hmm, I haven't checked into this thread for a while...
Let's catch up... but I think I'll leave out any commentary on the use of ye olde bud dryer as a grow box.
hey al
idk much about electronics but you said its posible to wire a dimmer switch to a power strip, if you can do that couldnt you plug a comercial dehydrator into the strip and just lower the temp with dimmer and use a thermometer to get it to 29c???
No, because the commercial dehydrator will have a fan motor in it, which is incompatible with the incandescent dimmer used for the heating element. If the fan motor is run on a light dimmer, it will spin at full speed when the dimmer is set to full voltage and will stall when the dimmer is dialed down, even a little. Dimmers are not designed to handle inductive loads found in motors, only purely resistive loads as found in an incandescent lamp filament or a plain ol resistor.
If you want to use a commercially made unit, you will have to open it up and put the dimmer in series with the dehydrator's heating element. Putting the dimmer in the feed to the entire unit will wreck the motor, if it spins at all.
Hey Al I'm not very good with electronics at all do you think you could walk me through this dryer with terms that are a little bit dumbed down please? Thanks!
How much dumber do you need it? There's a schematic circuit representation on page 1 of the thread; this is the clearest and simplest way I know of to communicate a wiring diagram. Just follow the black lines- those are wires!
If you're in doubt of how to wire this up, seriously, don't try it. There's mains AC voltage present in this ckt and it can be very dangerous if wired wrong or if your fingers touch the wrong stuff when it is live. This was drafted for folks who have the basic electrical understanding necessary to install a light dimmer without killing themselves!
so was there a page on how u built in the switch, like what parts i can buy
I didn't build the dimmer 'switch' (they are not switches, I hate that term). It's just a dirt-common, 500W incandescent dimmer from a hdwe store.
well, not to jump Al's thread, yes there is. I used the idea's Al presents, the heat source is a food dehydrator. And unless you are going to spend several hundred dollars on one, you will have to make your own temperature control. I posted the build in DIY. Al's electric supply is 220..ok 240 then. VV
My AC mains voltage is 240V. However, the ckt as drawn will work for 120V. If building from scratch, just use resistors of 1/2 the value I specified for 240V.
If modifying a commercially made dehydrator unit, just put an incandescent light dimmer in series with the heating element in the dehydrator (cut one lead going to the htg element and wire in the dimmer).
The commercial dehydrator's thermostat may not go low enough to suit 29C; be prepared to disconnect the thermostat from the commercial unit and replace it with something more appropriate, like the
Jaycar QT7200.
Folks clever with a soldering iron can open up the QT7200, desolder the little blue thermistor, lengthen its leads with some 2-conductor speaker wire and put the thermistor in the airflow in the dehydrator unit. This way, the entire thermostat unit does not have to be mounted inside the dehydrator, just its thermistor. The QT7200 unit can then be mounted to the exterior of the dehydrator, allowing one to see the LCD temp display and allowing easy access to the temp control buttons.
BudDryer v1.0 has gone through another engineering pass (now called BudDryer v2.0) and has been fully rebuilt since I wrote this, inclusive of installing a modified QT7200, the thermistor remote mounted as described above. There's now 6x 25W resistors in parallel on the heatsink, both fans have been replaced with Sunon 120mm axials and some knee-hi stockings have been put over the air inlet to the heatsink to keep gnats and dust out of it.
Sorry, I wish I could make this simpler, but it really
can't be made much simpler! You DO need some basic electrical/electronic skills to build this critter or mod up a commercially made unit. If you are not confident with your skills, find someone who is or find another way to dry your buds.