power cycling source

[timgor]

I have 4 v power source.
Does anybody have idea how to make it off for a short period 1...5 sec, 1...2 times per day periodically?
There is something in my head about alarm clock scheme but I cannot finality get simple and fast solution.

 

[jiripolivka]

I have 4 v power source.
Does anybody have idea how to make it off for a short period 1...5 sec, 1...2 times per day periodically?
There is something in my head about alarm clock scheme but I cannot finality get simple and fast solution.

It will depend on your load current. On the market there are alarm clocks with a separate contact to use for such purpose, or you can build your timer and switch.
The 555 timer is easy to generate 1...5 sec pulses, another to generate pulses for 12-24 hours cycle. You can build an adjustable pulse generator with the 555, 556 and CMOS logic circuits. The pulses longer than ~1 hour are better generated from a crystal oscillator with a divider (like in electronic clocks). To switch the power, use a relay with contacts rated for the load current.

 

[timgor]

It will depend on your load current. On the market there are alarm clocks with a separate contact to use for such purpose, or you can build your timer and switch.
The 555 timer is easy to generate 1...5 sec pulses, another to generate pulses for 12-24 hours cycle. You can build an adjustable pulse generator with the 555, 556 and CMOS logic circuits. The pulses longer than ~1 hour are better generated from a crystal oscillator with a divider (like in electronic clocks). To switch the power, use a relay with contacts rated for the load current.

Thanks for idea with the alarm clock. Do you have example of some cheap timers like amico digital timer?