This modulated transmitter for a light beam communication system was found in the 1991 Electronics Experimenter Handbook. The circuit modulates a LASER diode.
This circuit is from a 1976 publication. The circuit formed by L1 and C1 must be designed...
This interesting circuit found in an Elektor from the 90s controls loads in four quadrants of the driving...
This third-order Butterworth filter was found in American documentation from the 1980s. Formulas for...