Through this particular little electronic circuit we are able to achieve an effective research laboratory instrument. The circuit indicates using the flashing of the LEDs when there's an electrostatic fields available. The frequency with which the LEDs flash shows proportionally the magnitude of existing static field.
The circuit operates using a FET transistor, as a result of its high impedance varies its actions together with the small current of electrons delivered by the antenna with which static electricity is captured. As soon as the FET varies its electrical resistance in accordance with the input current via the gate, the integrated circuit 555 accordingly varies the switching frequency of the LEDs. Be aware that the integrated circuit is set up using a fundamental oscillator, in which the frequency relies on the values of the capacitor C1 and the resistor R1 between pins 6 and 7, between which the FET transistor has been mounted.
Furthermore, the circuit possesses a couple of output terminals that offer a variable frequency signal whose average magnitude is proportional to the level of static electricity existing across these terminals. A multimeter could be attached for the measurement and quantitative evaluation of the detected static electricity.