Free Simple Circuit Diagram
This AM/FM antenna booster circuit amplify the broadband signal from antenna. This antenna booster should work fro FM, AM, and SW receivers. Here is the schematic diagram of the circuit: Using this antenna booster circuit, for short wave reception, an 8″ antenna would produce a strong signal level equivalent to a 20 to 30 feet wire antenna. This antenna booster […]
Read more
What is A pH Meter? A pH meter is actually a precise voltmeter that measures the generated voltage of a pH electrodes. The requirement of such meter is high input impedance and has the gain of voltage-pH conversion. The standard pH probe generate voltage about 59 mV per pH, so all we need is a pre-amplifier with high impedance input […]
Read more
Pulse position modulation is similar to pulse width modulation, but the frequency is not constant. Like pulse width modulator circuit, pulse position modulator can be easily constructed using 555 IC. Here is the schematic diagram of the circuit: If you look at the output signal plot in the above timing chart, and compare it with our previous pulse width modulation, […]
Read more
A very simple pulse modulator circuit can be built using 555 IC. In 555 chip, a special modulator input is available at pin 5. Here is the schematic diagram of circuit: This pulse modulator circuit need an external clock signal to work. You can build an astable multivibrator using the same 555 IC or using any other type of square […]
Read more