Capacitive Sensor(Touch switch relay) with BC337


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Capacitive Sensor(Touch switch relay) with BC337

Special design for shop-windows animation
Useful for many types of touch controls

Parts:

R1,R2_____1M 1/4W Resistors
R3,R4____47K 1/4W Resistors

C1_______10µF 25V Electrolytic Capacitor
C2______470pF 630V Ceramic or Polyester Capacitor

D1-D3____1N4002 100V 1A Diodes

Q1-Q3_____BC337 45V 800mA NPN Transistors

RL1_______Relay with SPDT 2A @ 220V switch
Coil Voltage 12V. Coil resistance 200-300 Ohm

J1________Two ways output socket

Sensor____Aluminium or copper thin sheet with the dimensions of a post-card,
glued at the rear of the same (about 15×10.5 cm.)

Thin screened cable

Related Links
More circuit about touch relay switch
Single Transistor Relay Toggle Circuit
Relay Toggle Circuit Using a 556 Timer
CMOS Toggle Flip Flop Using Push Button
Relay Toggle Circuit Using a 555 Timer
CMOS Toggle Flip Flop Using Laser Pointer
Touch Switch By IC 4001 & 4020

Source: http://www.redcircuits.com//Page22.htm



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