This basic TTL watch and minute clock circuit was found in European documentation from the 1970s. The power supply is not included and is given in CB19635E. The circuit uses common anode displays.
This simple circuit for a high impedance magnetic phone (500 ohms or more) has been found in a...
This 3 V rail to rail buffer was found in a National Semiconductor documentation. The gain is unit....
We found this circuit in the September 1971 issue of Radio Electronics magazine. The sensor is an...