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louarnold
Joined: 13 May 2010
Posts: 42
Location: Ottawa, Canada
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| CCS PIC16F877A prototyping board schematic |
 Posted: Thu May 13, 2010 8:49 pm |
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This was probably asked before, but I can find no info:
I would like a schematic of the CCS PIC16F877A prototyping board. This board has the PIC16F877A ( a square chip) soldered onto the board, a stereo jack (3.5mm), a 9 V power input, RJ12 (6 conductor) jack, potentiometer and 3 LEDs (red, yellow, green).
I have a stereo to PC serial cable schematic, but I need to make something to go from my laptop (USB or teleco jack) to the stereo jack.
Lou. |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Thu May 13, 2010 9:16 pm |
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For your laptop, which doesn't have a DB-9 Com Port, you need to buy
a USB-to-Serial Adapter. Something like this:
http://www.siig.com/ViewProduct.aspx?pn=JU-CB1S12-S3
Some brands of this type of adapter sell for as little as $10 USD. |
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louarnold
Joined: 13 May 2010
Posts: 42
Location: Ottawa, Canada
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| Posted: Thu May 13, 2010 11:30 pm |
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That's good. I assume there is some electronics in the cable, for the signal conversion?
Is a cable from the RJ12 telco jack to stereo plug also possible? any easier? |
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MikeP
Joined: 07 Sep 2003
Posts: 49
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louarnold
Joined: 13 May 2010
Posts: 42
Location: Ottawa, Canada
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| Posted: Fri May 14, 2010 8:46 am |
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Thanks for the reference to the RJ12 port, but it's not really what I wanted.
Let me rephrase: My laptop has a phone jack (I assume RJ12). I was asking if I could connect from there to the stereo jack on the prototype board. The laptop runs Vista.
And I guess I still need the schematic for the board itself. The school only bought the board for us as individuals and not the software that would have the schematic (as I understand it). Can someone give me an alternate source?
Thanks |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19520
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| Posted: Fri May 14, 2010 9:31 am |
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I think this is the Software prototyping board.
If so, the 3.5mm jacks, implement serial ports, which can't connect to the 3.5mm jack on your laptop. They will (with the right wiring), attach to the USB-serial adapters, already pointed out by PCM programmer.
Just because things use the same connector, does not make them compatible.
Best Wishes |
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SherpaDoug
Joined: 07 Sep 2003
Posts: 1640
Location: Cape Cod Mass USA
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| Posted: Fri May 14, 2010 10:27 am |
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| Quote: | | Let me rephrase: My laptop has a phone jack (I assume RJ12). I was asking if I could connect from there to the stereo jack on the prototype board. The laptop runs Vista. |
A laptop is likely to have two types of rectangular "phone" style jacks. A wider one is for Ethernet. A narrower one is for a POTS telephone modem. Neither one is going to interface with your prototyping board. You need RS232 which is going to come from either a DB9 connector on the laptop, or a USB connector with a USB to RS232 adapter.
_________________
The search for better is endless. Instead simply find very good and get the job done. |
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louarnold
Joined: 13 May 2010
Posts: 42
Location: Ottawa, Canada
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| Posted: Sat May 15, 2010 12:06 am |
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| Ttelmah wrote: | I think this is the Software prototyping board.
If so, the 3.5mm jacks, implement serial ports, which can't connect to the 3.5mm jack on your laptop. They will (with the right wiring), attach to the USB-serial adapters, already pointed out by PCM programmer.
Just because things use the same connector, does not make them compatible.
Best Wishes |
Haha. well put. The telco jack on the laptop is likely used by an internal modem. I just never used it so far. The 3.5 mm jacks are for audio. Its the 3.5mm to usb RS232 adapter that I need, |
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louarnold
Joined: 13 May 2010
Posts: 42
Location: Ottawa, Canada
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| Posted: Sat May 15, 2010 12:12 am |
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| SherpaDoug wrote: | | Quote: | | Let me rephrase: My laptop has a phone jack (I assume RJ12). I was asking if I could connect from there to the stereo jack on the prototype board. The laptop runs Vista. |
A laptop is likely to have two types of rectangular "phone" style jacks. A wider one is for Ethernet. A narrower one is for a POTS telephone modem. Neither one is going to interface with your prototyping board. You need RS232 which is going to come from either a DB9 connector on the laptop, or a USB connector with a USB to RS232 adapter. |
Yep. You are right. See my post to Ttelmah.
So... Anyone got a schematic for the adapter?
And then the schematic for the PIC16F877A prototyping board? |
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