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DNA 12 Evolv w/ an MCU

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Breaktru:
Para from ECF gave my name to Brandon from Evolv to try out their new DNA module in a mod. Thanks very much Para.

These are preliminary tests of the new Evolv DNA 12 module.
Testing right now with (2) paralleled 18650 Trustfires but will later use (2) Li-Po 20c batteries.
The Trustfires are under rated for the DNA as you can see by the Battery Level readings. Voltage drops from 4.17v to 3.27v Definitely need higher "C" rating batteries as per  DNA spec sheet.

Battery update: Using my Li-Po's on it and it only dropped Four Hundreds of a volt (0.04v) on battery input.

I have found that the Voltage, Amperage and Wattage readings fluctuate considerably while holding down the fire button.
I have coded to calculate V, A and Watts every 1000ms (1second).
With two 20c Li-Pos in parallel, the highest wattage achieved is 10.68 watts. Starts at 9.68 watts and fluctuates to values in between to max of 10.68.
With one 20c I get slightly lower max of 10.02 watts.

Update on wattage: On occasion I get over 11 watts. I've gotten 11.58watts but I can not achieve it every time. It is NOT consistent.

As per datasheet 3.3 ohms should get you 12 watts but I tried a 3.3 ohm atty and only get 9.7 watts.
I also notice that it was a pulsed output. I can hear the atty pulsing on and off.

This is weird: Wanted to see if I see a red err LED on the DNA so I tried the 3.3 ohm atty again and got NO pulsing and get 10.38 watts. Still fluctuating readings. NO red LED indicating.
Fluctuation is pretty wide in range and can vary from a tenth of a watt to as much as over a watt.

I understand that VW maintains wattage with the load. Resistance of atty may vary and the DNA adjusts accordingly to maintain the set wattage. But........ Wattage readings should NOT fluctuate.
Also most of my testing is with a fixed load. A Ceramic 20 watt resistor. No resistance variation should occur.

Right now my highest wattage is 10.68w. Mamu and BigFran was able to get 11w by shorting up on the battery wires.
Sometimes that is not practical when using a particular enclosure due to the placement of batteries. My batteries are soldered so batt contacts is not an issue. I am using 20ga wires on power connections.

I'm not concerned with getting more wattage. I like tasting my juice and not sizzle it. With the juice I'm using, anything over 7watts is harsh and tastes burnt.

theDom:
Holy crap batman. That is amazing for a novice like me.
Well done breaktru  :rockin smiley:

Aromaz:
Fantastic work breaktru, well done  :beer-toast:

Pantera:
Well done my man!

It makes NO sense to put that DNA unit in a mod without a display, or am I missing something.
What you did with the display, IMHO is what the DNA was intended to be used with. Some sort of display. What would be the point of guessing the wattage output?
 :thumbsup:

Breaktru:
See updates to original post............

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