0 to 99 counter

This should be relatively easy if you have the CD4029's already. One of these chips can count from 0 to 9 provided you set the BINARY/ DECADE (pin-9) to a low level. Also put the UP/DOWN (pin-10) of this part to a high level to enable counting in the upwards direction.

Counting to 99 will require two of the CD4029s. Connect the pin-9 and pin-10 of both parts as discussed above. Also wire the PRESET input (pin-2) on both parts to a low level. Wire the clocks in common to both parts and connect to whatever it is that will advance the count. On the first device (low digit counter) make sure to set the CARRY_IN (pin-5) to a low level. Then take the CARRY_OUT (pin-7) of the first counter and wire it to the CARRY_IN (pin-5) of the secound counter. This latter connection allows the second high digit counter to step only when the low digit counter is rolling over from nine back to zero.

Since these are CMOS parts it is advisable to also tie all of the JAM_LOAD (pins 3, 4, 12 and 13) inputs to low levels at both chips.

For the basic counter you desire no other chips should be required to implement the 0-99 count sequence.

- mkaras

Sell the chips and buy a Basic Stamp, of course.

-- Many thanks,

Don Lancaster voice phone: (928)428-4073 Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552 rss:

Please visit my GURU's LAIR web site at

Zing! Yeah what's the deal with 4000-series CMOS in 2007?

"Too cool"! That's hilarious.

John

I can visualize him now. Mr. Bollywood.

Best regards, Spehro Pefhany

On a sunny day (9 Feb 2007 06:18:59 -0800) it happened heman_too snipped-for-privacy@yahoo.co.in wrote in :

Use a PIC micro controller, and glue the 4029 on top.

Get two 4029s, and connect them together in the right order.

Good Luck! Rich

heman_too snipped-for-privacy@yahoo.co.in wrote in news:1171030739.536650.229460 @j27g2000cwj.googlegroups.com:

Apply wire, solder, power, and a little book learnin'... not necessarily in that order...

----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----

----= East and West-Coast Server Farms - Total Privacy via Encryption =----

It doesn't matter which order the 4029s are connected. ;-)

If you can't understand the incredibly simplified description in the datasheet then your chances of even wiping your butt are next to nil. Make yourself useful and volunteer to pick up litter in your neighborhood or something.

Late at night, by candle light, heman_too snipped-for-privacy@yahoo.co.in penned this immortal opus:

Read an app-note?

- YD.

What part of "obvious school work" did you miss?

I pick up an issue of Nuts 'n Volts every now and then for fun, and printed solutions to most problems is either a 555 timer or a PIC.

-Dave Pollum

The class action suit for gross incompetence.