Timeline for Resistor for open-collector transistor
Current License: CC BY-SA 4.0
8 events
| when toggle format | what | by | license | comment | |
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| Apr 5, 2023 at 21:48 | comment | added | periblepsis | @SergioPiccione The resistors mentioned by Andy are fine. You 'could' add a BJT (or two or three, etc.) The extra BJT allows me another degree of flexibility and the possibility to protect your I/O pin from a single part failure (short, for example.) But you've not mentioned anything to suggest a need for that. I think the divider will be fine. Just don't use a screwdriver and accidentally short out the upper resistor in the divider! | |
| Apr 5, 2023 at 20:28 | comment | added | Sergio Piccione | i will consider that, you think an NPN common emitter BC548 could work ? | |
| Apr 5, 2023 at 20:10 | comment | added | periblepsis | @SergioPiccione Oh. Then Andy's suggestion about a divider could work. Or a different circuit using another BJT. Personally, I'd use an added BJT circuit. But it can be made to work with dividers. | |
| Apr 5, 2023 at 20:09 | comment | added | Sergio Piccione | nono i have access to the correct voltage supply, just interested in the output | |
| Apr 5, 2023 at 20:08 | comment | added | periblepsis | @SergioPiccione Then you will need a 12 V to 24 V supply. No getting around that, without deciding to first ignore the specifications and then perform some testing on the device to see if it can be made to work on 5 V. Do you have access to the appropriate voltage supply? Or only to 5 V? | |
| Apr 5, 2023 at 20:07 | comment | added | Sergio Piccione | yes i know i buyed the wrong one, too late for that, i was asking if i could fix that, so i have to put a voltage divider, i was thinking to a op amp inverter with negative reaction | |
| Apr 5, 2023 at 19:58 | history | edited | periblepsis | CC BY-SA 4.0 |
added 2 characters in body
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| Apr 5, 2023 at 19:38 | history | answered | periblepsis | CC BY-SA 4.0 |