Hello,
I am trying to build a circuit to dim 6 LED light bulbs individually, (in as small a space as possible to fit in the fixture) without using Galvanic isolation.
The problem is I cant see how to trigger a logic level triac from a MCU pin, when a Full bridge rectifier circuit is used for a power supply.
Triac driver, Figure 3a
I'm trying to use a power supply similar to the one found here (note c3 should be connected to negative rail)
Any advice would be greatly appreciated (all tests are done with an isolation transformer)
I am trying to build a circuit to dim 6 LED light bulbs individually, (in as small a space as possible to fit in the fixture) without using Galvanic isolation.
The problem is I cant see how to trigger a logic level triac from a MCU pin, when a Full bridge rectifier circuit is used for a power supply.
Triac driver, Figure 3a
I'm trying to use a power supply similar to the one found here (note c3 should be connected to negative rail)
Any advice would be greatly appreciated (all tests are done with an isolation transformer)