Test - Result Aug 11
1. Amplifying of the resulting signal failed to meet its desired mark therefore resulting in haphazard
interference pattern except for the principle beam at inclination 0 degrees from the perpendicular
to the plane of the transducers where the beams converge in phase by default ,thereby giving rise
to constructive interference. This point produced a very feeble quiver sensation when kept against
the palm at separation of 1cm. The reason for absence of a strong pressure point is clearly due to
the circuits inability to amplify the amplitude modulated wave. Therefore the transducers were fed
a signal of peak-to-peak voltage 2.3 V instead of the required 20V to feel a strong pressure point
2. Although the CMOS containing the complimentary pair of NMOS and PMOS seemed tempting
at first due to its relative ease of isolation of source and load ( a much required necessity for
Raspberry pi and to prevent interference of improper impedance matching at load from affecting
the signal generation at the source) due to its voltage controlled gate rather than BJT's current
controlled base, however a quick look shows the gain of CMOS to be very small as compared to
the gain of BJT which can very greatly be enhanced and made linear by bypassing the emitter
resistance with a capacitor. This increases the switching time of the BJT significantly beyond that
of CMOS which is again a much needed necessity.
3. The test showed a perfect correlation regarding the switching of the transistors upon stimulus from
PI.
4. Link to the video demonstrating the test
https://youtu.be/f9x8eXbNcak
