Behind every great inventor, goes the saying, is a pile of failed experiments. Here I’m going to document some of my cases of finding out the hard way what doesn’t work.
Having found a mains transformer with a secondary rated at 12V, 1A in my junk box, I thought this might do for the basis of an inverter to run a compact fluorescent lamp. So it just needs something to drive it.
Using two TDA2030s to build an inverter to run a CFL doesn’t work. Although the left-hand one oscillates quite nicely and the right-hand one inverts it properly, applying a nice square wave across the
primarysecondary of the transformer, the output sags hopelessly under load. The output impedance of the TDA2030 is just too high. Where we saw 9V at the transformer secondary and a promising 170V at the primary into an open circuit, this drooped to a pathetic 90V under load. All the lamp managed was a feeble glow.