This astable multivibrator was obtained from a Mullard documentation from 1960. The components depend on the used transistor and on the frequency, as shown in the table next to the diagram.
This non-inverting AC amplifier was found on a Popular Electronics. The setting applies to any...
This circuit supplies 5 V from two AA batteries. The output current is 4 mA, resulting in an 11 mA...
With this regulator we can have currents of up to 4 amps with 5V at the output. The transistor can be...