stealthvape
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- Aug 1, 2012
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I hope some of you guys are going to buy these things as I'm about to fork out for 100 of them.
Evolv DNA 20D20 Watt variable power module with OLED display
The DNA 20D is a power regulated digital switch-mode DC-DC converter for personal vaporizers. It
features a small OLED display, analog or digital user controls, onboard buttons and synchronous
rectification for maximum battery life and minimal heat generation.
Display
The DNA 20D has a small .69” diagonal blue OLED screen. The screen is attached to the main
board by a flexible cable, allowing freedom in the design of your device. Please use caution when
handling the screen and design the device so that the cable will be secured or strain relieved in
operation. The normal and special operating modes shown on the display are discussed below.
Normal Operation
Watt setting: The power level currently set on the DNA 20D.
Battery indicator: The current state of charge of the battery.
Volts display: The current or most recent output voltage being supplied to the atomizer.
Ohms display: The resistance of the atomizer attached to the device. This is measured only when the
unit is supplying power to the atomizer. At other times, it shows the most recent measurement.
Other modes
Locked mode: Pressing the fire button five times with less than .7 seconds between presses will cause
the device to enter Locked mode. In Locked mode, the device will not fire and the output power will not
adjust accidentally. While in Locked mode, the screen will be off, except that pressing a button will show
“Locked, Click 5X”. To exit Locked mode, press the fire button 5 times.
Stealth mode: While locked, pressing the fire and down buttons simultaneously for five seconds will
switch to stealth mode. In this mode the display is off. It will still show error messages and the “Locked,
Click 5X” advisory. To switch back to normal display mode, from locked mode hold down the fire and
down buttons simultaneously for 5 seconds. This setting is stored to internal flash memory, and remains
if power is removed.
Right Mode and Left Mode: While locked, holding the fire and up buttons simultaneously for 5 seconds
flips the display. This allows for maximum flexibility in designing the mod, as well as accommodating left
handed vapers. This setting is stored to internal flash memory, and remains if power is removed. Please
note that if using a potentiometer instead of a button, this option is not available. However, it can be set
before soldering the potentiometer on during manufacture.
Error Messages
The DNA 20 will indicate a variety of error states.
Check Atomizer: The DNA does not detect an atomizer, or the atomizer has shorted out.
Shorted: The atomizer or wiring are short circuited.
Check Battery: The battery is below 3.1 volts. It probably needs to be charged.
Weak Battery: The battery sags excessively when firing. This typically means the user is not using a high
rate battery, or the battery is old and degraded. It can also mean the battery is not making good contact.
Too Hot: The DNA 20D has onboard temperature sensing. It will shut down and display this message if
the internal board temperature becomes excessive.
Too low power setting: The DNA 20D puts out a minimum of 4 volts. With low power settings (7 to 8
watts) and low resistance atomizers (below 2 ohms) the DNA will sometimes be unable to provide a low
enough power output to be power regulating. If this is the case, the Ohms display will be flashing. The
device will still operate.
Auto power down: The screen will be at full brightness while firing. After 15 seconds with no button presses, the screen will dim. 4 minutes after the last button press, the screen will fade out and the device will go to sleep mode.
Pressing any button will turn the device and display back on.
Pinout
The DNA 20D has onboard switches for adjusting the power level and activating the output.
Each of these functions also has optional through-hole pads for using remote buttons. The power level
can also be set with a potentiometer. The DNA will automatically detect whether the power level is
being set with a potentiometer or buttons at startup. There is also an input port for a charger.
Mechanical Dimensions
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 mounting holes for the DNA 20D are .100” pitch and .040” diameter. It can be wired in
directly using soldered connections, or socketed with standard .1” hardware.
External component recommendations
The DNA 20D 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.
Switch:
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.
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. The onboard tactile switches are waterproof and rated for 300,000
actuations. However, they are designed to always be used with external actuators, not pressed directly
with the fingers. Please make sure the actuator presses down on the button only, and does not rotate or
drag the top surface. Alternatively, remote normally open type switches or buttons can be attached to
the UP and DOWN mounting holes for customization.
Potentiometer:
As an alternative to the digital interface, an analog potentiometer can be used to dial in the
power setting. If connected to the UP/POT pads, the DNA 20D will automatically detect analog mode
and use the potentiometer instead of the buttons. Resistances between 1k and 10k ohms are
recommended. To reverse the direction of turn for adjustment, reverse the Potentiometer – and
Potentiometer + connections. Any type of potentiometer can be made to work – shaft, shaftless, slide,
etc.
Battery:
A single cell rechargeable lithium chemistry battery is recommended. Either a lithium ion or a
lithium polymer type can be used. Any battery used should be rated for a MINIMUM of 7 amps
continuous discharge current. High C rated lithium polymer or IMR cylindrical cells are strongly
preferred.
Charger:
Evolv offers an accessory DNA Charger which is USB powered and provides a 500 milliamp
charge current. The use of an onboard charger is optional – a removable battery will also work.
Evolv DNA 20D20 Watt variable power module with OLED display
The DNA 20D is a power regulated digital switch-mode DC-DC converter for personal vaporizers. It
features a small OLED display, analog or digital user controls, onboard buttons and synchronous
rectification for maximum battery life and minimal heat generation.
| Minimum | Typical | Max | |
| Output Power | 7 Watts | 20 Watts | |
| Output Voltage | 4 Volts | 8.3 Volts | |
| Output Current | 6 Amps | ||
| Atomizer Resistance | 1.0 Ohms | 2.5 Ohms | 3.3 Ohms |
| Input Voltage | 3.2 Volts | 3.7 Volts | 4.3 Volts |
| Input Current | 1.5 Amps | 4.0 Amps | 7 Amps |
| Screen On Current | 25mA | ||
| Quiescent Current | 1 mA | ||
| Power Down Current | 22 uA | ||
| Efficiency | 93% | ||
| Weight | 6g | ||
| Footprint | .65” x 1.30” | ||
| Thickness | .35” | ||
| Screen size | .69” OLED |
Display
The DNA 20D has a small .69” diagonal blue OLED screen. The screen is attached to the main
board by a flexible cable, allowing freedom in the design of your device. Please use caution when
handling the screen and design the device so that the cable will be secured or strain relieved in
operation. The normal and special operating modes shown on the display are discussed below.
Normal Operation
Watt setting: The power level currently set on the DNA 20D.
Battery indicator: The current state of charge of the battery.
Volts display: The current or most recent output voltage being supplied to the atomizer.
Ohms display: The resistance of the atomizer attached to the device. This is measured only when the
unit is supplying power to the atomizer. At other times, it shows the most recent measurement.
Other modes
Locked mode: Pressing the fire button five times with less than .7 seconds between presses will cause
the device to enter Locked mode. In Locked mode, the device will not fire and the output power will not
adjust accidentally. While in Locked mode, the screen will be off, except that pressing a button will show
“Locked, Click 5X”. To exit Locked mode, press the fire button 5 times.
Stealth mode: While locked, pressing the fire and down buttons simultaneously for five seconds will
switch to stealth mode. In this mode the display is off. It will still show error messages and the “Locked,
Click 5X” advisory. To switch back to normal display mode, from locked mode hold down the fire and
down buttons simultaneously for 5 seconds. This setting is stored to internal flash memory, and remains
if power is removed.
Right Mode and Left Mode: While locked, holding the fire and up buttons simultaneously for 5 seconds
flips the display. This allows for maximum flexibility in designing the mod, as well as accommodating left
handed vapers. This setting is stored to internal flash memory, and remains if power is removed. Please
note that if using a potentiometer instead of a button, this option is not available. However, it can be set
before soldering the potentiometer on during manufacture.
Error Messages
The DNA 20 will indicate a variety of error states.
Check Atomizer: The DNA does not detect an atomizer, or the atomizer has shorted out.
Shorted: The atomizer or wiring are short circuited.
Check Battery: The battery is below 3.1 volts. It probably needs to be charged.
Weak Battery: The battery sags excessively when firing. This typically means the user is not using a high
rate battery, or the battery is old and degraded. It can also mean the battery is not making good contact.
Too Hot: The DNA 20D has onboard temperature sensing. It will shut down and display this message if
the internal board temperature becomes excessive.
Too low power setting: The DNA 20D puts out a minimum of 4 volts. With low power settings (7 to 8
watts) and low resistance atomizers (below 2 ohms) the DNA will sometimes be unable to provide a low
enough power output to be power regulating. If this is the case, the Ohms display will be flashing. The
device will still operate.
Auto power down: The screen will be at full brightness while firing. After 15 seconds with no button presses, the screen will dim. 4 minutes after the last button press, the screen will fade out and the device will go to sleep mode.
Pressing any button will turn the device and display back on.
Pinout
The DNA 20D has onboard switches for adjusting the power level and activating the output.
Each of these functions also has optional through-hole pads for using remote buttons. The power level
can also be set with a potentiometer. The DNA will automatically detect whether the power level is
being set with a potentiometer or buttons at startup. There is also an input port for a charger.
| Pin Number | Pin Name | Function |
| 1 | Output - | Negative side of the power output. Connect to atomizer |
| 2 | Down - | Negative side of the power down switch |
| 3 | Down + | Positive side of the power down switch |
| 4 | Charger - | Negative side of the charger board connection |
| 5 | Charger + | Positive side of the charger board connection |
| 6 | Battery - | Negative side of the battery input |
| 7 | Battery + | Positive side of the battery input |
| 8 | Up - / Pot - | Digital mode: Negative side of the up switch Analog mode: Potentiometer negative terminal |
| 9 | Up + / Pot Wiper | Digital mode: Positive side of the up switch Analog mode: Potentiometer center terminal |
| 10 | NC / Pot + | Digital mode: Do not connect Analog mode: Potentiometer positive terminal |
| 11 | Fire + | Positive side of the fire switch |
| 12 | Fire - | Negative side of the fire switch |
| 13 | Output + | Positive side of the power output. Connect to atomizer. |
| 14 | DOWN | Onboard down button |
| 15 | UP | Onboard up button |
| 16 | FIRE | Onboard fire button |
Mechanical Dimensions
| Recommended wire sizes | |||
| Minimum size | Recommended size | Maximum size | |
| Battery | 22 gauge | 20 gauge | 20 gauge |
| Output | 24 gauge | 20 gauge | 20 gauge |
| Charger, if used | 26 gauge | 24 gauge | 20 gauge |
| Potentiometer, if used | 28 gauge | 24 gauge | 20 gauge |
| Switches, if used | 28 gauge | 24 gauge | 20 gauge |
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 mounting holes for the DNA 20D are .100” pitch and .040” diameter. It can be wired in
directly using soldered connections, or socketed with standard .1” hardware.
External component recommendations
The DNA 20D 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.
Switch:
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.
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. The onboard tactile switches are waterproof and rated for 300,000
actuations. However, they are designed to always be used with external actuators, not pressed directly
with the fingers. Please make sure the actuator presses down on the button only, and does not rotate or
drag the top surface. Alternatively, remote normally open type switches or buttons can be attached to
the UP and DOWN mounting holes for customization.
Potentiometer:
As an alternative to the digital interface, an analog potentiometer can be used to dial in the
power setting. If connected to the UP/POT pads, the DNA 20D will automatically detect analog mode
and use the potentiometer instead of the buttons. Resistances between 1k and 10k ohms are
recommended. To reverse the direction of turn for adjustment, reverse the Potentiometer – and
Potentiometer + connections. Any type of potentiometer can be made to work – shaft, shaftless, slide,
etc.
Battery:
A single cell rechargeable lithium chemistry battery is recommended. Either a lithium ion or a
lithium polymer type can be used. Any battery used should be rated for a MINIMUM of 7 amps
continuous discharge current. High C rated lithium polymer or IMR cylindrical cells are strongly
preferred.
Charger:
Evolv offers an accessory DNA Charger which is USB powered and provides a 500 milliamp
charge current. The use of an onboard charger is optional – a removable battery will also work.
