7-segment display driver (CB20551E)

We found this circuit in English documentation from 1996 for PCs. The circuit is for common cathode display.

Pass Through Alarm (CB15919E)
In the figure we show how to excite a CMOS port by interrupting light on a Darlington...
Didactic Comparator (CB1431E)
With this circuit, of a 1977 Radio Shack documentation, it is possible to demonstrate the...
Barometer (CB7068E)
Found in an Electronic Design from the 90s, this circuit makes use of contemporary components,...