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PICList Thread
'[EE]: Need idea for elapsed time'
2003\06\01@193547 by Tal

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Hi All

I need an idea for a circuit to check if a fixed time period (>2 sec) as
passed.
the circuit I am checking is a 12vdc pump if it working more than 2 sec then
I need a high or low signal to start a buzzer..
can you think about a cheap and easy solution?

Regards

Tal

"I have not failed. I've just found 10,000 ways that won't work."
Thomas Edison

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2003\06\01@235902 by Katinka Mills

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you could do it with a 555 timer wired across the motor supply, so when the
motor has been running >2 seconds it times out and sounds the buzzer

Regards,

Kat.

> {Original Message removed}

2003\06\02@001820 by Steve Smith

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555 and a flip flop!

Close to 2p as I could get!

Steve

-----Original Message-----
From: pic microcontroller discussion list [spam_OUTPICLISTTakeThisOuTspamMITVMA.MIT.EDU] On
Behalf Of Tal
Sent: 02 June 2003 00:35
To: .....PICLISTKILLspamspam@spam@MITVMA.MIT.EDU
Subject: [EE]: Need idea for elapsed time


Hi All

I need an idea for a circuit to check if a fixed time period (>2 sec) as
passed. the circuit I am checking is a 12vdc pump if it working more than 2
sec then I need a high or low signal to start a buzzer.. can you think about
a cheap and easy solution?

Regards

Tal

"I have not failed. I've just found 10,000 ways that won't work." Thomas
Edison

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

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