VV Weller BP645

[bstedh]

OKR-T/6-W12-C

Digi-Key - 811-2179-ND (Manufacturer - OKR-T/6-W12-C)
http://www.murata-ps.com/data/power/okr-t6-w12.pdf

The one I want will be OKR-T/6-W12-EC The E indicates normally off control circuit.

Forced On/Off Control
Blank = Standard on/off, open pin = ON
E = Forced enable, open pin = OFF, see specs

Also the T/6 is 6 amp instead of 3 amp.

A quick search shows nobody has the EC model...

 

[bstedh]

Ok, I see how your circuit is working. I had to look it over again to figure it out. Grounding the control pin through the resistor keeps the circuit off and then applying a positive to the pin turns it on. I didn't read the specs on the control pin close enough. The E version would eliminate the need for the resistor and negative wire but nobody has them so guess there isn't much of an option.

This regulator is working awesome. Not a watt of heat wasted. two 14500 are lasting about a day and a half with heavy vapping.

[Standard version]
Positive Logic ON = +1.5 V. to +Vin max. or open pin
OFF = –0.3 to +0.4 V. max. or ground pin

[“E” version]
Positive Logic ON = +2 V. to +Vin max.,
49KΩ pulldown to ground
OFF = open pin or –0.3 to +0.4 V. max.

 

[bstedh]

After reviewing the specs on the regulator again I had an epiphany...

As the wattage for these is fairly high I am going to have to un-mod a part of this thing and put the RCA jack back on and mod my connector. With the 14500 batteries and the regulator this will double as a very good variable temperature soldering iron. The stock 6W was almost useless other than for tiny tiny stuff. With the new batteries and regulator this may actually make a very decent all use iron.

 

[bstedh]

My weller is dead!!!!

I'm not sure what happened. after several days of use it just quit. I noticed however that when I hit the switch I can hear a faint clicking noise coming from the regulator. I opened it up and checked for shorts and opens and didn't see anything so I popped a carto on it and tried it with everything open and it didn't work right away but then all of a sudden I heard a sizzle from the carto.

I am going to tear it down and use a heavier gauge wire and correctly sized heat shrink to see if that helps. I already miss this thing. Using my standard PV's just are not anywhere near as good.

 

[Gummy Bear]

Sorry to hear your sad news.
A month ago I dropped mine and in trying to catch it I goofed up and stomped it. So I know how you feel.

 

[bstedh]

I think the variable resistor may be having an intermittent open... Not positive but I don't have time to dig into it today =[

 

[bstedh]

Well I re-did everything with heavier gauge wire and it is working good again. I'm not sure if the problem was a short or other such. Of course my first re-build I hooked up the trimmer circuit wrong and wast stuck at 7V... =[ That was an awful taste...