Understanding…

(Radio Shack . Part No. 270-325) 2. 1.99 Op-Amp LM741 (Radio Shack . Part No. 276-007) 1 0.99 220 Ohm resistor (Radio Shack . Part No. 271-1111 ) Colors: red, red, brown 1 0.99 1000 Ohm resistor (Radio Shack . Part No. 271-1118) Colors: brown, black, red 2 0.99 Wire (Radio Shack . Part No. 278-1215) 1 inch 1.00 LED (Radio Shack . Part No. 276 ... ................
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