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Flasher (On/Off) Circuit

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owais131

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Dear Respected Members,

I have found couple of topics related Flasher On/Off Circuits, they have used 555-time IC. I want to make a simpler circuits with fewer components without an 555 IC that can give me On/Off time = 0.5 secs. Any suggestions ? I have made it with C945 , capacitor and resistor, but ON/OFF time is less then 100ms.
 

Post your circuit
ill run it with ltspice
or google " transistor flasher"
Google
 

no way relay will not work cause u need more current /voltage for a longer time ,any way 0.5 sec on /off is too fast for a normal relay .
 

By switching the relay in 0.5sec intervals, you'll damage the relay very quickly (ie, if the relay can work that fast to start with). If you need to use the relay and you prefer not to use 555, then you could use an astable multivibrator made with 2 transistors.

Hope this helps.
Tahmid.
 

dselec said:
no way relay will not work cause u need more current /voltage for a longer time ,any way 0.5 sec on /off is too fast for a normal relay .
Click to expand...

i m using micro relay (TYCO) and the duration is not a matter as this operation lasts for maximum 1 minute or less than that.

---------- Post added at 15:45 ---------- Previous post was at 15:44 ----------
Tahmid said:
By switching the relay in 0.5sec intervals, you'll damage the relay very quickly (ie, if the relay can work that fast to start with). If you need to use the relay and you prefer not to use 555, then you could use an astable multivibrator made with 2 transistors.

Hope this helps.
Tahmid.
Click to expand...

OK, if the time is 1 sec ON and OFF, then , is it possible ?
 

Do you want to continuously turn it on and off at 1 second delays? Then, you can't (shouldn't) use a relay. You have to use a solid state driver like transistor/MOSFET/IGBT or solid-state relay or SCR/Triac.

Hope this helps.
Tahmid.
 

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