1. It can detect radiation from the Computer or TV from a distance of 2 feet or more.
The speed of running light depends on the intensity of radiation. Fast running light indicates high
amount of radiation and vice versa.
IC CD4033 is the decade counter with7 segment display driver. It has seven outputs to
drive LEDs or Seven segment display. The clock input (pin1) of IC is very sensitive and readily
accepts energy from the electromagnetic radiation even from a long distance. This property of
the IC CD4033 is exploited here to measure the intensity of radiation. The reset pin 15 of IC is
connected to C1 and R1 to reset the IC after completing a cycle. So that the functioning of IC
continues till the input pulses cease.
2. Areal
A small length plastic wire can be used as areal. A telescopic areal used in pocket radio will give
an elegant look to the gadget
Test
Bring the areal close to the TV or CRT monitor of computer. All the LEDs light up one by one
giving a running pattern. The speed of running light depends on the strength of radiation. Move
away the unit from the monitor. As the diastance increases, speed of running light decreases.
Finally all the LEDs stop glowing. This is the point without the radiation. Check all the electric
instruments and mains wiring using the device and find out how much radiation is emitting.
Circuit 2
