This circuit only works with incandescent lamps and the frequency is adjusted in the pot, depending also on the capacitor. The triac must be equipped with a heat sink. The circuit is from an 80s manual.
Found in Maxim documentation from the 90s, this circuit makes use of components from the period. The...
Found in an English Maplin magazine in 1983, this circuit has an RIAA equalization. We suggest its...
In the figure we have a way of obtaining a 13,2 V with current up to 5 A using an integrated 7812...