Timeline for NTC resistor to balance ambient temperature change on precision current controlled lamp
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jan 29, 2023 at 10:32 | vote | accept | Christianidis Vasilis | ||
| Jan 28, 2023 at 16:05 | history | edited | Andy aka | CC BY-SA 4.0 |
added 484 characters in body
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| Jan 28, 2023 at 15:42 | comment | added | Andy aka | A 1 mV DC change in the ground plane between DAC and sense resistor would be very significant. I mean you have a 2mA error in 800 mA and a 1 mV change in ground-plane voltage would be a significant effect. | |
| Jan 28, 2023 at 15:41 | comment | added | Christianidis Vasilis | I edited the question adding the resistor and DAC information. Yes I want to change the DAC indeed if I find one with lower temp coefficient. And replace the sense resistor with one that has larger temperature coefficient (I talked about that in my 5th idea). Also, I have a single gnd pour on the bottom layer. I edited the question to add that info as well. So from what I understand, I will move the components closer (and around) the 0V of the sense resistor. | |
| Jan 28, 2023 at 15:24 | history | answered | Andy aka | CC BY-SA 4.0 |