This battery-powered micropower supply was shown in Radio Electronics magazine in 1991. The maximum current is 170 mA. and the integrated circuit is the MAX655 from Maxim.
In the figure we have a circuit suggested by National Semiconductor, using an operational...
We found this circuit in a Popular Electronics from 1992. It modulates an infrared LED with a...
This receiver amplifier (booster) is from American documentation from the 1970s. The integrated circuit...