This circuit was obtained from a 90s Radio Electronics. The value of R1 determines the scale according to the table next to the diagram. The power suppley must be symmetrical.
This circuit was found in a 1960s documentation, providing a 2,000 gain amplified output. | Clique na...
Frequency in this oscillator is controlled by a crystal. Any 1 MHz to 15 MHz can be used. The JFET can...
This small source is suitable for low consumption equipment that uses batteries. The circuit is...