Circuit Diagram

EW-8W electronic ballast circuit diagram

Published:2011/7/1 1:18:00 Author:Ecco | Keyword: electronic ballast

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Microwave radar automatic lamp circuit(4)(TWH9250)

Published:2011/7/1 1:14:00 Author:zj | Keyword: Microwave radar automatic lamp circuit(4)(TWH9250), TWH9250, LM7812

(a) Microwave radar automatic lamp circuit(4) (b) TWH9250 microwave module As the diagram shows,the annular antenna can use Φ1~3mm enameled wire to bend to circle andto connect to X,Y ports of the module.   (View)

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In-phase addition circuit composed of the LF155

Published:2011/7/3 21:55:00 Author:Rebekka | Keyword: In-phase addition

Themain parameters typical values of the LF155 are:   (View)

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The single key 555 dual steady switch circuit

Published:2011/7/3 20:48:00 Author:Borg | Keyword: single key, dual steady switch

In figure 1 is the circuit. When the circuit gets power, C1 makes 6-pin of IC(555) acquire a positive pulse, the 3-pin is outputting a low LEV, at the moment, there is no voltage on C2. By pressing the key of S, the 0 LEV is working on 2-pin of the IC, 3-pin is reversed in a high LEV, C2 is charged by R3. After S is released, C2 is charged to Vcc, both the 2-pin and 6-pin are offset to 1/2Vcc by R1 and R2, the high LEV of 3-pin remains the same. By pressing S again, the voltage on C2 makes the voltage on 6-pin of the IC higher than 2/3Vcc, and 3-pin is reversed in a low LEV.   (View)

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The single key switch circuit

Published:2011/7/3 20:51:00 Author:Borg | Keyword: single key

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The high speed switch circuit with clamping diodes

Published:2011/7/3 21:19:00 Author:Borg | Keyword: high speed switch, clamping diodes

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The two stage phase inverter circuit with diode protection

Published:2011/7/3 20:54:00 Author:Borg | Keyword: phase inverter, diode protection

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The starting circuit of single steady state

Published:2011/7/3 20:56:00 Author:Borg | Keyword: starting circuit, single steady state

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The dual steady circuit with relays

Published:2011/7/3 20:57:00 Author:Borg | Keyword: steady circuit

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The circuit of the phase inverter with lamps

Published:2011/7/3 20:59:00 Author:Borg | Keyword: phase inverter

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The single steady circuit with trigger signals on the basic pole of blanking tubes

Published:2011/7/3 21:18:00 Author:Borg | Keyword: single steady circuit, trigger signals, basic pole

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The single steady circuit with trigger signals on the basic pole of the conducting pipe

Published:2011/7/3 22:01:00 Author:Borg | Keyword: single steady circuit, trigger signals, conducting pipe

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The touching switch circuit

Published:2011/7/3 21:20:00 Author:Borg | Keyword: touching switch

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The touching interlock electric switch circuit

Published:2011/7/3 21:32:00 Author:Borg | Keyword: interlock, electric switch

Usually, the RC of the phase inverter input terminal makes the output terminal 0, when touching the line i (i=0,1,2```7), the signal that is inducted by human body is sent to Di terminal and CLK terminal of 74LS374 respectively, at the moment, the CLK has the rising cause, so the state of D (except Di=1, others are 0) is locked on the Q terminal(Qi=Di=1), the corresponding LED is glowing; when the signal is gone(means no touch), the circuit is reset, so CLK has no rising cause.Therefore, only one line of lights are glowing when only one line is touched, which can fulfill the aim of interlocking and indication.   (View)

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The mains over-voltage protection circuit of excellent nature

Published:2011/7/3 21:55:00 Author:Borg | Keyword: over-voltage protection, mains

See as the figure, the circuit adopts the capacitor step-down and the simple regulated power supply circuit, when the power supply is normal, the voltage controlled by TL431C is lower than 2.5V, and TL431C is blocked, the relay is open. When the mains voltage is higher than 250V, the current which has been rectified and filtered reaches 3.3mA, the voltage drops on R3, diode and stabilivolt (including glow tube) are 11v and 26v, respectively. The 37V voltage is distributed by R1 and R2, the voltage on the distributing point is 2.55v, TL431C is conducting, the relay is pulling in, the mains is short, which make the current protector jump or the fuse blow out.   (View)

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The wide band AC separation amplifier circuit of photoelectric couplers

Published:2011/7/3 22:11:00 Author:Borg | Keyword: wide band, AC separation amplifier, photoelectric couplers

In th figure is the wide band AC separation amplifier circuit of photoelectric couplers. When there's no modulation, the photoelectric coupler must work with a DC bias current which is offered by VT1, VD1 is used to improve the temperature feature of VT1. In the circuit, the 6N136 photoelectric coupler is adopted, the LED of it outputs a very low current which is amplified by the transistor. To improve the frequency feature, the common pole circuit composed of TV2 converts the current into the voltage. The voltage gain is decided by the resistor R2 on the collecting electrode of VT2, the working point adjustment is decided by R1.   (View)

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The HCS301 encoder application circuit in wireless emitting circuits

Published:2011/7/3 22:23:00 Author:Borg | Keyword: encoder, wireless emitting circuits

HCS301 rolling encoder chip is developed on the base of non-linear flow code algorithm, which includes the 66-bit transmitting code, 32-bit rolling code, 64-bit programmable secrete key, 32-bit source code, which can generates 266 kinds of combination, which can make sure that the codes won't repeat in 18 years. The special algorithm can make the rolling decoder only react to a code once in the valid period, and every code is sent randomly, the decoding is impossible. The HCS301 encoder circuit, which is applied in wireless emitting circuits, is shown in the figure.   (View)

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The singal terminal (A) power amplifier circuit of ultra 3-pole valve connection

Published:2011/7/3 22:25:00 Author:Borg | Keyword: singal terminal, power amplifier, valve connection

The singal terminal (A) power amplifier circuit of ultra 3-pole valve connection is shown as above.   (View)

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The FM l2 wave band radio circuit of Desheng ll9700

Published:2011/7/3 22:28:00 Author:Borg | Keyword: wave band, Desheng

The FM l2 wave band radio circuit of Desheng ll9700 is shown as above.   (View)

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The inductance controlled switch circuit (3)

Published:2011/7/2 23:08:00 Author:Borg | Keyword: inductance controlled, switch circuit

The circuit that will be introduced can be used to control the lighting lamp and auto door, and it can also be used to burglarproof alarm. This circuit consists of the inducting electrode plate A, regulated diode VS, FET transistor VF, music integrated circuit IC, transistor V, relay K, diode VD, resistor R1 and R2, potentiometer RP and power supply switch S, etc, see as the figure. The inductance controlled switch circuit By adjusting the potentiometer RP, the music time of the IC can be changed, so the working time of the load can be changed.   (View)

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