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| Search found 7 matches |
| Author | Message |
|---|---|
 Topic: Reverse polarity protection |
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| frankb Replies: 3 Views: 12066 |
 Forum: General CCS C Discussion Posted: Thu Jun 10, 2004 7:39 pm Subject: Reverse polarity protection |
| See this link for a scheme using a single p-channel mosfet. The penalty in voltage drop is on the order of millivolts for a typical embedded control circuit.
http://electronicdesign.com/power/fet-s ... |
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| Topic: MCLR doesn�t restart the code (include schematics) Why? |
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| frankb Replies: 47 Views: 75028 |
Forum: General CCS C Discussion Posted: Wed May 19, 2004 7:54 am Subject: MCLR doesn�t restart the code (include schematics) Why? |
| Where is the current limiting resistor between the base of Q1 and RA4? If there is one, I haven't found it anywhere on your schematic. Now you're telling us that although the transistor is drawn inc ... | |
| Topic: MCLR doesn�t restart the code (include schematics) Why? |
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| frankb Replies: 47 Views: 75028 |
Forum: General CCS C Discussion Posted: Wed May 19, 2004 7:31 am Subject: Use the data sheet |
| As I pointed out a few days ago Q1 (and Q2) are connected wrong AND pinned out wrong. Per the data sheet:
pin1 -> Emitter pin2 -> Collector pin3 -> Base Pin 1 is on the left side of the ... |
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| Topic: MCLR doesn�t restart the code (include schematics) Why? |
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| frankb Replies: 47 Views: 75028 |
Forum: General CCS C Discussion Posted: Sat May 15, 2004 7:14 am Subject: Didn't mean to offend you |
Sorry Helyos  . I was just pointing out some errors that could be causing you problems. If you're comfortable with the way you draw schematics then you are welcome to keep doing it that way. ... |
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| Topic: MCLR doesn�t restart the code (include schematics) Why? |
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| frankb Replies: 47 Views: 75028 |
Forum: General CCS C Discussion Posted: Fri May 14, 2004 11:48 pm Subject: MCLR doesn�t restart the code (include schematics) Why? |
| One thing jumps out. Q1 and Q2 are pinned out wrong AND are connected wrong as drawn. These aren't related to the reset problem but without a thorough H/W design check how many other things might be ... | |
| Topic: Problem with #use rs232 |
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| frankb Replies: 3 Views: 15837 |
Forum: General CCS C Discussion Posted: Sat Dec 13, 2003 12:17 pm Subject: Problem with #use rs232 |
| Hi Gonz,
You might try adding the FLOAT_HIGH and ENABLE= (pin) options to your #USE rs232 directive. Add a resistor (1K to 10K) between your TX pin and the one you assign as ENABLE. I haven't tried ... |
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| Topic: memory allocation |
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| frankb Replies: 12 Views: 32303 |
Forum: General CCS C Discussion Posted: Tue Oct 07, 2003 3:28 pm Subject: memory allocation |
| I had this problem with a 12F629 and it started behaving after I added #device *=16 to the header file. If you're using PCM try this. Place the statement right after the first line in your header fi ... | |
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