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Switch Timer For Bathroom Light

This 9-minute timer switch can be used to control the light in a toilet or bathroom. The timer is started by pushing S1 and stopped by pushing S1 again. If you forget to turn it off, the controlled light will go off after nine minutes. If you need the light on continuously non-stop, you need to press S1 (turn on) and then S2 (cancellation of timer) within 9 minutes and in this case the light will be on until you switch it off with S1. IC1 is a is 4013 dual flip-flop. Flip flop IC1a is toggled on and off by switch S1 and it controls the relay which is switched by FET Q2. IC1a controls IC1b which is connected as an RS flipflop to enable or disable IC2, a 4060 oscillator/divider. This has its timing interval set by the components at its pins 9, 10 & 11. The relay should have 250VAC mains-rated contacts and these are connected in parallel with an existing wall switch.
Author: Rasim Kucalovic
Copyright: Silicon Chip Electronics

Be the first to comment - What do you think? Posted by admin - October 24, 2010 at 6:49 pm

Categories: Lighting, Timer Tags: accurate reaction timer, light control, Timer Switches

Automatic timer switch with ic 7611

This circuit will help facilitate in sleepy eliminating the need to get off or the radio. Etc., which can save energy costs down.
When the switch S1 / 2 power input to the circuit C1 No. 7611. To a voltage comparison circuit. The pin 3 is the noninverting pin. for pin 2 to pin inverting.
The pin 3 was divided voltage from R3 and R4. Used as a reference voltage for comparing the voltage at Pin 2 And the voltage drop across C2.The VR1, R1 and C2 is set to delay.To set up a long time. I add the R1 and C2.The switch S1 / 1 to determine the C2 discharge through R10 out.To start new work while off.The switch S1 / 1 and S1 / 2 are in the same But working conditions are opposite.

Be the first to comment - What do you think? Posted by admin - at 3:37 am

Categories: Electronic Control, Timer Tags: automatic control circuit, automatic timer switch, Timer Switches

5 Minutes Time Delay using CD4093

This be delay timer circuit model to be simple. It be the character delays to close electric all appliances. By fix the time about 5 minute. It can fine decorate the time. When see the circuit uses digital IC number CD4093 make good easy. And use transistor driver relay. It performs to edit the electricity gives with load or the electric appliances is all. When see our circuit uses electronic part that seek easy. May have no the problem about part. For LED1 use for display when feed power supply reach the circuit. It usability easily just press S1 for begin be usable.
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