Showing posts with label switch. Show all posts
Showing posts with label switch. Show all posts
Friday, September 27, 2013
Switch Timer Circuit 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.
Circuit diagram:
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
Tuesday, September 10, 2013
PCB Exposure Switch Timer V2 0
After some modifications on my UV exposure box (scanner) for better UV expose, i decided that a better pcb must me designed for switch timer. The old one had over drilled holes and it was designed and built on my very fist steps. Also the high voltage side from the low voltage wasn’t separated as it needed to be safe.
So i redesigned it in a more compact and easier to use pcb. The firmware has been also updated and now you can program the timmer by using the two buttons. The time is calculated by timer interrupt triggering using a 32.768KHz RTC Crystal with better accuracy. The display update also has been changed from static to dynamic.
Tuesday, December 18, 2012
Wiring light Switch Ceiling Light Project
Telephone Socket Wiring How To Do It.
Thread Wiring Clipsal Saturn Light Switches.
Mesa Whole House Wiring Services Provided By Amadeus Electric.
Multi Room Wiring.
Russell Residence 10007 Meadow Road Sw Lakewood Wa 98499.
Home House Wiring Installation.
250 And 525 Sx Mxc Exc Electrical System And Wiring Diagram Here.
Wiring A Switched Outlet Wiring Diagram Electrical Online.
Wiring A Light Switch For A Ceiling Light Diy Project.
In A Home Equipped With Lexcom Home Wiring Network Cabling System.
Friday, November 23, 2012
Wiring light Switch Ceiling Light Project
Telephone Socket Wiring How To Do It.
Thread Wiring Clipsal Saturn Light Switches.
Mesa Whole House Wiring Services Provided By Amadeus Electric.
Multi Room Wiring.
Russell Residence 10007 Meadow Road Sw Lakewood Wa 98499.
Home House Wiring Installation.
250 And 525 Sx Mxc Exc Electrical System And Wiring Diagram Here.
Wiring A Switched Outlet Wiring Diagram Electrical Online.
Wiring A Light Switch For A Ceiling Light Diy Project.
In A Home Equipped With Lexcom Home Wiring Network Cabling System.
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