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i am wondering if anyone know how to adjust an electronic device so it can work on a specific timeframe, I have a water pump, I would like to make it work only within a determined time range, for example 8 am to 4pm, I was thinking to use raspberry pi but I think that's beyond the need. Thanks!

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Figure 1. Plug-in 24-hour timers are available in all countries and in many formats, analogue and digital.

  • Set the clock.
  • Set the on-times.
  • Plug timer into socket.
  • Plug pump into timer.
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    \$\begingroup\$ I can't explain how much grateful i am for this advice, I didn't even know it exist, Thanks a lot! \$\endgroup\$ – Amine Dev May 5 at 22:51
  • \$\begingroup\$ All the UK plugs and UK/Ireland URLs, I'm surprised to see the one NEMA 5-15 in the bottom middle! \$\endgroup\$ – Hearth May 6 at 2:28
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You can use a monostable multivibrator . Your astable circuit should have a period of 8hours , every time the multivibrator gets triggered it will return to the stable condition after 8 hours.

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  • \$\begingroup\$ I appreciate your help, thanks \$\endgroup\$ – Amine Dev May 5 at 22:50
  • \$\begingroup\$ This will desynchronize with clock time rather quickly. Far better to use an RTC or even just count power line cycles. \$\endgroup\$ – Hearth May 6 at 2:27

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