This bench circuit was found in Radio Electronics magazine from June 1958. The circuit does not have an external power supply. The circuit generates signals from 12 Hz to 180 kHz in 4 bands.
If the reader is skilled, he can mount this spy micro-transmitter with SMD components and obtain an...
This circuit is suggested by an English publication from 1980. It is an RF detector that uses a...
This configuration appears in other points of the site both in articles and project suggestions. The...