The circuit below is suggested by National Semiconductor in technical documentation on the LM3909. The circuit is powered by a single battery and has a very low consumption.
Using the HA2400 this circuit has its output voltage digitally programmed from the references...
Assembled with SMD components this circuit can be very small. The range is a few tens of meters. We...
This circuit can be used as a shield when its supply is 5 V. in this case we can exchange the...