tpetar
I would like to use this circuit. But i need 9 hour on 15 hours off.
Plus I do not want to use a relay on the output to use as the on/off switch.
I want to use a N-channel pwer switching MosFet.
How would i get this by using the 4060 ossillator. The 4060 has the ability to go up to 2/14 power.
Also a crystal could make it more accurate. But? I can't find a crystal at 0.03125Hz
How accurate is the circuit you posted for your fan project.
I see ljcox used a crystal with the 4060. It has an astable on the 4060. But? ljcox used a standard
crystal. my FQ for the timing is not a standard crystal. So i may not beable to get a crystal that
i can use. Thoughts?
Try this simple repeating timer I used this for fan (defines off and on time) :
You need an accurate oscillator - hence the need for a crystal.tpetar
I'm not looking to make a time clock. I making a electronic timer switch.
Which stays on for 9Hs off for 15Hs.
Also. Yes? A microcontroller would make this easzier. But? I'd rather do it with logic ICs first. This sensible if you want to learn about digital logic.
And i have the 4060 chips.And switching Mosfets.
I could not find the circuits that these links are supposed to point to. They led to the home pages.Hi All
**broken link removed** Here's a circiut that i came across searching for timers.
This timer is about 30% of the ciruit i could use.The 555IC and the Binary 4060 and 4020 cmos counters IC set-up.I don't want to use a relay. They draw to much current for my project.I was thinking a Mosfet as the on/off switch. My total ciruit needs to draw 2mA or less. My supply voltage will be 3.6Vs my 555 IC input supply voltage is 3V-15V same go's for the the binary counter.
**broken link removed**
Here's another timer that might be even closer to my needs.But? I have
no clue. this uses diodes as logic coding on the output.
ljcox
I somewhat understand what your saying. But? I don't understand how to put the parts together. I understand that, my diagram will help you.
What i need to have the timing set at on pins 9,10,11 for Rt & Ct or pins 10,11 for the watch crystal timing set up. See the attachment of the meeting timer that I posted previously. That shows how thw crystal is connected to the 4060.
If need 9Hs for the mosfet to stay on dosen't the ossillator timer needs to pluse 0.50 secs on and 0.50 secs off. You can't buy a 2 Hz crystal.
to flip pin 3 16,348 2^14 But? you must set pin 7 buy dividing 0.5/ by 16 which gives you the crystal 0.03125Hz for the timing on pin7 Q4 16bit.
that pluses 50sec on 50sec off. Throughts? This is what i think is what i need to do. Yes or No. No. See below.
Or do i need more counters to divide down to 0.03125Hz this is what I'm not understanding. Help?
---------- Post added at 18:01 ---------- Previous post was at 17:59 ----------
ljcox
I will repost them again.
I'm not looking to make a time clock. I making a electronic timer switch.
Which stays on for 9Hs off for 15Hs.
Also. Yes? A microcontroller would make this easzier. But? I'd rather do it with logic ICs first.
And i have the 4060 chips.And switching Mosfets.
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