“Step 1: Build the 555 Timer Circuit Plug the 555 timer into the breadboard all the way at the top so that you’ll have room for the other parts of the circuits farther down. Then, connect the capacitors and resistors… — Oyvind Nydal Dahl Copy Share Image
“Step 2: Build the LED-Controlling Circuit Now, you’re going to connect the 4017 decade counter with resistors and LEDs. There are a lot of connections, so take as much time as you need to get them all correct. Plug the… — Oyvind Nydal Dahl Copy Share Image
“Check the Continuity First, check that you don’t have a short circuit between the positive and negative columns. To do this, use the continuity… — Oyvind Nydal Dahl Copy Share Image
“Step 4: Practice Your Reaction Time! All that’s left is to connect the battery to the supply columns. The button at the bottom of… — Oyvind Nydal Dahl Copy Share Image
“NOTE Many electronics enthusiasts also call continuity mode beep mode.” — Oyvind Nydal Dahl Copy Share Image
“MEET THE REACTION GAME CIRCUITS The reaction game will consist of three circuits: A 555 timer circuit that determines the speed of the game… — Oyvind Nydal Dahl Copy Share Image
“ADD A BUZZER TO YOUR GAME Congratulations: You’ve finished the last project in the book! Now, it’s up to you to decide what to… — Oyvind Nydal Dahl Copy Share Image
“Before you move on to the next step, check that this circuit is working by connecting an LED with a resistor to the output… — Oyvind Nydal Dahl Copy Share Image
“Check for Bad and Good Beeps Now, plug your battery clip into the breadboard as you would normally, but without the battery. Touch one… — Oyvind Nydal Dahl Copy Share Image
“Step 4: Use the Capacitor to Light the LED Watch the LED while removing the battery. The LED shouldn’t turn off right away when… — Oyvind Nydal Dahl Copy Share Image
“Shopping List A breadboard (Jameco #2212218, Bitsbox #CN204) with at least 60 rows. Breadboard jumper wires (Jameco #2237044, Bitsbox #CN236)—you’ll need around 35 for… — Oyvind Nydal Dahl Copy Share Image
“Check for Power If the connection to the NAND-gate IC is correct, use a multimeter to measure the output voltage from the start/stop circuit… — Oyvind Nydal Dahl Copy Share Image
“A Counter to Turn the LEDs On To control the LEDs, you’ll use a decade counter, which is an IC that counts input pulses.… — Oyvind Nydal Dahl Copy Share Image
“Step 5: What If the Game Isn’t Working? If you’ve followed my instructions so far, the circuits from Steps 1 and 2 should be… — Oyvind Nydal Dahl Copy Share Image
“Step 2: Add the Capacitor Connect your capacitor to the battery. Because the capacitor is polarized, place the pin marked with a minus sign… — Oyvind Nydal Dahl Copy Share Image
“Tools A wire cutter (Jameco #35482, Bitsbox #TL008) to cut small pieces of wire. A multimeter (Jameco #2206061, Bitsbox #TL057, Rapid Electronics #55-6662) to… — Oyvind Nydal Dahl Copy Share Image
“CHECKING CONNECTIONS AS A TEAM Finding circuit problems is called debugging, and it’s easier to do with some help. When you get stuck, ask… — Oyvind Nydal Dahl Copy Share Image
