Connect with us

5second dark triggered timer

Discussion in 'General Electronics Discussion' started by baba101, Nov 16, 2017.

Scroll to continue with content
  1. baba101

    baba101

    4
    0
    Nov 15, 2017
    Here is Pmosfet timer with 5second on time , i am using A19 smd fet ..
    FET timer is chosen to save battery on standby

    but unable to make that Dark sensing trigger , i have to

    1)keep cost low , no mcu
    2)use common parts like bc547/5577

    dark sensing trigger ,meaning it will make 5second timer on , when there is a shadow on LDr, ldr is getting light all the time otherwise
     

    Attached Files:

  2. CDRIVE

    CDRIVE Hauling 10' pipe on a Trek Shift3

    4,960
    648
    May 8, 2012
    Maybe I'm missing something. Where did you find (link) that circuit?

    Chris
     
  3. Alec_t

    Alec_t

    2,736
    725
    Jul 7, 2015
    Is this a school/college task?
     
  4. CDRIVE

    CDRIVE Hauling 10' pipe on a Trek Shift3

    4,960
    648
    May 8, 2012
    Oooo, I used to catch those but I usually caught words and phrases.
    Like:
    We.
    Not allowed to use IC's, MCU's, etc.
    Needed this yesterday.
    "I'm" or "we're" not permitted to use ......
    Must provide circuit description including theory of operation.

    Chris
     
    Arouse1973 likes this.
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-