Apr 28, 2008 | Red Light District
We’d better not risk another frontal assault, that rabbit’s dynamite! We need to design the rest of the power supply circuitry. This should be relatively simple, other than the complication discussed earlier, the need for separate B+ supplies for the...
Apr 28, 2008 | Red Light District
Who are you, who are so wise in the ways of science? What do we ask of the driver stage? Concomitant with low output stage bias voltage requirement is low drive requirement. And here, the EL84 is truly a star. All it needs is roughly 11V peak (7.9VRMS). The input...
Apr 28, 2008 | Red Light District
How does this bear up in practice? Let’s look at dynamic impedance measurements of red LEDs in the singular and then arrayed as we propose to do here. Examination of the published voltage versus current curves of a number of ordinary LEDs indicated that at 10mA...