Hi
Frist:
I'am new to this forum and new to electronics.
I searched the forum for a similar project.Before posting here.But? Could not find any thing to what i need.
I build a astable 555 timer for clocking the time period of 10s appox
five secs (On) five secs (Off). Just to learn how the astable circuit works.
And build one for the frist time.It work perfectly .My timer might need to be faster or slower for my project.But i dont know.
http://www.electronics-project-design.com/CountdownTimer.html 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 4020 cmos counter 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.
http://www.electronics-project-design.com/electronictimerswitch.html
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.
What i need to Build
I want to make a repeat delay time switch.
I will use a 555 IC and 4020 counters as in the links.
I can't use a microcontroller i don't know anything about
programming code.Or microcontroller's.
My timer needs to run a full week and repeat its self
from week to week.
So. I need the timer to be (on) for 9Hours starting 8:30AM ending at 5:30pm and (off) for 15Hours in a 24 hour day.if this makes sence to anyone.
Mon thru Sat then completely (off) on Sunday.Then turns back
on the following Monday morning to start all over again.
I will need a logic decoder or diode logic.But? don't
know how this will work into the circuit.For the Switch
i will use a N-channel MosFet to switch on/off the battery
pack which this timer will be connected to.
novice newbe.
Thanks
Frist:
I'am new to this forum and new to electronics.
I searched the forum for a similar project.Before posting here.But? Could not find any thing to what i need.
I build a astable 555 timer for clocking the time period of 10s appox
five secs (On) five secs (Off). Just to learn how the astable circuit works.
And build one for the frist time.It work perfectly .My timer might need to be faster or slower for my project.But i dont know.
http://www.electronics-project-design.com/CountdownTimer.html 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 4020 cmos counter 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.
http://www.electronics-project-design.com/electronictimerswitch.html
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.
What i need to Build
I want to make a repeat delay time switch.
I will use a 555 IC and 4020 counters as in the links.
I can't use a microcontroller i don't know anything about
programming code.Or microcontroller's.
My timer needs to run a full week and repeat its self
from week to week.
So. I need the timer to be (on) for 9Hours starting 8:30AM ending at 5:30pm and (off) for 15Hours in a 24 hour day.if this makes sence to anyone.
Mon thru Sat then completely (off) on Sunday.Then turns back
on the following Monday morning to start all over again.
I will need a logic decoder or diode logic.But? don't
know how this will work into the circuit.For the Switch
i will use a N-channel MosFet to switch on/off the battery
pack which this timer will be connected to.
novice newbe.
Thanks