There is actually. I got a CD4536B Programmable Timer chip to give a 1Hz output

I knew there was another part, but couldn't remember it on the fly. Plus, it's in my library only as a MC14536, so I missed it. I have used the 4536; it's a fun part.

ak

 

I knew there was another part, but couldn't remember it on the fly. Plus, it's in my library only as a MC14536, so I missed it. I have used the 4536; it's a fun part.

ak

Thanks!

 

Thanks!

I still can't get this sim to work since it can't find the xtal_par.sub

 

Do you have the sub file in the search path of the simulator?

 

Do you have the sub file in the search path of the simulator?

I am not sure about the sub file.

Where it says "Open Symbol" I have this

C:\Users\home\AppData\Local\Ltspice\lib\sym\ZZZ\QUARTZ_CRYSTAL\XTAL_par.asy

 

If all you want or need is a 1.0 MHz oscillator and if you are located in the US I can send you one of these. It's a 1.0 MHz oscillator symmetrical square wave out XO-52B but it is 5.0 volt logic. 1.0 MHz +/- 0.01% (100 PPM) accuracy. I have several and US postage is on me, I doubt I will ever need the several I have laying around. My wife likes it when things actually go away rather than come into the house. Just remember, see the data sheet I linked to, it's a 5.0 volt device.

Ron

 

If all you want or need is a 1.0 MHz oscillator and if you are located in the US I can send you one of these. It's a 1.0 MHz oscillator symmetrical square wave out XO-52B but it is 5.0 volt logic. 1.0 MHz +/- 0.01% (100 PPM) accuracy. I have several and US postage is on me, I doubt I will ever need the several I have laying around. My wife likes it when things actually go away rather than come into the house. Just remember, see the data sheet I linked to, it's a 5.0 volt device.

Ron

Hi Ron:

That would be awesome but I live an hour west of Toronto.

M

 

If all you want or need is a 1.0 MHz oscillator and if you are located in the US I can send you one of these. It's a 1.0 MHz oscillator symmetrical square wave out XO-52B but it is 5.0 volt logic. 1.0 MHz +/- 0.01% (100 PPM) accuracy. I have several and US postage is on me, I doubt I will ever need the several I have laying around. My wife likes it when things actually go away rather than come into the house. Just remember, see the data sheet I linked to, it's a 5.0 volt device.

Ron

That is very kind of you.
I am now checking my stock.
I have these oscillator modules:
9.8304MHz (half size)
500kHz and 8MHz output in same unit (DIP-14 footprint)

I can send to the TS.

 

Shouldn't those command lines be .include or .lib instead of .using?

You need both the symbol and the library/sub/model file.

Personally, I place all of my aftermarket/custom symbols/subs in separate folders and use the control panel to place them in the search path...keeps things more organized.

 

I can send to the TS.

Now we have both sides of the pond covered.

Ron

 

Now we have both sides of the pond covered.

Ron

I am an hour drive away from TS. It's a small pond. I am closer to you than you think.

 

Shouldn't those command lines be .include or .lib instead of .using?

You need both the symbol and the library/sub/model file.

Personally, I place all of my aftermarket/custom symbols/subs in separate folders and use the control panel to place them in the search path...keeps things more organized.

Thanks. Yes, I don't why I had ".using". I will work on this.

 

Below is a circuit that should work to give a 1Hz pulse from a 10MHz clock:
It uses a high speed 74HC390 configured as a ÷10 counter followed by two CD4040 counters configured as ÷1000 each to give a total ÷10Meg division, 1ms pulse at the output (6 ICs total)
The clocked flip-flops are to ignore the glitches that can occur from decoding the ripple counter outputs with the AND gate.

The CD4040's are decoded by the AND gate at 9999 counts with the final count provided by the reset flip-flop.

Edit: Corrected typos. The CD4040's are divide by 1000, not 100.

 

Below is a circuit that should work to give a 1Hz pulse from a 10MHz clock:
It uses a high speed 74HC390 configured as a ÷10 counter followed by two CD4040 counters configured as ÷100 each to give a ÷10Meg division, 1ms pulse at the output (6 ICs total)
The clocked flip-flops are to ignore the glitches that can occur from decoding the ripple counter outputs with the AND gate.

The CD4040's are decoded by the AND gate at 999 counts with the final count provided by the reset flip-flop.
View attachment 313567

Thanks!

 

I am an hour drive away from TS. It's a small pond. I am closer to you than you think.

That you I hear in the attic?

Ron

 

That you I hear in the attic?

Ron

I am still trying to get the following simulation working. But no luck!

The symbols are in this path:
C:\Users\mypc\AppData\local\LTspice\lib\sym\ZZZ\QUARTZ_CRYSTAL

and the sub library is in this path:
C:\Users\mypc\AppData\local\LTspice\lib\sub

 

See

 

See
View attachment 313609

Thanks Bordodynov.

It would be really helpful if I had someone's actual .asc file. A picture does not help. I suspect that
the problem I am having is with the path and/or the parameters in the CD4060B Component
Attribute Editor.

M

 

Buy this Clock Mechanism for $1.24
and use its miniature quartz electronics block:

 

Danko posted first. I recall disassembling several table clocks; some giving a 2 Hz pulse and others of 1 Hz.