Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision | Next revision Both sides next revision | ||
|
wiki:tcb:tcbinstall:io_ports_ab [2021/03/19 19:30] opadmin [Using an I/O Port as Output] |
wiki:tcb:tcbinstall:io_ports_ab [2021/03/20 01:07] opadmin [Using an I/O Port as Output] |
||
|---|---|---|---|
| Line 34: | Line 34: | ||
| If you wish to connect the output to another microcontroller (such as another Arduino) you can do so directly - just connect the signal pin of the I/O port to the input pin of your other controller, and also make sure both the TCB and the other controller share a ground connection. | If you wish to connect the output to another microcontroller (such as another Arduino) you can do so directly - just connect the signal pin of the I/O port to the input pin of your other controller, and also make sure both the TCB and the other controller share a ground connection. | ||
| + | |||
| + | {{ wiki: | ||
| However keep in mind these outputs are only rated at 40mA each. For LEDs with standard specifications of around 20mA they can work without any other components, but otherwise these ports will almost surely be inadequate for driving high current lights, relays or other devices. For that you will need to add an external transistor or MOSFET circuit. A simple 2n2222 transistor circuit will work and there are many schematics on the internet. Or see the [[wiki: | However keep in mind these outputs are only rated at 40mA each. For LEDs with standard specifications of around 20mA they can work without any other components, but otherwise these ports will almost surely be inadequate for driving high current lights, relays or other devices. For that you will need to add an external transistor or MOSFET circuit. A simple 2n2222 transistor circuit will work and there are many schematics on the internet. Or see the [[wiki: | ||