The circuit is from the Linear applications Handbook of the National Semiconductor of 1994. The components used are not common today.
The range for this transmitter is up to 100 m. The signal can be received by any circuit tuned for the...
The operational of this amplifier can be the 741 and the resistors R1 and R3 are of 10 k. R2B is...
We found this circuit in a 1978 documentation. Its purpose is to avoid current spikes in a small...