Where do I get the information to update device parameters?

When I add a part, example LED, how do the parameters shown on the device's data sheet translate to the device's Edit Parameters in circuitLab?

by Apmckinney0383
October 15, 2020

Edit Parameters has: I_S = 1e-9 A R_S = 3 ohms N:3 TT:1e-15s (Where do I find these on the device data sheet?)

by Apmckinney0383
October 15, 2020

Hi @APmckinney0383, have you already seen this discussion https://www.circuitlab.com/forums/general-electronics-discussion/topic/6vu3zs7w/how-to-add-an-anonymous-led/ which talks about the general process of curve-fitting to find these parameters for an LED?

The parameters are NOT going to be found on a datasheet. Especially for LEDs, which are very loosely specced.

Instead, we curve-fit, tweaking I_S, N, and R_S until this DC Sweep looks similar to your datasheet. For example:

Try this simulation, and then tweak those three parameters until it matches a curve from your datasheet.

by mrobbins
October 15, 2020

Thanks Mike, I wasn't expecting one of the founders of the company to respond. I'd like to reach out to you off line to discuss the initiative I'm developing and you're tool can play a major part of this enterprise. I'd like to share my thoughts with you. I don't want to provide my email on this forum so I'll reach out via your, "Contact Us", interface.

by Apmckinney0383
October 16, 2020
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