Thursday, April 6, 2017

Circuit Schematic Touch operated Band Switch for Radio Set using NE555 IC

Robometricschool. - This is one of the generator circuit schematic application using some components like NE555 IC. This circuit schematic named with Touch operated Band Switch for Radio Set using NE555 IC.

In this time we will give you global description about Touch operated Band Switch for Radio Set using NE555 IC like the circuit schematic, component list and description.

Circuit Schematic

Component Part

  1. R1, R2 = 3.3 MΩ
  2. R3, R4 = 470 Ω
  3. R5, R6 = 150 Ω
  4. C1 = 0.1 µF
  5. IC1 = NE555
  6. D1, D2, D3 = 1N4001
  7. LED1, LED2 = different color LED
  8. TP1, TP2 = Touch plate
  9. RL1, RL2 = 6V, 100 Ω Relay

Description

This is one circuit schematic of Touch operated Band Switch for Radio Set using NE555 IC. According Electronicsproject site describe that the touch switch are now in vogue for stereo decks and other audio and video sets. This small circuit is meant for electronics enthusiasts to help them covert the manual bandswitch of their radio set to an electronics touch switch with band indicators using LEDs.

The circuit incorporates a 555 IC which operates in the biastable mode. Due to high input impedance presented by the threshold terminal (pin 6 of the IC) and the trigger terminal (pin 2), the timer can be set and reset with the touch of a finger.
Touching touch plate TP2 causes the output (pin 3) to go high. Hence relay RL2 gets energized while relay RL1 remains inactive. On touching TP1, relay RL1 conduct while RL2 is switch off.

If the relay are not switch on and off properly, the supply voltage may be increased to 7.5 volts. If it still doesn’t work, reduce the value of R3 and R4.


0 comments:

Post a Comment

Thank's for your visiting and reading this article, please share your idea with comment here