RADIO LAB - 3 NON BLONDES

RADIO PRESENTATION

BUILDING AN AM RADIO

EQUIPMENT FOR AERIAL

WIREWIRE

FERRITE RODFERRITE ROD

INSULATING TAPEINSULATING TAPE

CARDCARD

MAKING THE AERIAL

• CENTRE A PIECE OF CARD AROUND THE FERRITE ROD

• WIND THE COPPER WIRE AROUND THE INSULATING TAPE APPROXIMATELY 55 TURNS THE WINDING SHOULD MEASURE 25MM

• SECURE IT WITH INSULATING TAPE ON BOTH ENDS WITH THE WIRE COMING OUT TO THE SIDES

CONSTRUCTION OF RECIEVER CIRCUIT BOARD

CIRCUIT BOARDCIRCUIT BOARD

TRACK SIDE OF CIRCUIT BOARDTRACK SIDE OF CIRCUIT BOARD

TRANSPARENT VIEW OF CIRCUIT BOARD

TRANSPARENT VIEW OF CIRCUIT BOARD

• AERIAL (AERIAL)– BUILT FIRST PRIOR TO CIRCUIT CONSTRUCTION

• HEADPHONES SOCKET (HPHONES)• BATTERY SOCKET (BATT)• 10nF CAPACITOR (C1)• 100nF CAPACITORS (C2,C4)• 47uF CAPACITOR (C5)• TUNER (C6)

EQUIPMENT FOR RECIEVER CIRCUIT BOARD

• MK484 (IC1)• ULTRA MINITURE SLIDE SWITCH (SW1)• 100K RESISTORS – BROWN, BLACK, YELLOW (R1,R3)• 1K RESISTORS – BROWN, BLACK, RED (R2,R4)• 270R RESISTOR – RED, VIOLET, BROWN (R5)• TRANSISTOR BC548B (TR1)• SOLDERING MACHINE• PRINTED CIRCUIT BOARD

EQUIPMENT FOR RECIEVER CIRCUIT BOARD

RESISTORS

BUILDING THE TRANSMISSION CIRCUIT BOARD

AERIALHPHONES BATT

C6

R1

R2R4

R3

C1 C2 C5

R5

TR1

SW1IC1

C4

RECIEVER CIRCUIT BOARD

• SOLDER THE RESISTORS IN PLACE• SOLDER THE SMALLER CAPACITORS IN PLACE• SOLDER THE BC548B INTO THE CIRCUIT• SOLDER THE MK484 RADIO IC IN PLACE• SOLDER THE VARIABLE TUNING CAPACITOR INTO

POSITION


• ATTACH THE CONNECTING WIRES TO THE HEADPHONES SOCKET

• ATTACH THE HEADPHONES SOCKET TO THE CIRCUIT BOARD THEN SOLDER THE WIRES

• SOLDER THE AERIAL IN PLACE (REMOVE ENAMELLED COATING FROM WIRE FIRST)

• ATTACH THE AA BATTERY HOLDER TO THE CIRCUIT BOARD THEN SOLDER THE WIRES


SOLDERING

CONSTRUCTION OF AUDIO AMPLIFIER



• SOLDERING EQUIPMENT SET• PRINTED CIRCUIT BOARD• IC TBA 820M• THREE 1K RESISTORS R1, R2, R3 (BROWN, BLACK,

RED)• TWO 470R RESISTORS R4, R6 (YELLOW, VOILET,

BROWN)• ONE 1R RESISTOR R5 (BROWN, BLACK, GOLD)• TWO 330uF ELECTROLYTIC CAPACITOR C3, C6• ONE 10uF ELECTROLYTIC CAPACITOR C1

EQUIPMENT FOR AUDIO AMPLIFIER

• ONE 150pF CERAMIC CAPACITOR C2• ONE 100nF POLYESTER CAPACITOR C4• ONE 47uF POLYESTER CAPACITOR C5• ONE 8 Ohm SPEAKER• 100mm OF SPEAKER CABLE• ONE SLIDE SWITCH• ONE PP3 BATTERY SNAP• ONE 3.5mm PLUG TO PLUG CABLE• ONE 3.5mm STEREO JACKET SOCKET

EQUIPMENT FOR AUDIO AMPLIFIER

AUDIO AMPLIFIER CIRCUIT BOARD

BATT

SP

EA

KE

R

C1

R6 R4 R3

R1 R2 C2R5

LED

C6

C3

SLIDE SWITCH

C4

C5

STEREO JACKET SOCKET IC TBA 820M

• SOLDER THE RESISTORS IN PLACE• SOLDER THE SMALL CAPACITORS IN PLACE• SOLDER THE ELECTROLYTIC CAPACITORS INTO

POSITION• SOLDER THE LED IN POSITION• SOLDER THE IC SOCKET INTO POSITION• SOLDER THE REMAINING EXTERNAL COMPONENTS

IN PLACE • PLACE THE TBA820M IN THE IC SOCKET• ATTACH THE BATTERY AND TEST THE CIRCUIT


AM TRANSMISSION DEMO

• OSCILLOSCOPE• FUNCTION GENERATOR• WIRE AERIAL• AM RADIO RECEIVER

EQUIPMENT USED FOR THE AM TRANSMISSION DEMO

DEMONSTRATION

• ALL SYSTEMS CONNECTED AND RESULTS OBTAINED

• TWO RADIO STATIONS RECEIVED• POSITIVE AMPLICATION OF THE RECEIVED

SOUND WITHOUT DISTORTION

RESULTS OF THE DEMOINSTEAD OF JUST HEARING ABOUT THE

PROCESS OF DEMODULATION THIS PROCESS GAVE THE GROUP OPPORTUNITY TO VISUALIZE

MODULATION AND DEMODULATION THIS WAS VERY USEFUL IN

CONCRETING THE KNOWLEDGE FOR THE GROUP ABOUT HOW THE

PROCESS WORKS

RADIO LAB VIDEOS

VIDEOS OF DIFFERENT CONSTRUCTION PROCESSES ARE BELOW

• http://www.youtube.com/watch?v=mJR2SIHKsnI

• http://www.youtube.com/watch?v=M_wBGiHm5Qs

• http://www.youtube.com/watch?v=oD8dtW3rCvM

REFERENCES• http://www.youtube.com/watch?v=8IXRK5f747E• http://www.youtube.com/watch?v=MbSCaeJ08WQ• STUDIES IN MEDIA TECHNOLOGY NOTES AND DIAGRAMS

– CIRCUIT CONSTRUCTION FOR AM RADIO– CIRCUIT CONSTRUCTION FOR AUDIO AMPLIFIER– AM TRANSMISSION DEMONSTRATION

POWERPOINT PRESENTATION BYTHREE NON BLONDES

UNIVERSALL CHALLENGED

RADIO LAB - 3 NON BLONDES

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