110 electronic alarm projects

110 electronic alarm projects

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The Figure 4.1 circuit can be used with any low-voltage self- interrupting alarm bell that draws a current less than 2 A. The ... The relay 13 5V RLA 12V 2N3704 a€ž Q, Cr* 2N37CW .12V Out RLA 2 (no) -0V Figure 4.4 Improved light-activated alarmanbsp;...

Title:110 electronic alarm projects
Author:R. M. Marston
Publisher: - 1977


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