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
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Touch Switch By IC 4001 & 4020
Source: http://www.redcircuits.com//Page22.htm
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