FM transmitter circuit without coil
This is FM transmitter circuit without Coil,using inverter digital IC as main and controlled frequency is precise by crystal. Figure 1 the circuit diagram In Figure 1 is RF oscillator circuit which use a inverter IC1/2 and ceramic crystal filter 10.7 MHz to use drive IC1/4 – IC1/6 by through …
Automatic LED solar light 2
the Automatic LED solar Light is version 2. It has a higher performance, is brighter, compares the version 1. Because we use LED grow use a 12V battery