This battery circuit provides a charging current of 500 mA depending on the solar panel. The switching circuit is from a National Semiconductor documentation from the 90s.
This amplifier with two transistors for analog instruments was found in a Raytheon publication from the...
Using a ceramic resonator, it is possible to vary the frequency between 4.9 MHz and 5 MHz. The...
This operational filter configuration was obtained in a 1980s publication. The calculation is made by the...