98-100MHz FM transmitters using one transistor and 1.5 volts battery

This is the small FM transmitters using one transistor and 1.5 volts battery as power supply, in 98MHz to 100 MHz FM frequency range. The coil-L is 8 turns of 18 swg wire wound with a inside diameter air core of about 5mm. Then stretch the coil to width of 9 mm. The T1 use … Continue reading 98-100MHz FM transmitters using one transistor and 1.5 volts battery

Digital multimeter circuit using ICL7107

This is Digital multimeter circuit using ICL7107. We can modify the dc digital meter circuit to smart full function multimeter, that versatile available. For example : measure DC voltage, ACV, DC Amp meter, AC Amp meter and as the Ohms meter etc. Try to build this projects to use it really worth Fully enjoy Special … Continue reading Digital multimeter circuit using ICL7107

Super boost bass by UA741

This General purpose boost bass circuit is low pass filter that famous for decades over the years,can be used to increase the bass to the amplifier gain. The characteristics similar to a normal tone control circuits, It is designed for high frequency in the Flat form. But The low frequency or bass can add more … Continue reading Super boost bass by UA741

Many Electronic Circuits with PCB