Timeline for Detecting cable is connected
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
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| Jan 22, 2023 at 2:31 | comment | added | Gil | Use pull up resistors on each button. On the receiving side you need to measure the voltage and see if you have several volts available. If all 4 buttons could be maintained then you need some delay. The other option is use one of the power leads as a return to your module. If using + add a pull down resistor and in hour controler measure the voltage. It could be conditioned and become a logic input. | |
| Jun 5, 2021 at 11:30 | comment | added | ErikR | Answer updated with transistor circuit. | |
| Jun 5, 2021 at 11:30 | history | edited | ErikR | CC BY-SA 4.0 |
added 181 characters in body
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| Jun 5, 2021 at 7:26 | comment | added | bedrock | But my ground is shared so a transistor might be the way | |
| Jun 5, 2021 at 7:22 | comment | added | bedrock | So it should work with a mcp23017 too ,by default im using external pullups so my butons pull down to ground | |
| Jun 5, 2021 at 4:53 | history | answered | ErikR | CC BY-SA 4.0 |