Memory Strengthener (the 1st)

Published:2011/7/29 3:02:00 Author:Felicity | Keyword: Memory Strengthener | From:SeekIC

Work of the circuit The circuit consists of low-frequency Oscillator, negative feed-back amplifier, mike BM, converting switch S and earphone jack XS. (It is showed in picture 9-75.). Low-frequency Oscillator consists of six non-gate IC IC (Dl-D6) within the non-gate D5, D6 and resistor R3, capacitor C2. Negative feed-back amplifier consists of the Dl-D4 within IC and resistor R2. If you want to use it as a hearing-aid or memory strengthener, you should put S in site 1. Here BM turns the sound signal it collects into electric signal which drives BE to make sound after being adjusted. If you want to use it as a hypnotizer you should turn S to site 2. Here the signal produced by low-frequency Oscillator will turn to the sound.The sound makes people sleepy after being amplified by negative feed-back amplifier.



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