Tire Pressure Gauge (CB26168E)

This circuit is from the 1992 Radio Electronics Handbook. The components used are from the period, with emphasis on the 2-digit display driver.

| Clique na imagem para ampliar |

Solar beacon (CB20489E)
The battery is charged by the photocell that keeps the low consumption beacon in the dark. The...
Sum and Difference Circuit (CB13926E)
The circuit transistors, found in a 1974 documentation, may be the BC548. The circuit is used in...
Low Power JFET Voltmeter (CB25571E)
We found this circuit in the April 1993 Electronics Now magazine. Almost any general-purpose JFET...