Circuit Diagram

Accurate FM tuning indicator circuit

Published:2011/5/20 2:44:00 Author:Christina | Keyword: Accurate, FM, tuning, indicating circuit

This indicator can prompt the tuning state by adjusting the discriminator's DC output to zero. The key point of the circuit debugging is the T1's operating point, you can use the millvolt meter to oversee the DC output, to adjust the receiver to the FM radio station, then change R2 to make D3 in the brightest state.   (View)

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The Infrared Demodulation Circuit Using Low-Noise Amplifier

Published:2011/5/22 4:13:00 Author:Robert | Keyword: Infrared, Demodulation, Low-Noise, Amplifier

This circuit uses the HgCdTe demodulation device which can be cooled to 77K in liquid nitrogen. It uses a constant current bias for the demodulation device which is connected to the input port. The voltage's amplification factor is 200 and the bandwidth is above 1MHz. The noise factor is 1.5dB when use the typical demodulation device. This circuit uses two referenced voltage source to prevent the influence on the collector pole's current of transistor TR2 and TR4 by the change of power supply's voltage.   (View)

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Pulse Electronic Fishing Device Circuit

Published:2011/5/21 0:58:00 Author:Robert | Keyword: Pulse, Electronic, Fishing Device

For the pulse electronic fishing device, the primary coil uses the 2.5 copper wire to reel 60 cycles. The secondary coil uses the 1.5 copper wire to reel 160 cycles with the opposite direction and connect to the negative pole. The primary 20 cycles' coil contactor is connected with some small heat-sinking capacitances which could use two 30uF 600V capacitance in parallel.   (View)

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Beijing Wuzhou elevator control circuit (2)

Published:2011/5/19 8:36:00 Author:TaoXi | Keyword: Beijing Wuzhou, elevator, control circuit

Beijing Wuzhou elevator control circuit (2)   (View)

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Beijing Wuzhou elevator control circuit (1)

Published:2011/5/19 8:36:00 Author:TaoXi | Keyword: Beijing Wuzhou, elevator, control circuit

Beijing Wuzhou elevator control circuit (1)   (View)

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Beijing Wuzhou elevator safety loop and band-type brake circuit

Published:2011/5/19 8:39:00 Author:TaoXi | Keyword: Beijing Wuzhou, elevator, safety loop, band-type brake

Beijing Wuzhou elevator safety loop and band-type brake circuit   (View)

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Toshiba CV60 elevator control power supply circuit

Published:2011/5/19 8:52:00 Author:TaoXi | Keyword: Toshiba, elevator, control power supply

Toshiba CV60 elevator control power supply circuit   (View)

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Toshiba CV60 elevator band-type braking circuit

Published:2011/5/19 8:52:00 Author:TaoXi | Keyword: Toshiba, elevator, band-type braking circuit

Toshiba CV60 elevator band-type braking circuit   (View)

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Toshiba CV60 (9.5～18.5kW) elevator main circuit

Published:2011/5/19 8:53:00 Author:TaoXi | Keyword: Toshiba, elevator, main circuit

Toshiba CV60 (9.5～18.5kW) elevator main circuit   (View)

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TV remote controller 04

Published:2011/5/19 8:14:00 Author:TaoXi | Keyword: TV, remote controller

TV remote controller 04   (View)

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TV remote controller 06

Published:2011/5/19 8:13:00 Author:TaoXi | Keyword: TV, remote controller

TV remote controller 06   (View)

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TV remote controller 09

Published:2011/5/19 8:12:00 Author:TaoXi | Keyword: TV, remote controller

TV remote controller 09   (View)

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TV remote controller 18

Published:2011/5/19 8:05:00 Author:TaoXi | Keyword: TV, remote controller

TV remote controller 18   (View)

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TV remote controller 17

Published:2011/5/19 8:05:00 Author:TaoXi | Keyword: TV, remote controller

TV remote controller 17   (View)

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TV remote controller 16

Published:2011/5/19 8:08:00 Author:TaoXi | Keyword: TV, remote controller

TV remote controller 16   (View)

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TV remote controller 15

Published:2011/5/19 8:08:00 Author:TaoXi | Keyword: TV, remote controller

TV remote controller 15   (View)

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TV remote controller 12

Published:2011/5/19 8:10:00 Author:TaoXi | Keyword: TV, remote controller

TV remote controller 13   (View)

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TV remote controller 13

Published:2011/5/19 8:10:00 Author:TaoXi | Keyword: TV, remote controller

TV remote controller 13   (View)

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TV remote controller 14

Published:2011/5/19 8:09:00 Author:TaoXi | Keyword: TV, remote controller

TV remote controller 14   (View)

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ultra warm monitor wireless alarm system

Published:2011/5/19 10:04:00 Author:Lena | Keyword: ultra warm, wireless alarm system

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