I have a 510 5v Boxmod from madvapes. Works great. Except when it is outside my house. If I turn the switch to on, it just starts going. Nowhere else outside, only outside my house. Its really wierd. Possiable causes?
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Well, I'm willing to bet it's not just outside your house. That just happens to be the only place outside that the LED has gotten a good dose of direct sunlight. I've seen one other post from someone with the same problem.
Here's what's going on. The atomizer in that box is controlled by a MOSFET. A MOSFET is a kind of switch. The push button can't handle the current needed so all it actually does it send voltage to the gate on the MOSFET which signals the MOSFET to power the atomizer. The LED is also powered from the gate circuit. It's not wired in with the atomizer. Now an LED is a strange animal in a way. It can backfeed when exposed to enough light. So, when you expose the LED to enough direct sunlight, it's enough to activate the gate circuit and cause your atomizer to fire.
You can put some tape or something over the LED and it'll stop. Assuming yours is wired like the picture on madvapes site, there is a more permanent solution.
See that resistor in the top right portion of the board? It's the little doodad that's going diagonally. That's the resistor on the positive leg of the LED. If you cut it off, your LED will quit working but, it won't activate your PV anymore. If you try this and it destroys your PV, all you'll get from me is an apology.
Here's what's going on. The atomizer in that box is controlled by a MOSFET. A MOSFET is a kind of switch. The push button can't handle the current needed so all it actually does it send voltage to the gate on the MOSFET which signals the MOSFET to power the atomizer. The LED is also powered from the gate circuit. It's not wired in with the atomizer. Now an LED is a strange animal in a way. It can backfeed when exposed to enough light. So, when you expose the LED to enough direct sunlight, it's enough to activate the gate circuit and cause your atomizer to fire.
You can put some tape or something over the LED and it'll stop. Assuming yours is wired like the picture on madvapes site, there is a more permanent solution.
See that resistor in the top right portion of the board? It's the little doodad that's going diagonally. That's the resistor on the positive leg of the LED. If you cut it off, your LED will quit working but, it won't activate your PV anymore. If you try this and it destroys your PV, all you'll get from me is an apology.
Mickey is right, an LED and a photo-diode (solar cell) are basically the same thing except the cathodes and anodes are of different proportions.
If you wish to keep the LED working.......
1) Add a diode between the gate and the LED
2) or wire the LED to the v-out rather than the gate pin.... with the proper resistor so it doesn't go "poof".
1) Add a diode between the gate and the LED
2) or wire the LED to the v-out rather than the gate pin.... with the proper resistor so it doesn't go "poof".
I'd say it's a lot less crazy than thinking my neighbor's activating it with a tesla coil.
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