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Index 1641

The ceiling lamp control switch circuit (2)

Published:2011/7/3 6:43:00 Author:Borg | Keyword: ceiling lamp, control switch

The ceiling lamp control switch circuit (2)
The circuit control switch that is going to be introduced here can be used to control the ceiling lamps(or fancy lamps), and it can make the ceiling lamps indicate 8 lighting states by controlling the closing times of the switches of former lights. The circuit consists of the power supply, counting/pulse distributor and the control circuit, see as the figure. Element selection All of R1~R12 are made of the 1/4W or 1/8W carbon film resistor; R13 is the 1/2W carbon resistor. All of C1～C5 are the the aluminum electrolytic resistors whose withstand voltages are 16V. (View)

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The infrared remote control switch circuit of ceiling lamps

Published:2011/7/3 6:55:00 Author:Borg | Keyword: infrared, remote control, ceiling lamps

The infrared remote control switch circuit of ceiling lamps which is to be introduced here can be used in the remote controls of domestic electric apparatus(such as TV sets, disc players and videos, etc) to turn on/off the lamps or choose the brightness of the lamps. By pressing a random key on the remote control continuously, the lights of first team are lighting, both the 1st and 2nd teams of light are ON, all the lights of 3 teams are glowing, all the lights of 3 lines are OFF, and the lamps in 1st team are lighting```the lights change in this order.The circuit consists of the power supply circuit, infrared reception circuit, counting/distributor and the control executing circuit. (View)

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The electric over-voltage relay circuit

Published:2011/7/3 7:31:00 Author:Borg | Keyword: over-voltage relay

The electric over-voltage relay circuit The circuit is simple, when the power supply voltage is over the limit value, it will take action, the power supply is cut off, which makes sure the load won't be two high. The power supply of the relay and the controllable silicon is turned into 24V by the transformer, and then rectified by D1, the relay and the controllable silicon are connected together in the parallel way. R1 and R2 are the distributing resistors, the control pole LEV can be controlled by adjusting R2, so the SCR can be conducting in the selected voltage. When the power supply voltage reaches the limit value of the SCR, the SCR is conducting. (View)

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The anti-parallel or bridge SCR trigger circuit

Published:2011/7/3 7:41:00 Author:Borg | Keyword: anti-parallel, bridge, SCR trigger

The anti-parallel or bridge SCR trigger circuit
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The multi-function time delay switch power supply outlet

Published:2011/7/3 20:16:00 Author:Borg | Keyword: multi-function, time delay switch, power supply

The multi-function time delay switch power supply outlet

Turning on or off of domestic electric apparatus and lighting lamp is often done after some delayed time, this power supply outlet can meet these needs.Working principle: see as the figure, the circuit consists of the step-down, rectifier, filter and time delay control circuit and other parts. By pressing AN, the 12V voltage is imposed on the delayer, at the moment, the 2-pin and 6-pin of NE555 are in a high LEV, and 3-pin of NE555 is outputting a low LEV, so relay K gets power, the contactor K1-1 is pulling in upward, and the delay shut outlet is getting power. (View)

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The single tube time delay pulling in relay circuit

Published:2011/7/3 20:17:00 Author:Borg | Keyword: single tube, time delay, relay circuit

The single tube time delay pulling in relay circuit
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The single key touch switch circuit

Published:2011/7/3 20:30:00 Author:Borg | Keyword: single key, touch switch

The single key touch switch circuit
Here is to introduce a single key touch switch circuit composed of CD4017, this circuit is controlled by single touch on the pole, every time it is touched, the switch will take action(ON/OFF) once, whose functions are the same with ordinary switch, and it is convenient to use.The working principle is shown in the figure, of which HD is the neon bulb of tube type, it consists of the self-made photoelectric coupler with resistor RG, and it forms the touching signal input circuit with the touch poles of M and R1. The odd input terminals Q1, Q3,Q5, Q7 and 9Q, etc, of CD4017 are connected with diodes of V2~V6, respectively. (View)

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The single tube time delay releasing relay circuit

Published:2011/7/3 20:19:00 Author:Borg | Keyword: single tube, time delay

The single tube time delay releasing relay circuit
In Figure a) is the PNP tube time delay releasing circuit In Figure a) is theNPN tube time delay releasing circuit (View)