11CIRCUITS THAT REMEMBER INFORMATION
In Chapter 9, you learned how to store bits using switches. As long as the switches don’t change, the bits stay the same. But you have to manually set the switches, and that’s not very efficient. In Chapter 10, you learned about logic gates and how you can use them to play with ones and zeroes. Now, I’ll show you how to use logic gates to make electronic memory that saves bits, even after you change the input. At the end of this chapter, you’ll build your own electronic coin tosser!
SAVING ONE BIT AT A TIME
One simple memory circuit is an SR latch. You can create an SR latch with two NOR gates, and one latch ...
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