. Electronic apparatus for biological research . p'°w g 1000 release g q Figure Relay circuit drawn with attached-contact notation of the coil in ohms, while the code Ajl), for example, identifies the relay as A and indicates that it has 3 contacts. Special properties ( slow release or high speed) of the coil are shown symbolically. The contacts are labelled 52 R 1 A2 B3 G/3 CI 7 500 500 \B} A A e/3 500 t. Kn 500 A/3 1000 gC/1 Figure Figure circuit redrawn with detached-contact notation with the relay's code letter, and their serial number ( A2, the second contact set on

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. Electronic apparatus for biological research . p'°w g 1000 release g q Figure Relay circuit drawn with attached-contact notation of the coil in ohms, while the code Ajl), for example, identifies the relay as A and indicates that it has 3 contacts. Special properties ( slow release or high speed) of the coil are shown symbolically. The contacts are labelled 52 R 1 A2 B3 G/3 CI 7 500 500 \B} A A e/3 500 t. Kn 500 A/3 1000 gC/1 Figure Figure circuit redrawn with detached-contact notation with the relay's code letter, and their serial number ( A2, the second contact set on relay A). The usefulness of the 'detached-contact notation' cannot be emphasized too strongly. It provides a complete and convenient symbolism, and once it has become famihar relay circuits are easy to follow. The perpetration 511

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Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity