Hi All,
I am building a Wireless Low Voltage Dimmer for a theatre project.
Essentially, we have a DMX (RS485) signal going into an Xbee Pro transmitter, and getting sent to another receiver.
On the Receiving end I have another Xbee Pro Module on a Parallax Propeller Board to receive and split out DMX. The DMX then goes to an Opto Isolater, and to an output XLR connector and the to the dimming processor. The Opto Isolator Chip has its own isolated power from the prop to a power isolator then to the OptoIso. I have designed this so the Prop gets its 3.3v/5v from its own power supply or 9v Batteries, and the Dimmed Load gets power from a 12v source like a Gel Cell Battery.
Inside the receiver I am also trying to put together a 4 circuit low voltage high wattage dimmer system with PWM.
So the Prop is controlling 4 150W FETs (Digi Key P/N: 497-7535-5-ND) I am assuming that the 2.5v Vgs is the PWM signal from the processor?
What else do I need for this circuit? Someone else that I consulted mentioned a series resistor on the gate to control it opening.
Prop->(Control) to FET
Feed V -> 30A Fuse -> FET
FET->Terminal Blocks->Load
I am building a Wireless Low Voltage Dimmer for a theatre project.
Essentially, we have a DMX (RS485) signal going into an Xbee Pro transmitter, and getting sent to another receiver.
On the Receiving end I have another Xbee Pro Module on a Parallax Propeller Board to receive and split out DMX. The DMX then goes to an Opto Isolater, and to an output XLR connector and the to the dimming processor. The Opto Isolator Chip has its own isolated power from the prop to a power isolator then to the OptoIso. I have designed this so the Prop gets its 3.3v/5v from its own power supply or 9v Batteries, and the Dimmed Load gets power from a 12v source like a Gel Cell Battery.
Inside the receiver I am also trying to put together a 4 circuit low voltage high wattage dimmer system with PWM.
So the Prop is controlling 4 150W FETs (Digi Key P/N: 497-7535-5-ND) I am assuming that the 2.5v Vgs is the PWM signal from the processor?
What else do I need for this circuit? Someone else that I consulted mentioned a series resistor on the gate to control it opening.
Prop->(Control) to FET
Feed V -> 30A Fuse -> FET
FET->Terminal Blocks->Load