simple timer circuit - Electronic Circuits Projects Diagrams Free

basb1 · 6th October 2005, 12:19 AM

Hi can anyone please email me a simple schematic / parts list for a timer circuit
I need to turn a pump on and run it for 10 seconds then off again. (the switch will be a LDR and the pump is 12v dc) thanks in advance.

ljcox · 6th October 2005, 01:18 AM

If you search this forum for "timer" you will find many. But you will have to do some minor adaption for your purpose.

John walker · 8th October 2005, 03:17 AM

One of the bet chips for this is a 555 Timer has it uses few external parts
and there is plenty of data about to set the timing.

try a seach on google for data sheets as they include the monstable and multivib circuit component values.

Russlk · 9th October 2005, 02:11 PM

What is the LDR resistance and how much current does the pump draw?

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6th October 2005, 12:19 AM	#1
basb1	simple timer circuit Hi can anyone please email me a simple schematic / parts list for a timer circuit I need to turn a pump on and run it for 10 seconds then off again. (the switch will be a LDR and the pump is 12v dc) thanks in advance.

6th October 2005, 01:18 AM	#2
ljcox	If you search this forum for "timer" you will find many. But you will have to do some minor adaption for your purpose. __________________ Len

8th October 2005, 03:17 AM	#3
John walker	One of the bet chips for this is a 555 Timer has it uses few external parts and there is plenty of data about to set the timing. try a seach on google for data sheets as they include the monstable and multivib circuit component values.

9th October 2005, 02:11 PM	#4
Russlk	What is the LDR resistance and how much current does the pump draw? __________________ see my website: www.geocities.com/russlk