A larger speaker will give a louder sound with this circuit. An alkaline or ni-cad ( nickel- cadmium) battery is recommended for use with the siren. WATER-LEVEL ALARM The water-level alarm shown in Fig. 1-10 may be used as a warning ofanbsp;...
Title | : | Electronics and microcomputer circuits |
Author | : | Roger L. Tokheim |
Publisher | : | Computing McGraw-Hill - 1985 |
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