Timeline for Analog input for ADC with multiple potentiometers noise
Current License: CC BY-SA 4.0
15 events
| when toggle format | what | by | license | comment | |
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| Jan 30, 2022 at 19:51 | history | edited | JRE | CC BY-SA 4.0 |
added 35 characters in body; edited title
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| Jan 30, 2022 at 15:09 | answer | added | Justme | timeline score: 1 | |
| Jan 30, 2022 at 15:04 | comment | added | Justme | You should have mentioned that Arduino Nano in the first place and edited it in the question. 100k pots are just bad choise and the diodes make it just worse. | |
| Jan 30, 2022 at 14:12 | history | edited | KellerDev | CC BY-SA 4.0 |
added 217 characters in body
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| Jan 30, 2022 at 11:50 | comment | added | KellerDev | I'm using the Arduino Nano. I am aware that I could use the internal mux, or add some myselft, but decided to try this approach as an alternative. Without going into too much detail, this will help me in other aspects of the whole project. As for the open collector inverter IC, I hadn't heard of thouse. Sounds like it could be of help I'll have a look at it. | |
| Jan 30, 2022 at 11:21 | history | edited | KellerDev | CC BY-SA 4.0 |
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| Jan 30, 2022 at 9:50 | comment | added | Justme | Which DAC? If it does not have enough channels, why do you use it, or don't multiplex them yourself with a mux? Many MCUs also can have 16 analog input channels so maybe you are trying to use too small MCU for tje job. | |
| Jan 30, 2022 at 8:44 | vote | accept | KellerDev | ||
| Jan 30, 2022 at 8:44 | |||||
| Jan 29, 2022 at 23:11 | comment | added | Ian Bland | I'd be inclined to use analogue switches, like a couple of 4051s. | |
| Jan 29, 2022 at 22:56 | comment | added | jsotola | you could use an open collector inverter IC, instead of discrete transistors, in the right circuit | |
| Jan 29, 2022 at 22:54 | answer | added | TonyM | timeline score: 3 | |
| Jan 29, 2022 at 22:12 | comment | added | DKNguyen | @dandavis OP Is applying 5V to only one pot at a time while the others are have 0V applied. That's why the diodes are there. | |
| Jan 29, 2022 at 22:04 | comment | added | dandavis | do you need the diodes on the one on the right? 100k tot he base is a bit low, might be better to use 1-10k to really pull the collector to ground at the same level accounting for minor transistor HFE variations. | |
| S Jan 29, 2022 at 21:52 | review | First questions | |||
| Jan 29, 2022 at 22:32 | |||||
| S Jan 29, 2022 at 21:52 | history | asked | KellerDev | CC BY-SA 4.0 |