50W Inverter (CB21485E)

This circuit for a frequency of 40 kHz was found in an old Electronic Design. There were no constructive data for the transformer used in the output.

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126 MHz Logic Probe (CB21195E)
This logic probe was found in a Popular Electronics from the 90s. The circuit is TTL and must be...
Comparator for TTL (CB20142E)
The integrated circuit used in this configuration is not common today. The zener determines the...
Bipolar Transistor Crystal Pierce Oscillator (CB13084E)
The original frequency of the Pierce Oscillator with bipolar transistor is given by the crystal, which...