Touch light switch delay circuit


Posted on Mar 28, 2007

Just use the call sheet to touch the electrical threshold M, namely E lamp lights when asked the same interval subparagraph, lights automatically turn off. VD], vs, (., C, to form a lH capacity drop voltage regulator rectifier circuit, (1 at both ends to


Touch light switch delay circuit
Click here to download the full size of the above Circuit.

lose thirty i V left the business flow ^} U pressure triode thyristor VT1 and product composition WI2 delay touch the switch usually, VT1 place in the off state, VL) 2 no trigger voltage output, crystal thyristor VT2 off, the lamp is not lit when E manpower touch. touch electrode films, alternating current flowing through the sensor body care injection - diode VT1 base make VT1 conduction, VIJ2 lose j n H current to trigger VT2 opened, followed by lighting the lamp E, at the same time (through VT1 Ying-speed charging. when manpower away from the electrode sheet M, f. still bears VD2 l, doors shake _T2 discharge iU so they can maintain VT2 conduction, so that the lamp continues to emit light. when the (r basic charge is bled off in the AC H 0:00, V T2 shut off lights E was extinguished, bright electric lights the length of time, depending on the main playing Ci and R: numerical value of larger, more lighting time. long; J beans is a short illustrated using old data, just ask about the extension of Trent 9 (is if you want to delay pregnancy. called among the most light to increase C, capacity; the contrary, can be reduced (or R value 1. It should be noted, R, the resistance can not be too large, otherwise thyristor tube VT2 7 should be easy to turn off .VT2 CRiOli, 2N656j trigger current type and other smaller sentenced Guo Jing-way thyristor (O. S-iA / 40 (1V), the other component parameters Figure no special requirements.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Low-Power Antenna Tuner Circuit
remote control using the ne 555 and lm 567
Led display digital Voltmeter
automatic night lamp 230v
periodic timer
FM Wireless Microphone
Voltmeter with LED for car battery PCB
simple sound to light converter schematic
The LED car voltmeter (3)
The local oscillator for 10.7 to 2.5MHz conversion
120W power amplifier circuit



Top