| ??? 01/13/10 07:25 Read: times |
#172412 - probably Responding to: ???'s previous message |
If triac's A1 pin is connected to VCC pin of microcontroller You can turn-on triac with sinking to VSS . In idle state microcontroller output must be in high state. Very important is load type - on incandescent lamp short gate pulse is enough on any phase angle , on saving lamp - things are different.
There are application notes from Microchip, Texas (and Silabs or Cygnal, cant remember) - they are discussing dimmer circuit to be mounted instead wall switch. In this case problem is powering of microcontroller circuit - micro must be in really low power mode. If You have independent supply - then 892051 will be ok. |
| Topic | Author | Date |
| driving a triac with a ATMEL MCU | 01/01/70 00:00 | |
| pull-up or other chip? | 01/01/70 00:00 | |
| probably | 01/01/70 00:00 | |
| five volts controlling a hundred | 01/01/70 00:00 | |
| so i answered | 01/01/70 00:00 | |
| Throwing out the baby? | 01/01/70 00:00 | |
| previous | 01/01/70 00:00 | |
| they need freelancers? | 01/01/70 00:00 | |
| I see | 01/01/70 00:00 | |
| Yep | 01/01/70 00:00 | |
| don't forget about "triac drivers" | 01/01/70 00:00 | |
| my prefered way | 01/01/70 00:00 | |
| Do always use a buffer! | 01/01/70 00:00 | |
| there is an old Philips appnote which ... | 01/01/70 00:00 | |
| incredible | 01/01/70 00:00 | |
Thanks! | 01/01/70 00:00 |