Timeline for Will plugging in a 12v power supply in the wrong polarity to a CNC SHIELD fry my circuit or damage my power supply?
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 28, 2020 at 19:00 | comment | added | Arav Raja | Thank you so much I followed all the steps and i've got the polarity now !! | |
| Nov 28, 2020 at 18:59 | vote | accept | Arav Raja | ||
| Nov 28, 2020 at 14:16 | comment | added | Majenko | You would need 2 batteries and small resistor to get the polarity of the LED. 1.5V won't be enough. | |
| Nov 28, 2020 at 13:10 | comment | added | Arav Raja | Oh yes I completely forgot about that!! Would connecting the RGB LED to a single double AA battery (as you can see my supplies are very very limited :) ) work to test if its a cathode or anode ? | |
| Nov 28, 2020 at 12:57 | comment | added | Majenko | That only relates to the connector at the end (which you have now cut off). The wire with the stripe might be negative, but it might not. You can only tell by testing it. For the RGB LED you need to know if it's "common anode" or "common cathode" to know how to wire it up | |
| Nov 28, 2020 at 12:55 | comment | added | Arav Raja | Hi, Thank you so much for the answer! I currently only have a RGB LED and a ton of 220Ω resistors whichI guess I could connect to the power supply (with a very messy circuit :)). Is there no way of knowing the polarity of the wires from the info on the power supply. It says its a centre-positive supply does this not mean anything ? | |
| Nov 28, 2020 at 12:26 | history | answered | Majenko | CC BY-SA 4.0 |