I rewired the switch per the guide.
The red LED for off works
The switch LED does not work in either position
I measure less than 1VDC from either channel of PSU
I need to test the soft start board next.
That switch is double-pole, you need to make your switch connections to the same pole on thw switch - at the moment you have one side of the switch connected to 'NO' on one pole and the other side to 'C' on the other pole. As currently configured you have no switch in circuit hence no LED working and you won't be hearing the relay click either.
...but isn't it a bit contradictive with the purpose of the circuit? It means having to switch 2 switches instead of just 1.
On this Thanksgiving eve I am giving thanks to you for nudging me over the finish line.
All systems go.
I made one more change to the guide to get the button LED to work.
@richb, very nice job!
Will you be posting gerbers once completed?
richb, I'm pleased to see this development.
I am building a preamp in a modular fashion (volume, input selector, display, controller, etc as modules) using an Atmega328 as the controller; this MCU is handling encoders, display, and IR remote control etc.. My code is similarly modular so that it is straightforward to change, for example, just the volume board from relay based to PGA based if desired. There are quite a few examples of MCU based preamps on this forum (PIC, Atmega, ESP).
A useful module would be to be able to switch the preamp into 'standby' and for the preamp to turn on/off the power amp. For those who already have an MCU with a couple of spare pins and suitable power supplies, as is the case case for me, only a subset of what you have developed is needed.
Would I be right in assuming that all I will need is the top left-hand part of your schematic (plus the mains input) and first to raise ICL then RLY after a short delay - with shut down being in the reverse order? This corresponds to the top right quadrant of your board (everything with suffix 'a').
Mark did a fantastic job of this project and I see this as an interesting development from his work. Yes, there is a question over software support - and the fact that Mark deliberately built the logic into hardware to avoid this is not lost on me. But, then again, this is DIY and people putting ideas out there, I feel, is to be encouraged. I'd be pleased to hear how you get on.
Lovely work, @richb, congratulations! It's a fine looking board and the slanty wavy heatsinks are a nice touch.
If you are in the mood for the
never-ending hellish nightmareexciting and fulfilling experience called "customer support", you could start a new thread which discusses the unique characteristics of your board, and which includes Gerber files so that others may send it to PCB fab. I suggest you emphasize the remote control feature heavily, very few others offer that possibility.