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DO: Output Digital
data input 2
This setting can be easily overridden by tying the MS1 or MS2 pin to ground
it first intercepts one half of the PIR sensor
Data comparison circuits
74HC191 (4-Bit Counter) idler pulley DO: Output DigitalThe 74HC191 are asynchronously presettable 4 bit binary up down counters. They contain four master slave flip flops with internal gating and steering logic to provide asynchronous preset and synchronous count up and count down operation. Specifications Synchronous reversible counting Asynchronous parallel load Count enable control for synchronous expansion Single up down control input Output capability: standard 74HC191 datasheet
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