Dimmer basic circuit pls help

[takbbb]

i am making a dimmer circuit

and i find a source on it in microchip

https://ww1.microchip.com/downloads/en/AppNotes/40171a.pdf

however the circuit have a R2 (1M ohm) in series with the power line

i wonder then how many current can be drive ???

as i connected the same circuit(with other atmel MCU) , the 1M have limited the current .....

so how does it work ??( i assume the Vcc = 5V in the circuit)
sorry the pic is uprighted..

and i search on the web which other circuit also have such 1M resistor

 

[stabby21]

The application notes tells you that the maximum load will be 100W.

R2 acts as a drop for the zener to regulate at 5V. The Vcc is connected to the Vdd of the chip. Thus having a supply of 5V.

The load is connected to the Hot in and Hot out of JP2. Return of JP2 is actually the ground level of the circuit.

JP1 is only for the connector of the bright and dim switch.

 

[ilodigwe l chinweze]

pls can you help me with any of this: schematic circuit diagram of 12v-220v inverter of 1kw,2kw & 5kw