Kwak-Clock Mod

[colonelkernel8]

Ok, well, over my vacation I worked up a pcb for the kwak clock on my flights, so I'll upload them as soon as I can (ill have to take them off my laptop).

 

[colonelkernel8]

Here is the schematic for the Kwak Clock in Eagle format.

http://www.savefile.com/files/596646

Feel free to improve it, or make your own PCB (make sure you post it too

)

As it turns out, the PCB I designed had a huge, huge flaw in it, so I am scrapping it and starting from scratch (it was a crappy 15 minute job anyway).

Note about the schematic, the two 2.2mH inductors are removed.

 

[colonelkernel8]

After a long break, I'd like to rekindle our discussion here.

http://home.quicknet.nl/qn/prive/ra...._clock_en.html

I think that design has a lot of potential, compact layout with a ground plane. Maybe convert it to accept SMD.

 

[Crowbar]

Now if we only had KC8 schematic...

 

[colonelkernel8]

Quote:

Originally Posted by Crowbar /img/forum/go_quote.gif Now if we only had KC8 schematic...

I thought KC8 was only myth.

 

[Crowbar]

My understanding was only that schematics weren't available, and that Elso was selling built versions. Why did you think it was a myth?

BTW, I've attached another clock that I've heard is quite good.

 

[colonelkernel8]

Quote:

Originally Posted by Crowbar /img/forum/go_quote.gif My understanding was only that schematics weren't available, and that Elso was selling built versions. Why did you think it was a myth? BTW, I've attached another clock that I've heard is quite good.

I wish I could read that schematic, cant read the names of the IC's...care to translate the schematic to Eagle?

 

[Crowbar]

I don't know Russian, but only one of the ICs is in Cyrillic: 100LP116, which is supposedly a better performing version of the MC10116. The other ICs turn up in Google search; they're available in North America. The comments about OSCON SM series caps, and X7R for the ceramics, are obvious. Then something about resistors, 1206 which is surface mount, 5%. Something about 0.3 cm^2 and 0.5 cm^2 PCB heatsinking planes for the DA1 and DA2 regulators, correspondingly. Last comment is crystal brand recommendations in HC49 (personally I use custom low jitter crystals that ICM made for me). The second to last comment I don't have a clue about, however: something 100 pF about the DA3 comparator.

Keep in mind, as in any clock, PCB layout is critical.

 

[colonelkernel8]

I am working on an eagle version of kwak clock (single regulated supply) that is all ground plane. How do I adjust the spacing of the ratsnest from the traces?

 

[Crowbar]

I think it's done by using the 'change' tool (spanner icon).

I suggest you try dual ground planes (top and bottom); it provides good shielding. Don't use long traces as they act like transmission lines and won't behave properly unless they have correct terminations (you'd get reflections otherwise).

For a simple circuit like this clock, I'd just create a 3D structure without PCB, as I can minimize all connection lengths.

 

[colonelkernel8]

Quote:

Originally Posted by Crowbar /img/forum/go_quote.gif I don't know Russian, but only one of the ICs is in Cyrillic: 100LP116, which is supposedly a better performing version of the MC10116. The other ICs turn up in Google search; they're available in North America. The comments about OSCON SM series caps, and X7R for the ceramics, are obvious. Then something about resistors, 1206 which is surface mount, 5%. Something about 0.3 cm^2 and 0.5 cm^2 PCB heatsinking planes for the DA1 and DA2 regulators, correspondingly. Last comment is crystal brand recommendations in HC49 (personally I use custom low jitter crystals that ICM made for me). The second to last comment I don't have a clue about, however: something 100 pF about the DA3 comparator. Keep in mind, as in any clock, PCB layout is critical.

What are the pins on the right? Other than the +9v.

 

[Crowbar]

X1 is +9V, X4 is ground, and X2 and X3 are the inverted and non-inverted outputs. You can use both if you like balanced clock signal

Note the 10LC116 is a single chip with three sections, and so only one of the ICs is used in the clock; the numbers by the connections are pin assignments.

 

[colonelkernel8]

Here is the initial version of my board for the kwak clock.

 

[colonelkernel8]

I am working on an SMD version, then I will start work on the Lynx Clock.

 

[guzzler]

Whilst the effort is admirable, have you checked with Elso before publishing this? Firstly, it is only polite, and secondly he's had objections to this in the past - DIY means DIY to him, which is fair enough. If you don't want to go to the effort and expense of designing AND TESTING your own layout and keeping it your own, I don't see why he shouldn't take something back for his "official" board.

Just something to think about...