Found in Motorola's 1967 documentation this circuit can use any general-purpose transistor. The signal should be applied to a good amplifier. The noise diode can be replaced with a common one.
This circuit can turn-on (only) a load (relay or lamp) when S1 is pressed. The circuit can be used as...
The EVAL-CN0397-ARDZ evaluation board from Analog Devices is compatible with Arduino shields to...
This receiver uses only one transistor but has excellent sensitivity to the mid-wave range. The...