Re: relay board

On Wed, 26 Mar 2025 17:13:57 +0100, Lasse Langwadt <llc@fonz.dk>
wrote:

On 3/24/25 16:05, bitrex wrote:

On 3/24/2025 10:33 AM, john larkin wrote:

>
Here's another PCB:
>
https://www.dropbox.com/scl/fi/yxqdj418jx1ttuusqqehg/P946_Relays_A11.jpg?rlkey=hxshyt4mze59k31xpnsi3bfzc&raw=1
>
I figured we could have a relay board in our modular power system, and
my PCB layout guy had time, so I did one.
>
Then I figured that instead of fuses to protect the contacts and PCB
traces, I could use Hall sensors and drop out a relay if the current
exceeds 8 amps. Then I figured I may as well report the currents to
users. And why not voltage too? Then  it became a programmable circuit
breaker module. With average and RMS voltage and current and power
measurement and waveforms.  And programmable ganging. And plugin fuses
for bussing. Somebody stop me.
>

 
Better is the enemy of the good

>
>
more like enemy of "good enough" aka. done

Done is an important engineering virue.

If a bit of hardware could be applied with some code, it may well be
worth putting on a board. Some customer might want a feature and it
could be added quickly.

Lots of people make electronic programmable circuit breakers, but
generally don't include measurements or waveform acquisition. So why
not? I have embarassing amounts of whitespace on this PCB.