Other amplifiers of the series like the MC3301, MC3401 and LM2900 can be used in this circuit. We found this setting on Motorola's Linear Interface ICs. The circuit uses a magnetic sensor.
We found this circuit in a 1999 publication. All the components used are still common and the...
This circuit was found in a 1999 English magazine, but can be easily assembled with BC548...
We found this circuit in a 1977 technical documentation. The circuit can use a TIP31 for Q1 and a...