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Use 2 LDR. conect both one side on the 5V and the other side on a 1K resistor to gnd.
The motor objective is to make both LDR voltages to the same level, case one os greater than other simply turn the motor and compare again.
This idea is simple and Works extremmly well, You can do without...
Cmos use very low power TTL use veru Hugh power
Cmos have a extremelly high fani in / fanout While TTL not
Cmos can be used in many VCC from 2 to 15 V TTL only 5V
Both are deprecated Technologies no more in use in new designer, Fpga do all things faster, cheaper and cooler
The table suplyed have all you need.
You must at least read the left colun off the graph
VCC = Power Suply
VOH = Typical tension output for level 1
VIH = Minimum tension to be considerad level 1
VT = Transition on undefenied zone ( avoid stay there )
Vil = Maximum tension on input to be...
Re: Reducing pin usage in microcontroller
4 for operation selector-> init ,manual, automatic,use defined.
Use analog for this with only 1 analog you can take all 4 swicth
USe R , 2R , 4 R, 8R, 16 R in serie, and put each button in paralell with the resistor, You can know easily what buttom is...
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