Timeline for Determining voltage and current changes to make components compatible with the voltage source
Current License: CC BY-SA 3.0
4 events
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| Sep 10, 2017 at 3:01 | comment | added | Harper - Reinstate Monica | @smeeb 1) either your knowledge/experience tells you this is the nature of the type of device, or you check its data sheet. 2) start by looking at the supply, a constant-voltage supply will fight changes in voltage, ditto -current. 3) and 4) Generally not unless you are engaged in sabotage. However a few devices can be overdriven with a nudge and a wink (CPUs, illumination LEDs). If an LED's spectral data is specified at 350ma but the data sheet says it's good to drive it to 1400ma, what's its rating? | |
| Sep 7, 2017 at 21:14 | comment | added | smeeb | I think if I understand these, I'll be able to make full sense of your answer! Thanks again so much! | |
| Sep 7, 2017 at 21:14 | comment | added | smeeb | Thanks so much @Harper (+1) - a few followup questions if you don't mind: (1) how do I tell if a particular device/component (battery, LED, buzzer, servo, etc.) is a constant voltage vs constant current device? (2) How do I tell whether a particular load will change the supply's voltage or its current? (3) Is it ever OK for supplied voltage to be greater than or equal to a device's rated forward voltage? And finally (4) Is it ever OK for supplied current to be greater than or equal to a device's rated forward current? | |
| Sep 7, 2017 at 21:05 | history | answered | Harper - Reinstate Monica | CC BY-SA 3.0 |