I made this circuit, based on a website with designs to power LEDs using a dynamo. In the breadboard, it worked as planned. However, when I soldered the components into stripboard, it didn't work. I tried using my multimeter to check the diodes and when it should read "1.", it reads about .600 (reads about .200 in other direction) - could this be because they're in a circuit instead of isolated or could be because of heat damage from soldering?