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
Super solar led light circuit
This is 3W solar LED light circuit made by my son, at day solar charge to battery then night LED light up without AC line, Relay control the solar current