binary clock power circuit

[[email protected]]

hi
i build a bcd clock shown in the page
http://ourworld.compuserve.com/homepages/Bill_Bowden/clock.htm
and all the circuit works fine but i want to chage the power source
of
the circuit to dc source.
so my question is how can i get a 60Hz frequency from a dc source?

thanks in Advance

 

[Jasen Betts]

hi
i build a bcd clock shown in the page
http://ourworld.compuserve.com/homepages/Bill_Bowden/clock.htm
and all the circuit works fine but i want to chage the power source
of
the circuit to dc source.
so my question is how can i get a 60Hz frequency from a dc source?

you don't need a 60 Hz frequency, (if you want to see how
controversial they can be look here
http://groups.google.com/group/sci.electronics.basics/browse_thread/thread/7ac304221029c757
)

all you need is one pulse per second on pin 1 of the seconds counter.
you can get that using the circuit found on the the CD4040 datasheet
that uses a crystal by using a 32768Hz crystal and dividing it by
32768, to do that just use a CD4060
( www.fairchildsemi.com/ds/CD/CD4060BC.pdf#page3 page 3 )

and take 2Hz output from pin 1 of the 4060 to pin 10 of the existing 4040
(disconnect the existing input to that pin)

on the right of the CD4040 chip the circuit then needs to be adjusted for 2Hz input

connect pin 4040 pin 9 to the seconds chip pin 1 (disconnect other
wires from there)

the 2 nand gates, inverter and xor gate are not needed but will have
no effect on the operation of the circuit (so long as 74hc14 pin 4 is
not connected to seconds chip pin 1.

disconnect the seconds and hours set switches from 4040 pin 6
and connect them instead to 4060 pin 1 (or use pin 2 or pin 3 if 1 is too fast)

 

[David L. Jones]

hi
i build a bcd clock shown in the pagehttp://ourworld.compuserve.com/homepages/Bill_Bowden/clock.htm
and all the circuit works fine but i want to chage the power source
of
the circuit to dc source.
so my question is how can i get a 60Hz frequency from a dc source?

The old way is with a MC5369 chip
http://www.elecfree.com/electronic/wp-content/uploads/2008/08/circuit-60hz-clock-pulse-generator.jpg
But I think that device is discontinued.

Otherwise you need a suitable frequency oscillator and a divider
circuit to get 60Hz.

Dave.

 

[Michael Black]

The old way is with a MC5369 chip
http://www.elecfree.com/electronic/wp-content/uploads/2008/08/circuit-60hz-clock-pulse-generator.jpg
But I think that device is discontinued.

It was discontinued a decade ago. There were threads back then about
replacements. Michael Covington one asked about the simplest solution,
and then ran the best result in the Q&A column that he was running in
"Electronics Now" around that time.

Michael

 

[[email protected]]

you don't need a 60 Hz frequency, (if you want to see how
controversial they can be look herehttp://groups.google.com/group/sci.electronics.basics/browse_thread/t...
)

all you need is one pulse per second on pin 1 of the seconds counter.
you can get that using the circuit found on the the CD4040 datasheet
that uses a crystal by using a 32768Hz crystal and dividing it by
32768, to do that just use a  CD4060  
(www.fairchildsemi.com/ds/CD/CD4060BC.pdf#page3 page 3 )

and take 2Hz output from pin 1 of the 4060 to pin 10 of the existing 4040
(disconnect the existing input to that pin)

on the right of the CD4040 chip the circuit then needs to be adjusted for2Hz input

connect pin 4040 pin 9 to the seconds chip pin 1 (disconnect other
wires from there)

the 2 nand gates, inverter and xor gate are not needed but will have
no effect on the operation of the circuit (so long as 74hc14 pin 4 is
not connected to seconds chip pin 1.

disconnect the seconds and hours set switches from 4040 pin 6
and connect them instead to 4060 pin 1 (or use pin 2 or pin 3 if 1 is toofast)

Oh Thank You guys
God Bless You

 

[[email protected]]

you don't need a 60 Hz frequency, (if you want to see how
controversial they can be look herehttp://groups.google.com/group/sci.electronics.basics/browse_thread/t...
)

all you need is one pulse per second on pin 1 of the seconds counter.
you can get that using the circuit found on the the CD4040 datasheet
that uses a crystal by using a 32768Hz crystal and dividing it by
32768, to do that just use a  CD4060  
(www.fairchildsemi.com/ds/CD/CD4060BC.pdf#page3 page 3 )

and take 2Hz output from pin 1 of the 4060 to pin 10 of the existing 4040
(disconnect the existing input to that pin)

on the right of the CD4040 chip the circuit then needs to be adjusted for2Hz input

connect pin 4040 pin 9 to the seconds chip pin 1 (disconnect other
wires from there)

the 2 nand gates, inverter and xor gate are not needed but will have
no effect on the operation of the circuit (so long as 74hc14 pin 4 is
not connected to seconds chip pin 1.

disconnect the seconds and hours set switches from 4040 pin 6
and connect them instead to 4060 pin 1 (or use pin 2 or pin 3 if 1 is toofast)

Oh Thank You guys
God Bless You

 

[neon]

Or you can biuld a radio reciever to detect 60kz from cessium clock acurate to 1sec every 20 millions years.