Electronic scale (CB7906E)

Using components of the time, this 3 and half digit scale was found in an Electronics Now from the 90s. The circuit is powered by a 9 V battery.

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LDR Sensitive Passage Sensor (CB24482E)
This circuit is more sensitive than the previous one, in the sense that we can use weaker and more...
100-second monostable (CB25671E)
This 3-transistor timer was found in the January 1994 issue of Electronics Now magazine. The...
Bistable with two 555 (CB1294E)
This circuit appears in other articles in this section, but it is very interesting. It is a...