Touch light switch delay circuit

Posted on Nov 10, 2015

Is a good touch-down can delay the lamp, the circuit is characterized by: the static power consumption minimal; External switch terminal

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

is only resistant to root, you can directly replace the ordinary switch, figure A novel precision voltage regulator integrated circuit T1.43 } or AS431, image only dressed leather outer seal pole tube, with the female usually the anode electrode between the non-conducting thyristor VT1 Ge broken pipe, lamp F does not shine. When a finger touches the body M when the leakage current flowing through R. , R. Partial pressure, was added to F1,431 control electrode so that T L131 quickly turned, 20V DC through R ,, TI.43l and VD6 to C. Charging wells by R, muddy base VT2 eight poles, so that VT2 conduction, VT1 trigger current that is obtained while the opening of the lamp E on energized to emit light. After eight hand from M, Ct stored charge through R: v r2 to discharge, deceased mother maintain VT2 remain turned on, the lamp E will not be extinguished. Until C- discharge current decreases, sufficient to maintain when conducting VT2, VT1 trigger the loss of current when the AC zero crossing, namely Ge broken lamp E goes out. Mainly by the delay time of the circuit G, R. Q. constant discharge decision. In addition, the trigger sensitivity of VT1 and VT2 magnification p value of Q has a great influence on the delay. VT1 best Mitsubishi CR2AM-12 or CR3AS-12 micro-triggered thyristor way, as long as they have a touch shake 0_irnA current that can turn by the Secretary; VT2 should adopt Samsung TIP50 or MPSA-14 type _ = diode, requiring p / 50, when asked about the delay peel 70s around; the p 250, R. Selection of 4 7Mn H ten, uh delay time reaches 5m, n about.

Leave Comment

characters left:

New Circuits



Popular Circuits

100W Audio Amplifier
Sensitive Electrostatic detector
Current Source
PIC16F628 Digital Clock Timer circuit and explanation
5800 Xpressmusic LCD Screen Display Problem Repair Procedure
fire alarm circuit diagram for home security
Spy Phone Bug Transmitter Circuit
Gentle Breeze
Electronic Drum Synthesizer
External Battery Discharger
Capacitive Discharge Magnetic Pulser