I would like to make an automotive delay relay circuit by 555, but by turn on/off another relay near this circuit the delay time changes, I used regulator, inductor and RC filter for input supply but unfortunately the problem not solved,Iwill be glad if suggest me an application solution.
Automotive delay relay
Aug 14, 2005
5 Replies
Unfortunately, your description is as clear as mud.
If you would describe your desired application more precisely, we may be able to help.
Cheers
PeteS
--- You haven't said how you're triggering the 555, so I didn't show anything about that,but try this for the power supply:
78L05 +-------+ +12V>----+---[1N4002>]--+--------+------|IN OUT|---+--+5V |K |K |+ | GND | | [1N4002] [1N5355] [1000µF] +---+---+ [0.1] | | |25V | | GND>-----+-+------------+--------+----+-----+-------+ | | | 7555 | | +--------+ | +---|GND | | | | | E [0.1] | OUT|---[150]---B 2N4401 | | | C +5V--+---|Vcc | | +--------+ +---------+ | | [IN4001] [COIL]- - | |K | O--> |....... try this for the power supply:
...snip...
Now that's what I call bulletproof! Betcha can't even hear the 'clik!'
Cheers-- Terry--WB4FXD Edenton, NC
And for his work, will he even get a thank you from the op? It would be refreshing. Too often, the op disappears, and we never learn how he/she made out. And too often, somone posts a nice solution and doesn't get any appreciation from the poster. Grumble.
Ed
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