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| en:hardware:homelab:communication:atmega128mod [2010/11/21 18:56] – raivo.sell | en:hardware:homelab:communication:atmega128mod [2020/07/20 09:00] (current) – external edit 127.0.0.1 |
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| When using the old Controller module (ATmega128) and version 5 Communication module following modification have to be performed to avoid conflicts of MAX232 drivers. | When using the old Controller module (ATmega128) and version 5 Communication module following modification have to be performed to avoid conflicts of MAX232 drivers. |
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| It is necessary to disconnect the MAX232 driver power supply on the Controller module. By using the soldering iron heat the pad 16 (see picture below) and blend the chip pin up with a small screw driver. All other pins of the MAX232 chip can be leaved as they are and in case of later need the supply pin can be easily connected again. | It is necessary to disconnect the MAX232 driver Rx1 on the Controller module. By using the soldering iron heat the pad 9 (see picture below) and bend the pin up with a small screw driver. All other pins of the MAX232 driver can be left as they are and in case of later need the disconnected pin can be easily connected again. |
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| [{{ :examples:communication:max232_pin16.jpg?580 |MAX232 chip and Rx1 pin}}] | [{{ :examples:communication:max232_pin9.jpg?580 |MAX232 driver and Rx1 pin}}] |
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| [{{ :examples:communication:max232_modification.jpg?580 |Heating and blending the pin up}}] | [{{ :examples:communication:max232_modification.jpg?580 |Heating and bending the pin up}}] |
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