Will these components work together?

Thread Starter

Wonderd

Joined Nov 28, 2021
5
I would like to make a 4 pump top off system using float triggers and a main relay. Would the below components work together correctly?



Screenshot_20211128-001840_Amazon Shopping.jpgScreenshot_20211128-001759_Amazon Shopping.jpgScreenshot_20211128-001504_Amazon Shopping.jpgScreenshot_20211128-000710_Amazon Shopping.jpgScreenshot_20211128-000347_Amazon Shopping.jpg
 

Thread Starter

Wonderd

Joined Nov 28, 2021
5
Thanks for the reply. This is what I'm looking to do. Pumps get activated when water in smaller tanks get too low.

Schematic.png
 

bertus

Joined Apr 5, 2008
21,851
Hello,

The relays board and the schematics do not match.
The schematics suggest there is a P9 to connecct the 12 Volts, but I can not find it on the board:
HiLetgo 8 relays board schematic.jpg

HiLetgo 8 relays board front.jpg

Bertus
 

bertus

Joined Apr 5, 2008
21,851
Hello,

@LowQCab , The schematic does not show a voltage regulator from 12 Volts to 5 Volts.
There is a P9 mentioned in the schematic with separate 5 Volts and 12 Volts pins.

Bertus
 

LowQCab

Joined Nov 6, 2012
1,917
Where did the Schematics come from ?
None of this is surprising when ordering from China.
The Schematics don't show a Voltage Regulator,
and also don't show the Input-Polarity-Selection-Jumpers.

Who knows, I don't have a clue.
"China"
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Thread Starter

Wonderd

Joined Nov 28, 2021
5
Anyone else have an idea so I can lean one way or another? Here is another board I found which says high/low trigger

Screenshot_20211129-050102_Amazon Shopping.jpg
 

LowQCab

Joined Nov 6, 2012
1,917
Look at the Wiring-Picture I sent You earlier.
The Jumpers determine whether the Low-Voltage-Signal-Inputs need to all
connect to either, "Ground", or "Plus-12-Volts", in order to energize the Relay-Coil(s).

I'm guessing that they will be set-up to require a Switched-Ground by default.
The Jumpers "might be" marked "HI" or "LO" indicating a Ground, or 12-Volt, Input requirement.

A Switched-Ground arrangement is the preferred way to go.

This type of Board is pretty hard to damage if You hook it up wrong.
All You can do is take your best-guess as to what
the tiny symbols on the Circuit-Board probably mean, and then go for it.
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