Re: relay board

On Mon, 24 Mar 2025 12:09:53 -0400, bitrex <user@example.net> wrote:

On 3/24/2025 11:26 AM, john larkin wrote:

On Mon, 24 Mar 2025 11:05:32 -0400, bitrex <user@example.net> 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

 
Selling more is better than selling less.
 

>
With respect to hardware UIs my heuristic is that number of users who'll
use a given feature declines exponentially with the depth of the menu
dive they must go on to get to said feature

We don't want complexity to drive away users, which suggests limiting
or at least simplifying features.

I think we'll make power metering an extra-cost option, partly for
that reason.

If people just want relays, I don't think the circuit breaker function
will scare them off. They don't have to use it, and everybody already
is used to circuit breakers.