Wiring
The atomizer is connected to the OUT pad. If the DNA 75 is not being grounded through the
mounting screws, the GND pad should connect to the negative side of the connector. The battery is
connected to the B+ and B- terminals. It is important to use appropriately sized wire when using the
DNA. Too small wire will not perform well, and significantly undersized wire can burn out. The output
wires should be silicone or Teflon insulated only, and at least 14 gauge. The input wire carries less
current, and can be as small as 20 gauge wire if silicone or Teflon insulated.
Recommended wire sizes
Minimum size
Recommended size
Maximum size
Battery, silicone insulated
20 gauge
18 gauge
16 gauge
Battery, PVC Insulated
18 gauge
16 gauge
14 gauge
Output, silicone insulated
16 gauge
14 gauge
12 gauge
Switches, if used
28 gauge
24 gauge
22 gauge
Reverse Polarity Protection
The DNA 75 includes built in Reverse Polarity Protection to protect the user, board, device, and
battery in the event that a battery is inserted backwards.
External component recommendations
The DNA 75 is a self-contained power regulator which does not require external components for
its user interface. However, it does support the use of external interface components if desired.
Fire button:
Use a momentary on, normally open type switch or button. A standard pushbutton switch is
appropriate. The switch is a logic function – all power switching is handled with transistors inside the
DNA module, so the switch does not need to be rated for power. A waterproof or processed sealed
switch is recommended. Please use caution, as the positive side of the fire button connects directly to
positive battery voltage.
Up/Down buttons:
The small onboard buttons labeled UP and DOWN allow the user to increase or decrease the
power level in .1 Watt increments. Alternatively, remote normally open type switches or buttons can be
attached to the UP and DOWN mounting holes for customization.
Battery:
The DNA 75 runs from a single lithium polymer type battery pack or round lithium ion 18650
type battery. The DNA 75 can use multiple cells in a parallel type wiring configuration as long as the
maximum input voltage is 4.2v.
