testload/driver problem. my wiring could be wrong.

[Down with Umbrella]

This is my first attempt to use a test load to set the driver.
it is entirely possible I built this wrong hmm :thinking:
I decided to buy an X-boost V7 with an adjustable output. I built a test load with a schematic found here on LPF. I used a 3W 1ohm resister and 7 IN4005 diodes. to power the driver I taped one 18650 to wires(not pictured) and soldered them to the driver leaving one wire open to manually complete the circuit.
the problem
when I connect the circuit the driver gets really hot and my DMM reads extremely low values and does not change when I adj the pot.
I am using this driver for the new 520mn diode and shooting for 550-600ma
my host hasn't arrived yet.

This picture only shows where I am measuring. just trying to trouble shoot I hooked up to my DC power supply to look for a voltage drop. ughhh I feel like this is easy and im just doing something silly wrong.

let me know if you need more info. I have checked my soldering joints and everything is solid.
help

 

[jander6442]

That driver Vin is on top of the driver the your bottom soldering is for nothing that's where you mount it to a heatsink. See the V+ V- on the top that's where your weld your Vin.

 

[Down with Umbrella]

Ohhh I gotcha. Thats going to be a pain to put in a C6 host.

 

[Down with Umbrella]

Well, the driver is now dead. Rip.

 

[Tmack]

Aw man. Well at least you learned. I need to learn more about building test loads. I'm at the point where they will be more useful than when I first came here.

 

[KRNAZNBOY]

Well, the driver is now dead. Rip.

What happened? I hate it when things die....
-Matt

 

[Down with Umbrella]

When I try to adj the pot my DMM readings don't change. I rewired my connections to the driver as jander6442 discribed and nothing. To rule out the battery I hooked it up to my DC power supply. When I bypass the test load and hook my DMM to LD- and LD+ it reads the same as my power supply and the pot does nothing. The driver just gets VERY hot.

Edit. Let me know if you need to see more pictures

 

[KRNAZNBOY]

When I try to adj the pot my DMM readings don't change. I rewired my connections to the driver as jander6442 discribed and nothing. To rule out the battery I hooked it up to my DC power supply. When I bypass the test load and hook my DMM to LD- and LD+ it reads the same as my power supply and the pot does nothing. The driver just gets VERY hot.

Edit. Let me know if you need to see more pictures

If a driver is passing all/no current it is safe to assume it is dead. unless you set the driver to a higher current than the input current

Sorry to hear about that, I broke my driver first time I tries to set it myself.

You are not alone my friend

Don't throw it out. It may actually still work or maybe it is fixable

-Matt

 

[Cyparagon]

I used a 3W 1ohm resister

You might want to double-check to be certain