| ??? 03/27/09 10:14 Read: times |
#163897 - Oh that is universally known Responding to: ???'s previous message |
Andy Neil said:
Sorry I accidentally pressed the 'Post' button too soon, leaving a blank message.
What I meant to post was: Ap Charles said:
PWM Dimming with SCR ?? , You cannot control the Gate of an SCR with a PWM signal , once lached you will loose controle from its gate. Unless the supply is pulsed in some way, to allow the SCRs to turn off... But the original question is far too vague - much more detail is needed! Oh that is universally known how to delatch an SCR. What OP says is done with AC lamps the 'phase control', never heard of doing this with DC . Watch out for Chinese Xmas lamps which works on AC and are beautifully controlled with SCRs and a COG . -Ap |
| Topic | Author | Date |
| PWM LED dimming | 01/01/70 00:00 | |
| Can you be more specific? | 01/01/70 00:00 | |
| PWM Dimming with SCR?? | 01/01/70 00:00 | |
| Maybe Unlikely, but... | 01/01/70 00:00 | |
| Oh that is universally known | 01/01/70 00:00 | |
| I did say, "Maybe Unlikely"... | 01/01/70 00:00 | |
| then it better be a high frequency | 01/01/70 00:00 | |
AC-driven LED ropes | 01/01/70 00:00 |