CMOS XTAL Oscillator (CB22400E)

We found this circuit in an old English documentation. The circuit can employ other gates and change the frequency of the crystal.

Electronic Dice (CB12221E)
This TTL dice is from an old publication from 1978, but it can still be assembled, as the...
Full wave rectifier (CB9455E)
This precision signal rectifier was found in an Electronic Design. The components used are from...
OR gate LM3900 (CB14200E)
We found this setting in the National Semiconductor Linear Applications Handbook. The base is an...