speedfreek67
Achiever
- Joined
- Jan 15, 2017
- Messages
- 4,428
Safety:
Use ohms law to find the MINIMUM resistance, and *never* go below that.
For a given resistance of coil a dual coil RDA will have half the final resistance of a single coil. So take your target resistance and build two coils with double that resistance.
Use 4.2 volts as your input for safety (with a fully charged battery the amp draw will be at its highest).
Leave a margin (for safety and for errors in your resistance measurement) i.e. if your battery CDR is 35 amps keep the amp draw below 30 amps for example.
Scrupulously check your battery wraps. The tiniest little tear can cause a short circuit which could overload your battery and cause it to vent or explode.
Make sure your build is safe by checking the built RDA on an ohms reader or regulated mod. If there is a short circuit (possibly caused by an off cut of wire lying in the base of the RDA or your coil touching the top cap when you put it on, for instance, i.e. something touching somewhere it shouldn't), on an ohms reader or reg mod it will say "atomiser short" or similar and won't fire, but on a mech it will try to fire and short circuit the battery, causing damage to the battery and possible explosion.
Keep all threaded parts of your mech (and the threads on the 510 pin of your RDA) clean.
Periodically check for damage to insulators.
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Comfort & Learning:
The lower the amp draw (the higher the resistance), the less stress you put on the battery and the longer the run time between battery changes. You can get a good vape at 0.5 ohms, for instance, using the right wire.
Different RDAs will produce a hotter or cooler vape using the same coils, as the space within the deck and the airflow are also factors.
Start off using simple wire, as it is easier to calculate. Nichrome flatwire is good in mechs. 24 gauge NI80 (nichrome) 3mm inner diameter, 6 wraps, dual coil, comes out at around 0.23 ohms.
Use http://www.steam-engine.org/ohm.html to calculate your safe build for your battery using 4.2 volts.
Use http://www.steam-engine.org/coil.html to see how different materials, coil diameter, number of wraps etc affect the heat output of the final build, at a given voltage (use 3.9 - 3.7 volts for this!).
Ask as many questions as you like.
Good luck!
Use ohms law to find the MINIMUM resistance, and *never* go below that.
For a given resistance of coil a dual coil RDA will have half the final resistance of a single coil. So take your target resistance and build two coils with double that resistance.
Use 4.2 volts as your input for safety (with a fully charged battery the amp draw will be at its highest).
Leave a margin (for safety and for errors in your resistance measurement) i.e. if your battery CDR is 35 amps keep the amp draw below 30 amps for example.
Scrupulously check your battery wraps. The tiniest little tear can cause a short circuit which could overload your battery and cause it to vent or explode.
Make sure your build is safe by checking the built RDA on an ohms reader or regulated mod. If there is a short circuit (possibly caused by an off cut of wire lying in the base of the RDA or your coil touching the top cap when you put it on, for instance, i.e. something touching somewhere it shouldn't), on an ohms reader or reg mod it will say "atomiser short" or similar and won't fire, but on a mech it will try to fire and short circuit the battery, causing damage to the battery and possible explosion.
Keep all threaded parts of your mech (and the threads on the 510 pin of your RDA) clean.
Periodically check for damage to insulators.
-_-_-_-_-_-_-_-_-_-_-_-_-_-
Comfort & Learning:
The lower the amp draw (the higher the resistance), the less stress you put on the battery and the longer the run time between battery changes. You can get a good vape at 0.5 ohms, for instance, using the right wire.
Different RDAs will produce a hotter or cooler vape using the same coils, as the space within the deck and the airflow are also factors.
Start off using simple wire, as it is easier to calculate. Nichrome flatwire is good in mechs. 24 gauge NI80 (nichrome) 3mm inner diameter, 6 wraps, dual coil, comes out at around 0.23 ohms.
Use http://www.steam-engine.org/ohm.html to calculate your safe build for your battery using 4.2 volts.
Use http://www.steam-engine.org/coil.html to see how different materials, coil diameter, number of wraps etc affect the heat output of the final build, at a given voltage (use 3.9 - 3.7 volts for this!).
Ask as many questions as you like.
Good luck!
