T O P I C R E V I E W |
Fonggong |
Posted - 05/18/2017 : 23:45:02 I want to be able to reset a PIC remotely using the only communication port of the board, the RS232. But I also want to be able to program it using a ICD3 (no bootloader), and this programmer apparently applies high voltage (0-13V?) to /MCLR which will certainly kill the MAX232(MAX233 in fact).
Would a schottky between R2out of the MAX233 and 5V be the way to go? The datasheet says that the absolute maximum voltage on that pin is 5.3V, I find it a bit tight for a schottky. Any more robust suggestions? I don't want to use a jumper as this could be forgotten...
Schematic:
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7 L A T E S T R E P L I E S (Newest First) |
supervizeur |
Posted - 06/12/2017 : 11:17:50 quote: Originally posted by anniel
quote: Originally posted by supervizeur
Successful?
We may never know.
Probably. |
anniel |
Posted - 06/09/2017 : 06:29:33 quote: Originally posted by supervizeur
Successful?
We may never know. |
supervizeur |
Posted - 06/04/2017 : 02:54:14 Successful? |
anniel |
Posted - 05/29/2017 : 09:31:09 Did they try??? |
supervizeur |
Posted - 05/29/2017 : 07:27:51 Yes a Zener should be good. |
anniel |
Posted - 05/19/2017 : 05:35:00 A Zener should do the trick. |
Fonggong |
Posted - 05/18/2017 : 23:46:56 More details about MAX232 here: www.kynix.com/Detail/581629/MAX232.html |