Electronic Eyes For The Blind: Traditional Chinese Circuit Design Guide
In short: Traditional Chinese Electronic eyes for the blind. 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 2847 words of English technical text, translated and preserved without editing. It is intended for experimental and reference use, not for regulated or commercial certification.
Electronic eyes for the blindElectronic eyes with Doppler-like effects are a good friend for the blind. It uses ultrasonic waves to detect obstacles, and uses the time difference between transmission and reception to record the difference between the sent and received signals into audio. The frequency changes with distance, thus helping the blind to "see clearly" the obstacles in front of them.The operational amplifier A1 in Figure 118 generates pulses, and A2 shapes the pulses output by A1 into a sawtooth wave to control the voltage-controlled oscillator. The voltage controlled oscillator consists of A5, A6 and A7. A3 generates a square wave, and the positive half cycle of the square wave causes A1 and A2 to work (use F007 for A1 to A7). The voltage controlled oscillator generates a triangular wave with a frequency of 40kHz and is emitted through the transistors VT6, VT4, VT5 and the ceramic oscillator BC2. …
Sign in to unlock
One-time payment per article, billed in credits (1 $ = 100 credits). You will review the invoice and the non-refundable digital-asset policy before anything is charged. The PDF is generated on demand and embeds a licensing watermark.
Unlock this article
One-time payment · permanent access after unlock · 1 $ = 100 credits
Member level pricing for this article
| Level | Cumulative top-up | Discount | Your price | You save |
|---|---|---|---|---|
| Free | Free | — | 4,734 credits | — |
| Bronze | $100.00+ | 2% off | 4,639 credits | 95 credits |
| Silver | $1,000.00+ | 5% off | 4,497 credits | 237 credits |
| Gold | $5,000.00+ | 10% off | 4,261 credits | 473 credits |
| VIP | $20,000.00+ | 15% off | 4,024 credits | 710 credits |
Prices are billed in credits (1 $ = 100 credits). Your level upgrades automatically as your cumulative top-up grows. Top up to unlock a higher discount ›
All articles are digital assets. Once a PDF is downloaded, the purchase is final and non-refundable.
Please log in to unlock this article.
Payment Methods
pay@viprole.com
Lei Cheng
pay@viprole.com
Lei Cheng