Circuits

Description: A simple circuit that uses a sound-activated chip to turn on music. The Integrated Circuit (IC) labeled UR contains a ready-made circuit to create music; without it this project would require you to make a much larger circuit.​

Parts Needed

• Battery B1​

• Switch S1​

• Whistle Chip WC​

• Music IC U1​

• Speaker​

• Two 2-snaps​

• One 3-snap​

• One 4-snap​

• One 5-snap​

• Red and Black snap wires​

First Layer

Step 1: Place Battery C5-E5 with positive end at C5​

Step 2: Place U1 Music IC with 3-snaps at the top, covering c1-c3 and d1-d3​

Step 3: Place 5-snap a1-a5​

Step 4: Place 4-snap e1-e4​

Second Layer

Step 5: Place WC whistle chip a1-c1​

Step 6: Place 3-snap a2-c2​

Step 7: Place S1 Switch a5-c5​

Step 8: Place 2-snap e4-e5​

Step 9: Place 2-snap d1-e1​

Step 10: Place speaker a10-c10​

Step 11: Place black wire a4-a1

Step 12: Place red wire d3-c10​

Results: This circuit plays a tune when you turn the switch on After it plays the tune the first time it waits for you to make a loud sound over the whistle chip (WC). Once you make a loud sound or vibrate the whistle chip it will play the tune again.​

You could connect the speaker with snap bar connectors rather than wires, but then the speaker may make enough vibration on the board to restart the whistle chip by itself!​ An image of the circuit is shown on the right. 

Description: This circuit uses the Music IC and the press switch to simulate a doorbell.​

Parts Needed

• Battery B1​

• Switch S1​

• Switch S2​

• LED D1​

• Music IC U1​

• Resistor R1​

• Speaker

• Two 1-snaps​

• Five  2-snaps​

• One 3-snap​

• One 5-snap​

• One 6-snap​

First Layer​

Step 1: Place 6-snap a2-a7​

Step 2: Place D1 LED c1-e1​

Step 3: Place U1 Music IC with three snaps at top, covering c2-c4 and d2-d4​

Step 4: Place speaker b6-d6​

Step 5: Place battery c7-e7 with positive end at c7​

Step 6: Place 5-snap e2-e6​

Second Layer​

Step 7: Place s2 switch a2-c2​

Step 8: Place 3-snap a3-c3​

Step 9: Place R1 resistor d4-d6​

Step 10: Place 2-snap a6-b6​

Step 11: Place S1 switch a7-c7​

Step 12: Place 1-snap c1​

Step 13: Place 1-snap e1​

Step 14: Place 2-snap d2-e2​

Step 15: Place 2-snap e6-e7​

Third Layer

Step 16: Place 2-snap c1-c2​

Step 17: Place 2-snap e1-e2​

Description: This project introduces the variety of sounds the Space War IC can make.​

Parts Needed

• Battery B1​

• Switch S1​

• Switch S2​

• Space War IC U3​

• Speaker​

• One 2-snap​

• Three 3-snaps​

• One 4-snap​

• One 5-snap​

First Layer

Step 1: Place 5-snap a1-a5​

Step 2: Place U3 Space War IC with two snaps at top, covering c1-c3 and d1-d3​

Step 3: Place battery c4-e4 with positive end at c4​

Step 4: Place 4-snap f1-f4​

Step 5: Place 3-snap a1-c1​

Step 6: Place speaker a3-c3​

Step 7: Place 3-snap a4-c4​

Step 8: Place S2 switch d1-f1​

Step 9: Place 3-snap d2-f2​

Step 10: Place S1 switch d3-f3​

Step 11: Place 2-snap e4-f4​

Results: Activate this circuit by flipping the slide switch or pressing the press switch. Do both several times and in combination to hear a range of space war sounds.​

Description: This project shows you how to build a police siren that is controlled by light.​

Parts needed:

• Battery B1​

• Switch S1​

• Alarm IC U2​

• Music IC U1​

• Speaker​

• Photoresistor RP​

• One 1-snap​

• Four 2-snaps​

• Two 3-snaps​

• One 4-snap​

• One 5-snap​

• One 6-snap​

First Layer

Step 1: Place battery e6-e8 with positive end e8​

Step 2: Place U2 Alarm IC with three snaps at the top, covering c4-c6 and d4-d6​

Step 3: Place U1 Music IC with three snaps at the top, covering c1-c3 and d1-d3​

Step 4: Place 6-snap a1-a6​

Step 5: Place 4-snap a8-d8​

Step 6: Place 5-snap e1-e5​

Second Layer​

Step 7: Place speaker d6-d8​

Step 8: Place S1 switch a6-a8​

Step 9: Place RP photoresistor a3-c3​

Step 10: Place 3-snap a2-c2​

Step 11: Place 3-snap a5-c5​

Step 12: Place 2-snap d1-e1​

Step 13: Place 2-snap d3-d4​

Step 14: Place 2-snap e5-e6​

Step 15: Place 1-snap e8​

Third Layer

Step 16: Place 2-snap d8-e8​

Results: Cover the photoresistor RP and turn switch S1 on. A police siren with music is heard for a while and stops; then you can control the siren by covering or uncovering the photoresistor.​

Description: Build a police siren and other sounds that are controlled by clapping your hands.

​

Parts needed

• Battery B1​

• Switch S1​

• Speaker​

• Alarm IC U2​

• Music IC U1​

• Resistor R1

• Whistle Chip WC​

• Six 2-snaps​

• Three 3-snaps​

• One 4-snap​

• One 5-snap​

• One 6-snap​

First Layer

Step 1: Place battery e7-e9 with positive end e9​

Step 2: Place S1 switch b9-d9​

Step 3: Place speaker b8-d8​

Step 4: Place U2 Alarm IC with three snaps at the top, covering c4-c6 and d4-d6​

Step 5: Place U1 Music Ic with three snaps at the top, covering c1-c3 and d1-d3​

Step 6: Place 6-snap a1-a6​

Step 7: Place 4-snap a7-a10​

Step 8: Place 5-snap e1-e5​

Second Layer​

Step 8: Place R1 Resistor d6-d8​

Step 9: Place WC Whistle chip a1-c1​

Step 10: Place 3-snap a2-c2​

Step 11: Place 3-snap a5-c5​

Step 12: Place 2-snap a6-a7​

Step 13: Place 2-snap a8-b8​

Step 14: Place 2-snap a9-b9​

Step 15: Place 2-snap d1-e1​

Step 16: Place 2-snap d3-d4​

Step 17: Place 2-snap d9-e9​

Step 18: Place 3-snap e5-e7​

Results: Turn switch S1 on (toward the label), and a police siren is heard and then stops. Clap your hands, and it will play again. Note, however, that music can be heard faintly in the background of the siren. If clapping does not trigger the sound, tap the whistle chip WC with your finger.

Description: This project shows another way of using the space war integrated circuit.​

Parts Needed

• Battery B1​

• Switch S1​

• Space War IC U3​

• Alarm IC U2​

• Speaker​

• Motor M1​

• Two 1-snaps​

• Four 2-snaps​

• Three 3-snaps​

• One 5-snap​

• One 6-snap​

First Layer

Step 1: Place battery c7-e7 with positive end c7​

Step 2: Place U3 Space War IC with two snaps at the top, covering c4-c6 and d4-d6​

Step 3: Place Alarm IC u2 with three snaps at the top, covering c1-c3 and d1-d3​

Step 4: Place 6-snap a1-a6​

Step 5: Place 1-snap a7​

Step 6: Place 5-snap e1-e5​

Second Layer​

Step 7: Place S1 Switch e5-e7​

Step 8: Place Speaker a6-c6​

Step 9: Place M1 motor a2-c2​

Step 10: Place 3-snap a3-c3​

Step 11: Place 3-snap a4-c4​

Step 12: Place 3-snap a7-c7​

Step 13: Place 2-snap d1-e1​

Step 14: Place 2-snap d3-d4​

Step 15: Place 1-snap d5​

Third Layer

Step 16: Place 2-snap a6-a7​

Step 17: Place 2-snap d5-e5​

Results: This circuit is based on the space war in Project 19, turn on the switch and you will hear exciting sounds, as if a space battle is raging!​ The motor is used here as a connecting bar and will not spin.