Jhs Variac Build 1 or 2 fan controller
Posted 18 July 2009 - 07:14 PM
heres some pics of the parts
the replacement enclosure box after i Lost the other one
it measures 13 7/8" long, 8" wide & 6" high.
Maplins 0.7A variac, its only got 2 screws holding the dial on unlike Rasta's & danlads which has 3 screws.
ill use the dial to mark the holes ill drill out.
for the thermometer, im using a honeywell T6360.
& instead of using the wired in adaptor extensions, i got these from bnq.
Posted 18 July 2009 - 07:21 PM
model no N13AW with the 8 pin socket DIN.
(din means it's mounted on din rail, the other type has pin coming out the bottom
to be mounted onto a circuit board)
e2a -- does anyone know what the 2 prongs are for ? me & danlaad havent a clue
This post has been edited by Joint hogger: 18 July 2009 - 07:23 PM
Posted 18 July 2009 - 07:39 PM
it cost about £1.50.
& once ive wired everything together, ill use self adhesive cable tie mounts & cable ties to keep everything tidy,
think they cost just over a quid from bnq.
as for the cable, i got some 1.5mm 3 core, think it was a tenner for 10m.
& not forgetting the 4 cable glands, they cost about 3 quid for the lot.
i havent bothered using an inline fuse but ill put a 3A fuse in the mains plug &
ill use a 20mm flat wood drill bit to cut out the holes for the glands.
now just have to copy danlads wiring diagram without electrocuting myself
if anyones going to attempt to build their own variac thermostat controller, please be carefull as BurstBud says
use a ip56 rated box... coz these suckers CAN KILL...
This post has been edited by Joint hogger: 18 July 2009 - 07:44 PM
Posted 18 July 2009 - 09:48 PM
its like a bloody turbo jet being in the same room that & the 6" x 600mm CF
plus i need to get the plants moved into the tent pronto, theyre starting to outgrow the cab,
& ive already had to top the mazars a bit as they were starting to suffer
ill post a cost tally but i think its around the ton mark
Posted 21 July 2009 - 12:14 AM
this is how i started out.
a weather proof box, a drill, 4 cable glands & a 20mm flat wood drill bit.
these pics are of the base of the lid, i decided to drill 1 hole on the lid for the thermostat cable
& 3 holes on the box's base (1 for power in & the other 2 for power to the 2 fans)
i also fitted the glands, theyre very easy to fit & you can tighten them up with your fingers.
the next thing to do is to mark the holes needed on the box lid for the variacs.
so place the variac on the lid & you get a rough idea of where you want to fit it.
i unscrewed the knob & dial from the variac & used the dial as a template to mark with a pencil.
i used a 7mm bit for the main hole & a 5mm bit for the 2 screw holes.
This post has been edited by Joint hogger: 21 July 2009 - 12:19 AM
Posted 21 July 2009 - 12:32 AM
this is the 2 variacs fitted, theyre not that big
oh, a wee tip to remember, before you take the dial & the knob off, move the knobs indicator to 0 power
& check the position of the arm on the back of the variac, this way you wont put the knob back on at the wrong power setting
the next installment will be in the next few days & ill be attempting to wire it all up together
Posted 24 July 2009 - 12:23 AM
Have fun and best of luck with the rest of the build mate doing a great job so far, enjoy quiet non-buzzing automated fan control
Closer to the heart
Posted 24 July 2009 - 07:59 AM
i went to start the wiring last night but im bloody hopeless at soldering ended chucking it ater a few failed attempts.
im just going to go to maplins before work & pick up some lucas female connectors to try instead.
Posted 24 July 2009 - 01:26 PM
Am I right in thinking the cheapo fan controller control the amps which causes the wine (Like dimmer switches)
Posted 24 July 2009 - 09:35 PM
I can see it's a fan speed controller I assume this is basically what my airforce speed controller is
i think its basically the same, its just a cheaper diy version with an added in room thermostat,
so, you can set the stat at say 30c & if the room goes above 30c, the variac kicks in at
full power until the temps drop below 30c then itll return to the lower voltage/speed.
I think I might as well buy the 3amp version instead.
it all depends on cost at the end of the day but reckon i could make a similar controller like
yours (airforce) for between £61 for the 0.75A & £71 for the 2.75A controllers.
could possibly do them cheaper if i used an old pc psu's enclosure box.
the IP66 ABS plastic enclosure costs £10.
the Variac is a 0.75A £34 (p&p inc) or a 2.75A for £44 (p&p included)
if you want a seperate spare socket to plug anything in (240v)
then you'd need 3 20mm glands £2.64 (88p each)
1 Socket Garden Lead 10m £9.50
1 socket extension head £4.00
1 15A connector block £1.00
anyway, back to the ongoing variac build,
im still a bit stuck on soldering the wires to the variacs but ive been
watching some you tube clips to try & get the hang of it.
does anyone know if i could use female spade connectors instead ?
Posted 24 July 2009 - 10:06 PM
yes, ya dancer thanks Promethius
the only thing holding me up now is i need to get some 8mm spade connectors,
on the maplin 0.75A variac, terminals 1, 2 & 4 are 6mm & terminal 3 is 8mm
its always something