Practical Memory Enhancer (1): Traditional Chinese Circuit Design Guide
In short: Traditional Chinese Practical Memory Enhancer (1). This entry documents a circuit & prototype taken from Chinese practical-technology literature, written for small-scale makers and home producers. The text below is the full English translation of the original Chinese workshop notes, covering materials and quantities, the step-by-step sequence, and the practical cautions recorded in the source. Roughly 1327 words of English technical text, translated and preserved without editing. It is intended for experimental and reference use, not for regulated or commercial certification.
memory enhancer(1)This device consists of a headset, a microphone and an audio amplifier circuit. When the user puts on the headphones, external noise is eliminated, creating a quiet learning environment where attention can be concentrated, creating prerequisites for learning and memory. When the user reads silently, the sound is added to the audio amplifier circuit through the microphone, and the amplified sound is sent to the ear from the receiver, so that the read content is stored in the "memory" or brain. Especially when learning a foreign language, it is easy to memorize words and correct your pronunciation.Figure 129 is the electrical schematic diagram of this device. This is an ordinary two-stage audio amplifier circuit. The sound is input by speaker BL1 (generation microphone), amplified by VT1 and VT2 (3AD6) in two stages, and then emitted by headphones. In the circuit, the collector-to-ground (positive power supply) voltages of VT1 and VT2 …
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