I hope to make a compact electric circuit to control my module.
Because module size is very small (diamter=11 mm, length=30 mm), I can't use general timer relay.
My module operates as follows.
Signal input (Switch on) > first part actuating(latching part is melt) > time delay (for example 5 sec) > second part actuating(latching part is melt)
I can use just one signal, not two, so I try to actuate second part by delaying turn on timing. In case of the macro size system, it is very easy condition but size limitation interrupts me. As I guess, some IC chip or timer(ex. NE555) should be utilized like this case. Or is there any micron timer relay?
I will make a custumized PCB after fixing electric circuit.
Best regards
Dongkyu Lee
Hi Dongkyu Lee,
Have a look at the data sheet for the MIC1555 This can be used to give a delay similar to the 555 timer but are much smaller and need fewer components. You could cascade 2 of these together to give you the timing you need. For the power switching, again for compactness i would recommend using an N-channel Mosfet. They can handle very high currents (but DC voltages only). If you are interested in doing more of this kind of electronics I would highly recommend looking at the atmel 8-bit micro-controllers, used for example in the popular arduino boards. Having an "on board computer program" for switching and controlling pins, gives almost limitless flexibility, and the AVR studio system is really first class!
For PCB manufacture I would recommend PCBway.com, they are so cheap that its not even worth prototyping, particularly for such small components! (and recommend using solder paste for surface mounted parts!)
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