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/diy/ - Do It Yourself

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>> No.1300075 [View]
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1300075

>>1300069
So I’m guessing this is the schematic for the second pulse (pic related). So bit 2 on that schematic is coming (left side of schematic) from pins 1&9 on the ic and if I follow that to the output it goes through R2 which is the 1k resistor.
What’s going on along the bottom? Does it just go through the LED and LR2 to ground, what is PJ301b?

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