Timeline for NPN Transistor choice
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 12, 2016 at 12:07 | vote | accept | alo48 | ||
| Dec 12, 2016 at 12:07 | comment | added | alo48 | Oh okay, it could be great but unfortunately I only have 2 meters! Thanks again, I put the subject to "solved". | |
| Dec 12, 2016 at 12:03 | comment | added | dim | Or use 74HC151, and connect up to 8 meters! Wow! | |
| Dec 12, 2016 at 12:01 | comment | added | dim | You need the R2 resistance as in the circuit you shown, twice (one for each meter). However, you don't need one at the output of the mux. I realize you may not like the tiny packaging of SN74LVC2G157. If you're more comfortable with DIP chips, use 74HC157 and tie all unused inputs to ground. | |
| Dec 12, 2016 at 11:54 | comment | added | alo48 | Thanks, I didn't know the 2-to-1 MUX but it seems to be what I need. Do I have to add a resistance to the circuit ? | |
| Dec 12, 2016 at 11:44 | history | edited | dim | CC BY-SA 3.0 |
added 95 characters in body
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| Dec 12, 2016 at 11:37 | history | answered | dim | CC BY-SA 3.0 |