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javanismechimol

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Joined: 15 Apr 2014
Posts: 9
PostPosted: Wed Dec 10, 2014 1:48 pm    Post subject: Reply with quote
EDC wrote:
The code presented half a year ago, lacked the configuration for that port to be configured as an output. Now Javanismechimol wrote that the code is already running. August guess that completed the missing config in the code.
I'd like to now turn our attention to that in the control circuit, there are two LEDs, one after the other with a 10k resistor and the voltage is only 5V.
When damaged TIP41 can damage the microcontroller. No protection for the re-voltage


hahahaah, you right, actually i'm not use 10k resistor. Smile
can you tell me how to protect the microcontroller ?
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EDC

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Joined: 26 Mar 2014
Posts: 1133

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PostPosted: Wed Dec 10, 2014 2:57 pm    Post subject: Reply with quote
This is cheap and work for most cases.

Anything is better than nothing Very Happy
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Dibor

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Joined: 04 Dec 2004
Posts: 137
Location: ISRAEL
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PostPosted: Wed Dec 10, 2014 3:32 pm    Post subject: Reply with quote
Or schottky diode in series with resistor anode to micro pin, cathode through resistor to base of transistor.

Smile
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EDC

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Joined: 26 Mar 2014
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PostPosted: Wed Dec 10, 2014 3:39 pm    Post subject: Reply with quote
Yes for outputs that drive with HI-> But sometimes must then remmember to discharge gate of transistor for switch OFF
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javanismechimol

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Joined: 15 Apr 2014
Posts: 9
PostPosted: Wed Dec 10, 2014 5:40 pm    Post subject: Reply with quote
EDC wrote:
This is cheap and work for most cases.

Anything is better than nothing Very Happy


ok thanks for information, i will try later...
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