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From: John Fields on 23 Nov 2008 09:31
On Sat, 22 Nov 2008 10:04:19 -0600, John Fields
<jfields(a)austininstruments.com> wrote:

>On Fri, 21 Nov 2008 08:38:41 -0800 (PST), josegidayfin(a)gmail.com wrote:
>
>>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?
>
>---
>View in Courier:
>
> +5V GND GND
> | | |
> |16 |8 |12
> +--+-----+-----+------------+
> | Vcc GND MR |
> | |
> | |
> | RS RTC Q9 |
> +-+-------------+--------+--+
> |11 |10 |
> +----[1M]-----+ +----->60Hz
> | |
> | [1.1M]
> | |
> +--[30720Hz]--+
> | |
> [22pF] [22pF]
> | |
> +-------------+
> |
> GND
>
>
>The component values are for an ECS-31X crystal, but will be pretty much
>the same for any of the tiny tuning fork watch-type crystals out there,
>I think.
>
>http://www.ecsxtal.com/store/pdf/ecs-31x.pdf

---
Oops...

The chip is a 4060.

JF
From: josegidayfin on 2 Dec 2008 17:30
On Nov 21, 11:14 pm, Jasen Betts <ja...(a)xnet.co.nz> wrote:
> On 2008-11-21, josegiday...(a)gmail.com <josegiday...(a)gmail.com> wrote:
>
> > 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 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 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)

Oh Thank You guys
God Bless You
From: josegidayfin on 2 Dec 2008 17:31
On Nov 21, 11:14 pm, Jasen Betts <ja...(a)xnet.co.nz> wrote:
> On 2008-11-21, josegiday...(a)gmail.com <josegiday...(a)gmail.com> wrote:
>
> > 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 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 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)

Oh Thank You guys
God Bless You
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