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摄影器材商店里所售价格在二三百元左右的放大机,一般都不具备自动同步计时功能。而有此功能的,其价格又很昂贵。由于无放大同步计时功能,因而在放制影片操作中十分不便,在实际运用中也不安全。笔者利用市场有售的半成品电子元器件,组装了一只用于放大机的电子数码显示同步计时钟,不但方便实用、价格低廉,且计时准确、美观大方。具体制作方法如下。一、元件与材料(1)购一块电子计时数码显示板,型号为LTM—8301E(广东
Photographic equipment stores in the price of about two or three hundred or so amplifier, generally do not have the automatic synchronization timing. With this function, its price is very expensive. Because there is no amplification timing function, which is very inconvenient in the operation of the release of the film, in actual use is not safe. I use the market for the sale of semi-finished electronic components, assembled a magnifying glass for electronic digital display synchronous clock, not only convenient and practical, low cost, and accurate timing, elegant appearance. Specific production methods are as follows. First, the components and materials (1) to buy an electronic timed digital display, model LTM-8301E (Guangdong