100 Hz Second Order High Pass Filter (CB25815E)

This filter with the 741 op amp was found in the February 1995 Electronics Now magazine. The power supply must be dual.

12 W amplifier with Muting TDA1910 (CB15229E)
This circuit provides a power of 12 W with 24 V of supply, consuming a current of 820 mA and...
Christmas light (CB7591E)
Found in a RE Experimenter Handbook from the 90s, this circuit is intended for the use of LEDs in...
Keep the Battery Charged (CB17355E)
We found this circuit in a 1990 documentation. Its purpose is to maintain the charge of a battery, the...