This is the application note circuit of the integrated circuit used with the LASER diode. The circuit was obtained from the Electronics Experimenter's Handbook of 1992.
This conventional series reducer circuit reduces the voltage of a 12 V battery to the selected value...
In the figure we have a converter that generates a negative voltage from a positive voltage...
This circuit covers the bands from 1.8 to 150 MHz, with plug-in coils whose characteristics are...