All items tagged with Solar cells and solar (53)

1-07-1983 | elektor july/august 1983 solar tracking system There are some hopes that the sun will become a main source of energy in the 21 st century. B...

1-07-1982 | slave flash trigger A triggering circuit for slave flash guns ensures that the "slave", flashes simul- eye. taneously with the main or maste...

1-07-1981 | solar powered pocket torch Pocket torches are handy things, but they have one great drawback: at the most inconvenient moments their batteri...