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This circuit was obtained in 1965 General Electric documentation. SCRs can be modern common equivalents. The circuit fires with positive pulses. The load can be up to 7 A.
This 1-transistor reflex receiver was found in a 1963 publication. The coil is for the mid wave...
Found in a European magazine from the 90s, this circuit emits beeps that are several seconds apart to...
This interface or shield circuit for instrumentation was obtained in a publication from the 90's....