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File:555 internals.gif (350 × 224 (11 KB)) - 03:03, 7 May 2013
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- [[File:555 internals.gif|frame|right|Figure 1 - the internals of the NE555N timer chip connected to Figure 3 shows the complete schematic for the control logic and the fan. 555 is the timer chip. D1 and D2 control which section of the potentiometer P19 KB (1,606 words) - 01:11, 1 July 2013