32 replies to this topic

[Slot-Racer]

Phil, that one in your pic is more of a panel meter. Where you going to fit that? It's BIG! Get the one that I listed as it's tiny and is rated to 30v and I have yet to blow it out. 

[Phil Beukema]

Hey Mario,

 

It was mounted right on top of the heat sink area (thread #21). It was a little big and rated to 30v also. Could you provide a link to the one you like?

 

In the 20 seconds it worked, it showed the volts correctly but as I squeezed the trigger, the volts went down to zero. Is this right?

 

Thanks

[Slot-Racer]

So I ran the controller again and decided the 10mm fans are too tiny of CFM. I upgraded to 20mm which is WAY better. They are still 40mmx40mm but taller which pushes more air at the same voltage. The other were 6,000 RPM while these are 9,000. 

 

 

 

Fans source: https://www.amazon.c...0?ie=UTF8&psc=1

 

Also need to add a 5W 15R resistor to keep the voltage at 12v when the track voltage is 13.5 +/- ~  or more volts.

 

Resistor source: https://www.amazon.c...5w 15r resistor

[Slot-Racer]

Hi Phil,

 

Yes that is too big! Right off post #1.

 

Volt Meter

 

$4.00 Volt meter: https://www.amazon.c...e?ie=UTF8&psc=1

 

If you are testing and connecting with only white and black yes when you pull the trigger it will go lower in voltage as it's going through the resistor network and it's wired right. When you connect to the track it will stay on if wired like I advised, as when you connect the red (brake) it will stay on always........well only when the other factors I mentioned do not occur, then that is your indication something is open or now power etc.

 

Hope that helps.

[Phil Beukema]

Thanks Mario, I finally got the correct meter. It's much better!

 

 

[Slot-Racer]

Thanks Mario, I finally got the correct meter. It's much better!

 

 

0919181716_HDR_resized.jpg

 

That is SOOO much better! Awesome! 

[Dave_12]

when the controller applies the brake circuit  the voltage is reversed what effect does this have on the voltmeter? 

[LiqTenExp]

when the controller applies the brake circuit  the voltage is reversed what effect does this have on the voltmeter? 

 

Brake is not reverse voltage is is a very low resistance/near short across the motor.

 

If you have the voltmeter across the track voltage input of the controller it will have no impact. These can be simple 2 wire voltmeters or 3 wire (2 wires tied to white lead, ground tied to red lead). If you have the voltage across the controller output it is recommended you have a 3 wire voltmeter that stays powered when the output goes to 0V so it stays lit. One lead goes to track voltage (white lead), the other lead goes to controller output (black lead), and the other goes to ground (red lead)