly reduce the power consumption of Rl and capacity of Cl. (View)