Timeline for Is this optocoupler-based circuit design reliable?
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Aug 3, 2018 at 14:23 | vote | accept | CommunityBot | ||
| Apr 27, 2018 at 17:37 | comment | added | user115094 | @OlinLathrop I understand perfectly what you said about R2, R3 and Q1. But let's imagine that we are going to include them. The 10 kOnm resistor, are you suggesting to remove it? | |
| Apr 26, 2018 at 17:33 | comment | added | Olin Lathrop | @CL. 1: Not true. 50 kHz is 20 us period. There are plenty of optos that can switch on and off in well under 10 us. 2: Stepper motors don't run at 50 kHz. 3: It is irrelevant anyway. I just re-read the whole question, and the OP has said nothing about 50 kHz. It is not a requirement. 4: A separate NPN with a 10 kOhm pulldown on its base, as the OP is proposing, isn't going to switch very fast either. | |
| Apr 26, 2018 at 17:00 | comment | added | CL. | A saturated phototransistor will not switch at 50 kHz. | |
| Apr 25, 2018 at 20:28 | history | answered | Olin Lathrop | CC BY-SA 3.0 |