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Physically programming the future...
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reflow - a set on Flickr
I thought its finally time to step my soldering up a notch, and go reflow. This are the first quite successful experiments. I use an Atten hot air station for 50€. Some cheap solderpaste. and PCBs ordered through OSH park service, with a total turnaround time of 3 weeks in Austria. The boards are a quad 700mA constant current source using a step down converter. It can drive e.g. Cree MC-E high power LEDs for room lighting. Ah yes, and there is a pwm pin for each of the channels, and the channels are default off if the pwm pin is floating, so that there is no flickering while a non-included microcontroller boots.
Videos of the hot-air soldering:
fail: www.youtube.com/watch?v=U_TfwPdF9Uw
working: www.youtube.com/watch?v=P5zRiJ3uAVQ
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