After doing some research, the enclosed circuit designs are what I came up with. I am redesigning the circuit diagrams using Eagle and plan to open up these up to the Open Source community so I would welcome any feedback from much more knowledgeable people if this is a sufficient design or if there is something better that I should consider.
GOALS
· Use common, easily available parts (besides circuit board).
· Use separate 24VDC regulated 240W (10A) power supply to drive each “LED Grow Bar”.
· Each “LED Grow Bar” consists of a total of (80) 3W 700mA LEDs (240W max).
· Each “LED Grow Bar” consists of (7) PWM channels to control (7) different types of LEDs.
· A NodeMCU-ESP8266-12E microcontroller along with ULN2003A ICs will be used to control the PWM.
· PWM output to be 3.3VDC using standard RJ45 connectors. These can be linked together as many as needed (what would be the max number?).
· Power Supply Plug would be a 10A standard C13/C14 computer power cord rewired to have 24VDC; 3.3VDC and GROUND.
· Plugs to LEDs would be common 10pin PC board Header connection plugs.
I included three circuit layouts. The PWM generator; the LED drivers; the LED layout.
Thank you for your time and feedback!
GOALS
· Use common, easily available parts (besides circuit board).
· Use separate 24VDC regulated 240W (10A) power supply to drive each “LED Grow Bar”.
· Each “LED Grow Bar” consists of a total of (80) 3W 700mA LEDs (240W max).
· Each “LED Grow Bar” consists of (7) PWM channels to control (7) different types of LEDs.
· A NodeMCU-ESP8266-12E microcontroller along with ULN2003A ICs will be used to control the PWM.
· PWM output to be 3.3VDC using standard RJ45 connectors. These can be linked together as many as needed (what would be the max number?).
· Power Supply Plug would be a 10A standard C13/C14 computer power cord rewired to have 24VDC; 3.3VDC and GROUND.
· Plugs to LEDs would be common 10pin PC board Header connection plugs.
I included three circuit layouts. The PWM generator; the LED drivers; the LED layout.
Thank you for your time and feedback!