This is one of the many versions of this type of indicator that the reader can find on our website. This is from Mullard's 1969 documentation. The indicator is 95 uA (100 uA).
This oscillator provides a 1 MHz rectangular signal determined by the capacitors used. The circuit...
The circuit transistors, found in a 1974 documentation, may be the BC548. The circuit is used in...
The two previous circuits show the INA185 a current sensing amplifier in basic applications. This...