Using a programmable timer from ebay to power a simple dc motor.

Discussion in 'The Projects Forum' started by Ser97, May 1, 2016.

  1. Ser97

    Thread Starter New Member

    May 1, 2016

    Ok, so l am an engineering student in Maryland and for our design project in our intro class we have decided to build an automatic plant watering device. Since my programming skills are slim to non(i can program my ti84 to pump out answers in calc, and matlab to answer matrix problems) l figured buying a timer circuit would be the cheapest and easiest route. My classmate has one of the timers and swears it converts dc to ac and since our pump is 6 to 12 vdc will obviously not work. The controller i have (info in pdf and pics shown) looks like i can do the simple task i ask off a 9v (i know it won't work long term but hey it only needs to work once, plan was to use aa and a battery pack but our budget didn't allow this).

    So my main question is will following my schematic give me the functions i desire (to turn on for x amount of time every y amount of mins/hours) or should we go another route. I would Normally test before posting but i don't have access to anything other than the timer and can't afford to go out and buy even a power supply until Friday. I did search before posting while there was similar post they were using other microchips,or other ideas like a clock.etc as timers.
  2. roadey_carl

    Senior Member

    Jun 5, 2009
    This is all a bit confusing....

    Yes that timer has a function to turn on for X and off at Y.
  3. TheButtonThief

    Active Member

    Feb 26, 2011
    Actually looks overkill
  4. Ford Prefect

    Senior Member

    Jun 14, 2010
    I have recently bought a programmable timer from eBay. I have tested it and works great and is quite inexpensive.
    See this link:

    This maybe more suitable for your needs.
  5. crutschow


    Mar 14, 2008
    That timer doesn't convert DC to AC, which would require an inverter circuit (I suggest you not listen to your classmate about electronic information whether he swears or not :rolleyes:).
    It operates from DC and controls a SPDT relay contact that can switch either AC or DC.