Hi,
I'm a bit of a newbie thats wants to build something.
I would need somebody to choose the parts, design the board and possibly write the code.
I understand most of what I want to do and I could cobble together lots of breakout boards from aliexpress, code from google and I'm pretty sure it would work (its a PID loop) but I want a professional PCB designed.
Below are my thoughts:
Circular PCB mainboard 20cm diameter with a 50mm hole in the centre (The 48mm [~2mm kerf] centre hole PCB used for the remote rotary encoder and 12 x RGB LED PCB)
Should be designed with serviceability and community open-source manufacture in mind
Extended temperature range
Heat dissipation should be factored in
Power:
Board input is 48V DC, output rails:
48V 10A (heater)
12V 3A (fans and MOSFET drive)
5V or 3.3V 1A (MCU's)
Mainboard has two MCU's
Primary MCU connections:
- Heartbeat output
- Onboard FTDI USB-Serial
- 3 x temperature inputs for thermistor or thermocouple
- 3 x fan outputs, each 12v 1A with speed control and reverse polarity function, onboard motor drivers
- 1 x heater output, onboard power MOSFET, 48v 10A, needs to be spec'd to run for 15 minutes constant
- Remote Rotary encoder and 12 x RGB LED PCB I/O
Secondary MCU connections
- Heartbeat input
- Remote relay board connector 5v logic
The primary MCU's main function is to run a PID loop
The secondary MCU's main function is to power off the system if the primary MCU stops responding (watchdog), maybe it also connected to an onboard thermistor and maybe its operating temperature range is higher than the primary MCU
Being a newbie I have no idea what something like this would cost to design.
Thanks for looking.
Richard