The transistor can be a BC548 and the coil has the following characteristics for 1 MHz. L1 has 80 turns of wire 28 in a ferrite rod and L2 of 30 and 40 turns.
The MOS field effect transistors of this circuit are not very common, as it is a project from the...
This old circuit uses na operational amplifier not easy to find in these days. But the circuit can be...
This circuit consists of an astable multivibrator whose frequency changes according to the light...