Solder paste is happy at less than 50degF and above ... a bleed resistor to force the MOSFET to turn off. You can find more pictures of his project on Flickr.

The syringe dispenses solder paste, and rotating the diodes around, [Alt] is able to put a melted solder blob anywhere on a piece of perfboard. He put up a reasonably well focused video ...

SHENMAO America, Inc. is proud to announce the launch of its advanced solder paste, PF606-P275. This innovative lead-free, no-clean, zero- halogen solder paste is specifically designed for fine ...