timer circuit

Discussion in 'The Projects Forum' started by spankey666, Jan 1, 2015.

  1. spankey666

    Thread Starter Member

    Nov 30, 2011
    I have a metal halide lamp which requires 2-3 minutes to warm up which i use for photo graphic exposure. i am looking for direction for a circuit that will :
    1 : turn on the lamp to warm up
    2: once a button is pressed, turn off the lamp after a designated time

    i am struggling to get my head around this simple task, any recommendations appreciated
  2. MikeML

    AAC Fanatic!

    Oct 2, 2009
    You want to build, or buy?

    AC line voltage? (we wouldn't have to ask if you put the country in when you registered)
    How many watts is the lamp?
  3. tracecom

    AAC Fanatic!

    Apr 16, 2010
    So, in operation, you will turn the lamp on, use it when you judge it to have warmed up, and then press a button which turns the lamp off after a cool down period. Correct? Or do you also want a timer to tell you when the lamp has warmed up?

    What is lamp voltage?
    What is lamp wattage?
    What is warm up period?
    What is cool down period?
    What plug is on the end of the lamp cord?
  4. spankey666

    Thread Starter Member

    Nov 30, 2011
    thanks for the reply,
    you've kinda got the situation, i want to turn the lamp on to warm it up, then once i'm happy its hot trigger a timer to turn it off after exactly 120 seconds.
    voltage for ballast control is 240v , lamp itself is 600w but manufacturer states the control can draw 10 amps on start up.
  5. ScottWang


    Aug 23, 2012
    google : ac220v digital timer switches.
    google : ac220v timer controller
  6. blocco a spirale

    AAC Fanatic!

    Jun 18, 2008
  7. spankey666

    Thread Starter Member

    Nov 30, 2011
    thanks i have found a solution