MM5311 Clock Chips...>>

T

Tim M

Guest
Looking for some MM5311 clock chips (with BCD outputs). I'm using this
for a Nixie tube clock project and this seems the simplest way to do
things without requiring a lot of unwanted chips.

Anyone know where I can get such things?

Thanks,

Tim
 
Tim,
Good luck finding them, I've been looking for the MM5311's for a while. You
can still get the MM5314's but you will need the 74C915 7 Segment to BCD
converter chip. Plus you will meed a 7441/74141 with either chip anyway. I
built my 1st 6 digit nixie clock with 17 TTL ic's earlier this year. You
can see the photos at http://www.tuberadios.com

You can purchase a preprogrammed PIC ic's that will need 2 7441's. If you
want more info, let me know. I have been on this nixie tube quest for a
while.

Regards,
Sal Brisindi

Tim M wrote:

Looking for some MM5311 clock chips (with BCD outputs). I'm using this
for a Nixie tube clock project and this seems the simplest way to do
things without requiring a lot of unwanted chips.

Anyone know where I can get such things?

Thanks,

Tim
Click to expand...
 
The MM5314 plus converter might work...would only add one chip to my
design. Where can the 5314s be had?

Thanks,

Tim

Sal Brisindi wrote:
Tim,
Good luck finding them, I've been looking for the MM5311's for a while. You
can still get the MM5314's but you will need the 74C915 7 Segment to BCD
converter chip. Plus you will meed a 7441/74141 with either chip anyway. I
built my 1st 6 digit nixie clock with 17 TTL ic's earlier this year. You
can see the photos at http://www.tuberadios.com

You can purchase a preprogrammed PIC ic's that will need 2 7441's. If you
want more info, let me know. I have been on this nixie tube quest for a
while.

Regards,
Sal Brisindi

Tim M wrote:


Looking for some MM5311 clock chips (with BCD outputs). I'm using this
for a Nixie tube clock project and this seems the simplest way to do
things without requiring a lot of unwanted chips.

Anyone know where I can get such things?

Thanks,

Tim
Click to expand...
 
Sal Brisindi wrote:
Tim,
Good luck finding them, I've been looking for the MM5311's for a while. You
can still get the MM5314's but you will need the 74C915 7 Segment to BCD
converter chip. Plus you will meed a 7441/74141 with either chip anyway. I
built my 1st 6 digit nixie clock with 17 TTL ic's earlier this year. You
can see the photos at http://www.tuberadios.com

You can purchase a preprogrammed PIC ic's that will need 2 7441's. If you
want more info, let me know. I have been on this nixie tube quest for a
while.

Regards,
Sal Brisindi
Click to expand...

Very nifty, your Nixie clocks. The 1-digit bird house clock is
innovative. Never saw such before.

Your TTL clock looks a lot like my first digital clock. Lots of chips
on one side of the board and a rat's nest on the other side. ;-) There
were no 7-seg LED displays when I built my TTL clock so I used
incandescent 7-segment displays. I had some thumbwheel switches I'd
liberated while in the service and I used those to dual purposes: to set
the alarm time and to set the clock. Dial in the desired time, flip a
switch, and the clock counted until it reached the desired display.
Flip the switch back and the clock began counting from there. I was one
of very few people who thought the method was cool.

I noticed the time displayed in the pic of your Nixie clock was
"oh-one-something". Your next assignment is to implement leading zero
suppression. :)
 
Yikes. Just checked with Unicorn electronics
(http://unicornelectronics.com/prod.htm) and they do have the 5314 and
the 74C195, but $13 for the former and $8 for the latter. Are these
obsolete things really that expensive?

-Tim

Tim M wrote:
The MM5314 plus converter might work...would only add one chip to my
design. Where can the 5314s be had?

Thanks,

Tim

Sal Brisindi wrote:

Tim,
Good luck finding them, I've been looking for the MM5311's for a
while. You
can still get the MM5314's but you will need the 74C915 7 Segment to BCD
converter chip. Plus you will meed a 7441/74141 with either chip
anyway. I
built my 1st 6 digit nixie clock with 17 TTL ic's earlier this year. You
can see the photos at http://www.tuberadios.com

You can purchase a preprogrammed PIC ic's that will need 2 7441's. If you
want more info, let me know. I have been on this nixie tube quest for a
while.

Regards,
Sal Brisindi

Tim M wrote:


Looking for some MM5311 clock chips (with BCD outputs). I'm using this
for a Nixie tube clock project and this seems the simplest way to do
things without requiring a lot of unwanted chips.

Anyone know where I can get such things?

Thanks,

Tim
Click to expand...
 
Tim M wrote:
Yikes. Just checked with Unicorn electronics
(http://unicornelectronics.com/prod.htm) and they do have the 5314 and
the 74C195, but $13 for the former and $8 for the latter. Are these
obsolete things really that expensive?
Click to expand...

Heh! I was at Unicorn Electronics in Johnson City, NY just this
morning. I try not to avoid shopping there because everything is always
tres expensive .... but I really-really needed something.
 
Tim M wrote:

Looking for some MM5311 clock chips (with BCD outputs). I'm using this
for a Nixie tube clock project and this seems the simplest way to do
things without requiring a lot of unwanted chips.

Anyone know where I can get such things?
Click to expand...
"Sal Brisindi" <salb203@optonline.net> wrote in message
<news:3FB98ACB.BBEEA799@optonline.net>:
Tim,
Good luck finding them, I've been looking for the MM5311's for a while. You
can still get the MM5314's but you will need the 74C915 7 Segment to BCD
converter chip. Plus you will meed a 7441/74141 with either chip anyway. I
built my 1st 6 digit nixie clock with 17 TTL ic's earlier this year. You
can see the photos at http://www.tuberadios.com

You can purchase a preprogrammed PIC ic's that will need 2 7441's. If you
want more info, let me know. I have been on this nixie tube quest for a
while.
Click to expand...
Actually, other members of the MM53xx have BCD output (multiplexed), so you
don't need the converter. But if you want to de-multiplex and direct drive
your nixies, you'll need to latch the BCD data. This isn't actually necessary
though, as the multiplex drive can be used as-is with the only penalty being
lower maximum apparent brightness of the nixies (usually not a problem
indoors).

IC's similar to the MM5314 include MM5309, MM5311, MM5312, MM5313, and MM5315.
All of these except the MM5314 have BCD output. Each has a slightly different
feature set: MM5309 has Reset, MM5311 has Hold, MM5312 has 1pps output but
only 4-digit display, MM5313 has 1pps out and Hold, MM5314 has 7-segment
output only with Output Enable (display blanking) and Hold, MM5315 has Hold
and Reset.

--
--------------------

Alan "A.J." Franzman

Email: a.j.franzman at verizon dot net

--------------------
 
Tim,
Yes, these old clock ics are getting very expensive now a days. You won't find
the MM5314 any cheaper than Unicorn electronics for $13.00.

Sal

Tim M wrote:

Yikes. Just checked with Unicorn electronics
(http://unicornelectronics.com/prod.htm) and they do have the 5314 and
the 74C195, but $13 for the former and $8 for the latter. Are these
obsolete things really that expensive?

-Tim

Tim M wrote:
The MM5314 plus converter might work...would only add one chip to my
design. Where can the 5314s be had?

Thanks,

Tim

Sal Brisindi wrote:

Tim,
Good luck finding them, I've been looking for the MM5311's for a
while. You
can still get the MM5314's but you will need the 74C915 7 Segment to BCD
converter chip. Plus you will meed a 7441/74141 with either chip
anyway. I
built my 1st 6 digit nixie clock with 17 TTL ic's earlier this year. You
can see the photos at http://www.tuberadios.com

You can purchase a preprogrammed PIC ic's that will need 2 7441's. If you
want more info, let me know. I have been on this nixie tube quest for a
while.

Regards,
Sal Brisindi

Tim M wrote:


Looking for some MM5311 clock chips (with BCD outputs). I'm using this
for a Nixie tube clock project and this seems the simplest way to do
things without requiring a lot of unwanted chips.

Anyone know where I can get such things?

Thanks,

Tim
Click to expand...
 
Michael,
Thanks for checking out my clocks, actually I like a leading zero on the 10's of
hour display. It will be a easy "fix" to eliminate the leading zero if I wanted,
all I have to do is disconnect the zero cathode! Ta Da.... :)

Regards,
Sal


Michael wrote:

Very nifty, your Nixie clocks. The 1-digit bird house clock is
innovative. Never saw such before.

Your TTL clock looks a lot like my first digital clock. Lots of chips
on one side of the board and a rat's nest on the other side. ;-) There
were no 7-seg LED displays when I built my TTL clock so I used
incandescent 7-segment displays. I had some thumbwheel switches I'd
liberated while in the service and I used those to dual purposes: to set
the alarm time and to set the clock. Dial in the desired time, flip a
switch, and the clock counted until it reached the desired display.
Flip the switch back and the clock began counting from there. I was one
of very few people who thought the method was cool.

I noticed the time displayed in the pic of your Nixie clock was
"oh-one-something". Your next assignment is to implement leading zero
suppression. :)
Click to expand...
 
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