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Project #124

Light-controlled Lamp

Project #125

Motor-controlled Lamp

Project #123

Sunrise Light

-60-

Build the circuit to the left. Cover the photoresistor (RP), turn the slide switch

(S1) on, and notice that the lamp (L1) is off after several seconds. Place the

unit near a light and the lamp turns on. Cover the photoresistor again. The

lamp turns off. The resistance of the photoresistor decreases as the light

increases. The low resistance acts like a wire connecting point C to the

positive (+) side of the battery activating the music IC (U1).

Use the circuit from Project #124. Remove the photoresistor (RP) and connect

the motor (M1) across points A & B. The lamp (L1) lights for a few seconds and

then turns off. Turn the slide switch (S1) on and turn the shaft of the motor and

the lamp will light. As the motor turns, it produces a voltage. This is because

there is a magnet and a coil inside the motor. When the axis turns the magnetic

field will change and generate a small current in the coil and a voltage across

its terminals. The voltage then activates the music IC (U1).

Cover the photoresistor (RP) and turn on the slide switch (S1). The

LED (D1) is off, but if you wait a long time then it will eventually light

up. Uncover the photoresistor and the LED will light up in just a few

seconds. Push the press switch (S2) and reset the circuit.
The resistance of the photoresistor controls how long it takes to charge

up the 470

F capacitor (C5). Once the capacitor is charged, current

can flow into the NPN transistor (Q2) and turn on the LED. Pushing the

press switch discharges the capacitor.

CM-125_Manual_031514.qxp_CM-125_Manual_031514 4/2/14 12:20 PM Page 61

Содержание CIRCUIT MAKER Skill Builder 125

Страница 1: ...Inc All rights reserved No part of this book shall be reproduced by 753095 any means electronic photocopying or otherwise without written permission from the publisher CM 125_Manual_031514 qxp_CM 125_...

Страница 2: ...roduct is intended for use by adults and children who have attained sufficient maturity to read and follow directions and warnings Never modify your parts as doing so may disable important safety feat...

Страница 3: ...r 6 2 Snap Wire 6SC02 r 1 100W Resistor 6SCR1 r 3 3 Snap Wire 6SC03 r 1 1KW Resistor 6SCR2 r 1 4 Snap Wire 6SC04 r 1 Photoresistor 6SCRP r 1 5 Snap Wire 6SC05 r 1 Slide Switch 6SCS1 r 1 6 Snap Wire 6...

Страница 4: ...You need a power source to build each circuit This is labeled and requires two 2 1 5V AA batteries not included A large clear plastic base grid is included with this kit to help keep the circuit bloc...

Страница 5: ...nges from nearly infinite in total darkness to about 1 000W when a bright light shines on it Photoresistor RP LAMP CAPACITOR The 470mF capacitor C5 can store electrical pressure voltage for a period o...

Страница 6: ...m the magnet on the motor shell and the shaft spins If the fan is on the motor shaft then its blades will create airflow HLD OUT TRG Space War IC INTEGRATED CIRCUITS ICs IN1 OUT IN2 Alarm IC Connectio...

Страница 7: ...resents how much it resists the electrical pressure voltage and limits the flow of electric current The relationship is Voltage Current x Resistance When the resistance increases less current flows Re...

Страница 8: ...iately and check your wiring if something appears to be getting hot ALWAYS check your wiring before turning on a circuit ALWAYS connect capacitors so that the side gets the higher voltage ALWAYS conne...

Страница 9: ...00W resistor R1 1KW resistor R2 and LED D1 Build Project 11 except initially use the speaker SP in place of the resistor the LED should light Then replace the speaker with the 100W resistor the LED sh...

Страница 10: ...Song 24 31 Transistor Control 25 32 Slow Bright 25 33 Stop Shine 25 34 Murky Motor 25 35 Mixed Up Music 26 36 Blaster Disaster 26 37 Siren Song 26 38 Ambulance Song 26 39 Space Battle 27 40 Bizarre B...

Страница 11: ...Timer Light 47 94 Room Light to Red Light 47 95 Fun with the Alarm IC 48 96 Dancing Motor 48 97 Musical Light 48 98 Music Alarm Combo 49 99 Hit the Target 49 100 Many Missiles 49 101 Sing Fling 50 10...

Страница 12: ...d is free to act as a propeller and fly through the air If speed of rotation is too slow the fan will remain on the motor shaft because it does not have enough lift to propel it 11 Placement Level Num...

Страница 13: ...Place the glow fan on the motor M1 Turn on the slide switch S1 You hear music and alarm sounds and the red LED D1 lights The lamp L1 may light briefly before the red LED turns on Cover the photoresist...

Страница 14: ...ariety of cool sounds stored in it by using just a few extra components In movie studios technicians are paid to insert these sounds at the precise instant a gun is fired Try making your sound occur a...

Страница 15: ...er SP and increased the sound output of the speaker Resistors are used throughout electronics to limit the amount of current that flows Build the circuit shown on the left which is the same as the cir...

Страница 16: ...w the lamp gets dimmer when the motor does not have to spin the fan blade The parts are arranged as a series circuit You can swap the locations of any of the parts without affecting circuit operation...

Страница 17: ...he 100W resistor R1 through the LED D1 light emitting diode and back to the battery The turned on switch completes the circuit The resistor limits the current and prevents damage to the LED NEVER PLAC...

Страница 18: ...a paper clip across the terminals as shown in the picture on the left current flows from the batteries B1 through the 100W resistor R1 through the LED D1 and back to the battery The paper clip comple...

Страница 19: ...touch the fan or motor during operation Place the fan on the motor M1 Press the press switch S2 and listen to the motor Why does the motor make sound If you replace the motor with the 2 5V lamp L1 th...

Страница 20: ...s shorted and motor speed increases Use the circuit built in Project 17 When you close the slide switch S1 current flows from the batteries through the slide switch S1 the lamp L1 motor M1 and back to...

Страница 21: ...ted circuit U1 may start playing one song then stop Each time you press the press switch doorbell button S2 the song will play again and stop Even if you let go of the press switch S2 the integrated c...

Страница 22: ...d start sounding a very loud alarm sound This integrated circuit is designed to sweep through all the frequencies so even hard of hearing people can be warned by the alarm Build the circuit shown on t...

Страница 23: ...of the paper clip at positions X Y or Z and then pressing the press switch S2 If Player 2 places the paper clip at the correct position the sounds played indicates a hit He keeps guessing until he hi...

Страница 24: ...3 tries to find the zone on each turn Each time sounds are made he loses a point Player 2 then sets the 2 3 or 4 side and player 1 starts searching Play continues until one player is at zero points a...

Страница 25: ...Project 26 by connecting points X Y The circuit works the same way but now it sounds like a machine gun Now remove the connection between X Y and then make a connection between T U The circuit works...

Страница 26: ...nsistor Q2 uses the motor current to control the lamp current A current through the motor branch creates a larger current through the lamp branch They combine in the transistor and leave through the 3...

Страница 27: ...siren and music together while the lamp L1 varies in brightness Modify the last circuit by connecting points Y Z with a 2 snap on level 5 The circuit works the same way but now it sounds like a machin...

Страница 28: ...the speaker SP with the LED D1 Make sure you connect the LED with the positive side on A6 not U3 Now you have a silent space battle Build the circuit shown on the left and turn it on The lamp L1 alter...

Страница 29: ...iren is heard and then stops Spin the motor and it will play again Note however that music can be heard faintly in the background of the siren Modify the last circuit by connecting points X Y with the...

Страница 30: ...the slide switch S1 the LED flickers Wait a few seconds and then cover the photoresistor RP and the flicker stops The flicker is controlled by the photoresistor uncover it and the flicker resumes Bui...

Страница 31: ...urns off slowly after you release the switch This delay in turning off the LED is caused by the 470mF capacitor C5 Turn on the switch S1 the LED D1 and lamp L1 are bright This is an unusual circuit wh...

Страница 32: ...gain The 470mF capacitor C5 has charged up and the NPN transistor amplifier Q2 can get no current at its input to turn it on To discharge the capacitor C5 and reset the circuit press and release the s...

Страница 33: ...u have a reflection detector You can also use a white piece of paper instead of a mirror since white surfaces reflect light Build the circuit to the left Place it where there won t be any room light h...

Страница 34: ...r light You can shoot long repeating laser burst or short zaps by tapping the press switch Build the circuit shown on the left which uses the Space War integrated circuit Set the switch on and the spe...

Страница 35: ...from Project 59 Setup Place the spinning rings under a fluorescent light that runs on normal house current Start the disc spinning and release the press switch S2 As the speed changes you will notice...

Страница 36: ...he blue player in column 2 the green player in column 3 and the yellow player in column 4 Spin the wheel by closing the press switch S2 The first single color wedge that the pointer points to is the f...

Страница 37: ...thin and thick marking pens as drawing tools Spin the paper by pressing and holding press switch S2 down Press the marker on the paper to form rings To make spiral drawings release press switch S2 and...

Страница 38: ...t light and compare the sound Modify the last circuit by connecting the photoresistor to points A X The circuit works the same way but now it sounds link an ambulance when enough light reaches the pho...

Страница 39: ...when you turn off the switch Turn on either or both switches and compare the LED brightness This circuit has the 100W and 1KW resistors R1 and R2 arranged in parallel You can see that the smaller 100W...

Страница 40: ...ing how much light shines on the photoresistor The lamp is dark because the photoresistor limits the current through it The NPN transistor uses the small lamp current to create a large current that sp...

Страница 41: ...imes quickly the lamp still goes on and off but the LED stays on Next remove the 470mF capacitor C5 from the circuit the LED goes on and off now Why Pressing the switch quickly simulates a changing vo...

Страница 42: ...o make the lamp L1 brighter Build the circuit shown Notice that when the press switch S2 is pressed the LED D1 goes off This is an example of an inverter circuit or NOT gate Whenever the input is high...

Страница 43: ...if you turn on the slide switch S1 OR press the press switch S2 the LED D1 lights up There is no partially lit state here the diode is either totally on or totally off While this may seem very simple...

Страница 44: ...ding block in computers This circuit is commonly called a NAND gate NAND gates are used in digital logic circuits to perform an inverted logical multiply When one of the inputs is low one of the switc...

Страница 45: ...snaps both to the high bar or positions B in the figure or both to the low bar or positions A in the figure the LED D1 lights up But if you connect the free end of one of the 2 snaps to the high bar...

Страница 46: ...base grid and remove the photoresistor RP Turn the switch on and the LED D1 lights for several seconds then goes out Turn the shaft of the motor and the LED will light again As the motor turns it prod...

Страница 47: ...ingers with some water or saliva and touch them across points A and B several times to hear some space war sounds Push the press switch S2 to hear more sounds at the same time This circuit uses your b...

Страница 48: ...e same way but the fan may fly off after the LED lights Press and release the press switch S2 then turn on the slide switch S1 The LED will light for a while when there is room light on the photoresis...

Страница 49: ...th very faint music in background Thoroughly cover the photoresistor RP with your hand and the sound becomes a siren After a while the sound will stop hold down the press switch S2 and the sound resum...

Страница 50: ...vering the photoresistor RP will stop the music but the siren continues Turn the slide switch S1 on and you hear the sound of a bomb dropping and then exploding The LED D1 lights and then flashes as t...

Страница 51: ...h the press switch S2 and the fan spins while the sound may not be as loud The fan may rise into the air when you release the switch In the circuit the outputs from the alarm U2 and music ICs are conn...

Страница 52: ...h When the fan flies off the current drops and the voltage rises The NPN transistor Q2 used here as a diode and 470mF capacitor C5 are a detector circuit which measures the voltage at the motor Turn o...

Страница 53: ...after you release the press switch The energy stored in the 470mF capacitor C5 keeps the controlling current to the NPN transistor Q2 on even though the press switch was turned off If it is dark the...

Страница 54: ...press switch S2 to connect the 470mF capacitor C5 to the circuit The LED is brighter and stops flashing The signal from the alarm IC U2 to the speaker is a changing voltage which is why the LED was fl...

Страница 55: ...ance The photoresistor and NPN transistor Q2 act like a dimmer switch adjusting the voltage applied to the alarm First place the 470mF capacitor C5 across points A B to discharge it Then build the cir...

Страница 56: ...ether Project 10 Turn it on and wait for any sounds to stop Then spin the motor M1 and the sounds play again Do you know why turning the motor makes the sound play Actually the DC motor is also a DC g...

Страница 57: ...or communication Press the press switch S2 in long and short bursts to make a pattern of light flashes representing the dots and dashes shown in the Morse Code table below You can use Morse Code and t...

Страница 58: ...touch it the LED lights You may have seen such a lamp in the store or already have one in your home Turn the slide switch S1 on and connect points A B with a 2 snap wire The LED D1 will flash and the...

Страница 59: ...k you might even see sparks Did you ever feel a zap when you touch someone wearing a sweater on a dry day These effects are caused by electricity We call this static electricity because the electrical...

Страница 60: ...between the sweaters but it is always extremely small Note This project works best on a cold dry day If the weather is humid the water vapor in the air allows the static electric charge to dissipate...

Страница 61: ...S1 on and turn the shaft of the motor and the lamp will light As the motor turns it produces a voltage This is because there is a magnet and a coil inside the motor When the axis turns the magnetic fi...

Страница 62: ...00 unique projects Contains over 40 parts Sample projects Playback Record Synchronized Flasher Build over 40 unique projects Contains over 17 parts Circuit Maker Basic 40 Model CM 40 Sample projects A...

Страница 63: ...62 Page 34 for Project 59 Page 35 for Project 61 CM 125_Manual_031514 qxp_CM 125_Manual_031514 4 2 14 12 20 PM Page 63...

Страница 64: ...NOT RETURN TO RETAILER Call toll free 800 533 2441 or e mail us at help elenco com Customer Service 150 Carpenter Ave Wheeling IL 60090 U S A Note A complete parts list is on page 2 in this manual CM...

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