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Offline Homefire
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« Reply #20 on: April 10, 2015, 05:34:53 am »
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  If you do one for your self, please do one for me.   I will build on Vero Board.

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« Reply #21 on: April 10, 2015, 10:07:45 am »
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Quote:Posted by homefire
 If you do one for your self, please do one for me.   I will build on Vero Board.

Consider it done. Will ship tomorrow. Pm me address.

Dusty Carl

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« Reply #22 on: April 11, 2015, 10:52:15 am »
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  What If I don't have the 2oMhz crystal?   Can I go lower ?

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« Reply #23 on: April 11, 2015, 11:19:43 am »
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Quote:Posted by homefire
  What If I don't have the 2oMhz crystal?   Can I go lower ?

Not having the .asm file hard to tell. Looks like he is just measuring the frequency/phase or amplitude of the 18-22 khz oscillator. Anyone else know?

Dusty Carl

Posted on: April 11, 2015, 10:13:36 am
H i  Saromines,
Is the assembly file or C file avaliable?

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« Reply #24 on: April 11, 2015, 11:26:28 am »
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I have CB crystals. 27 and some.  I even have some a bit lower.  All I can see in the schematic is it would change the Audio out put and effect the detector out put.

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« Reply #25 on: April 11, 2015, 11:46:39 am »
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No you will need to use the 20Mhz crystal.....why? because that's how it was designed. If you do not have one I'll send you one but please don't start changing things. 

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So many questions so little time
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« Reply #26 on: April 11, 2015, 11:48:14 am »
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The 12F675 is rated at 20 MHz max, but I have operated them at 40 and 50 MHz. You have to change the software if you are using any timers or delay routines. The chip divides the internal or external oscillator by 4 to run the instruction set. 20 MHz means 5 million ips. Best bet is get a 20 MHz crystal or clock osc module of eBay. I prefer the clock module because of size,  nothing to build and get working, works first time evertime, and they are inexpensive.

Dusty Carl

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« Reply #27 on: April 11, 2015, 12:03:05 pm »
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Ok 20 Mhz it is.  X if you have one that's good .  I will have to find one.

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« Reply #28 on: April 11, 2015, 01:26:50 pm »
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Homie,
Latch on to this deal. 20 MHz clock oscillator module. $3.99 for 5. Ships from Texas. Fits 8 pin dip socket.   www://r.ebay.com/sUrB8D


Posted on: April 11, 2015, 12:04:50 pm
I must be a real good salesman or just plain crazy. Idiot I just ordered a package for myself. Should be here Monday. It's a good deal

Dusty Carl


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« Reply #29 on: April 11, 2015, 04:05:30 pm »
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Can you just use two pins?   


Posted on: April 11, 2015, 03:08:33 pm
  X can send one.   I have time.

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