Timeline for How can I use a 2N2222 transistor as a temperature sensor?
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
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| Oct 7, 2020 at 4:26 | comment | added | tlfong01 | @csabahu, (1) Ah, I usually Yahoo to get the weather in my city: hk.news.yahoo.com/weather. (2) I do have a couple of thermometers. See update today (2020cot07) of my answer to see how I am using my digital thermometer. Cheers. | |
| Oct 6, 2020 at 19:31 | comment | added | csabahu | @tlfong01, What's the weather like in your city today? Have you tried the thermometer? | |
| Oct 6, 2020 at 3:54 | comment | added | tlfong01 | @csabahu, Ah, your colourful schematic is looking nice, and the opAmp Vout vs Temperature chart is impressively ideal. So I will search my jun bin for an opAmp and try it out. | |
| Oct 5, 2020 at 18:38 | comment | added | csabahu | Almost. A smaller potentiometer with which the ratio of the given resistors can be fine-tuned. For example, a 2k potentiometer between 47k and 10k. Here, it is not the absolute value of the resistance that is interesting, but the voltage setting of the non-inverting input. Of course, this is only needed if we want to calibrate the thermometer. | |
| Oct 5, 2020 at 18:03 | comment | added | Sredni Vashtar | You probably meant to write 'potentiometer' instead of resistor. | |
| Oct 5, 2020 at 16:48 | history | answered | csabahu | CC BY-SA 4.0 |