This circuit with the HA2400 was found in the March 1980 Radio Electronics magazine. The circuit has digital-gain control and must be powered by a symmetrical 15 V source.
August 2017 - Mouser Electronics is now offering the Diodes Incorporated AH1389 Hall Single-pole...
This circuit is from a European publication from the 70s. The transistor used is from the time and the...
This circuit makes it possible to recover programs recorded on cassette tape as was common in MSX...