Looks much better now!
Please remember: The centre pin (Collector) is in electrical contact with the mounting tab.
bg-electronics.de/datenblaet … 2%20TI.pdf
You have to use Mica insulator, thermal compound and shoulder washers.
[quote=“VEL255”]Looks much better now!
Please remember: The centre pin (Collector) is in electrical contact with the mounting tab.
bg-electronics.de/datenblaet … 2%20TI.pdf
You have to use Mica insulator, thermal compound and shoulder washers.[/quote]
Yeah, nothing is easy… hehe, sooo…
… more stuff ordered 
[ul]
10x Mica insulators (TO220 (GS4-TO220))
10x Shoulder washers (TO220 Black (IN220SW))
10x CuZn-Spacers (DA5M3X40)
10x CuZn-Spacers (DI3M20-5,5)
[/ul]
Already got non conductive thermal compound. 
Can’t wait for this to be finished, but wan’t it all to be done right. (or as right as I can)
The plan for this setup is to make it able to control the motorized screen for my projector (two relays needed), motorized adjustment for the projector (homemade, 1 pwm plus 2 relays), 230V on/off for the projector (using around 30W in stand-by 
), motorized curtains (don’t know the English word for them, it’t with small vertical blinds (going to hack a servo for this, then use that to determine the angle of the curtain, and control the motor to turn them))
A little update with all the relays and connections for them in place, plus some MacGyver style electronics…
Used heat shrink tubing to hold the wires nicely in place.
The positive to the relays is soldered to the underside of the print.
Relays connected, and again heat shrink tubing to arrange the wires.
The connections for the relays.
Looking good, nicely done!
And the new parts arrived today…
Shoulder washers used on both the transistors, and on the heat sink.
Mica insulators (non conductive thermal compound will be applied when it’s all done)
My little K8055 tower
And after soldering it all together, I discovered that they send me the wrong capacitors… Instead of some 25V they send me 10V 
(it is a 2x12V powersupply)
Tried to capture what was behind the heat sink, but it is the AC > DC bridge
All pictures can be found here: http://www.facebook.com/album.php?aid=140885&id=832693623
Have done some testing now, with a few different motors and got a interesting result… The small engine that lost all torque when connected directly to the K8055 runs smoothly when connected through the external transistor.
And now a good surprise! 
Been planning on how to make it start in the low rpm’s but i don’t think that is needed! I can turn the power supply off, and let the motor stop. Then switch it back on, and it starts running on one of the slowest speeds it can keep itself running.
The motor got a gear on, like all wiper motors, and it can run down to under 1 rpm! That is on 217, and can then run up to 0 of curse… (0 full speed, 255 off) very impressed with how it can handle that motor, plus the little other motor i had problems with before is also easy to run now.
youtube.com/watch?v=Idqc5fe5z8k
A little video of how slow it can run… it can run a bit slower, but won’t run smooth then.
It is also pretty strong, even on the low speed. I tested it with some 2mm nylon string, wrapped it around the axle and then hooked it up to one of the pins, and could make it snap.