TA 2003 FM Radio Receiver

by

[ad_1]

Remark errors or corrections discovered for this circuit, and get the possibility to win huge!

Right here is an easy FM Radio Receiver Utilizing single chip TA 2003. This IC have inbuilt RF Amplifier, native oscillator, a mixer, FM detector and AF preamplifier. Solely few passive elements like ceramic capacitors, X1, X2 each are 10.7MHz 3-pin, 2-pin, do-it-yourself inductors like L1, L2 and L3,an electrolytic capacitor 2.2uF/25V are used on this circuit. 10.7 MHz IFT coil just isn’t used right here so there isn’t a must tune of coils.

Components Record

Semiconductors
IC1: TA 2003

Ceramic capacitors
C1: 47pF
C2: 103
C5: 0.01uF
VC1a, b: 20-30 pF FM gang capacitor

Electrolytic Capacitor
C3:10uF/25V
C4(220uF/25V)

Ceramic Filter
2-pin and 3pin 10.7 MHz ceramic filters

Miscellaneous
2-pin connectors, 2*1.5 volts battery case a battery, 75cm lengthy wire, 22 SWG copper wire, 16pin IC socket and vero board 5cm* 7cm e.t.c.

Circuit Description

Pin 1 of IC1 TA 2003 is related to antenna (75cm lengthy wire) by means of C1. A capacitor C3 is c. Pin 2, pin 9 are grounded.

A crystal 10.7 MHz 3-pin is related to pin 3 and eight (color tag is confronted in the direction of pin 3) and center pin is related to+3 Vcc.

Pin 13 is related to coil L2 and VC1b in parallel to one another . Different one finish is related to +3 Vcc. Pin 6 and pin 14 are related to +3Volts. A coil L1 and VC1b are related to one another in parallel. One finish of L1 and VC1a is related to pin 15 and others finish  is related to +3Vcc. Pin2, 9 are grounded. 

Ceramic filter X2 (10.7 MHz 2-pin) is related to +3 Vcc and pin 10. Pin 11 is an output pin and is related to AF amplifier by means of an electrolytic capacitor 10uF/25V. A capacitor C4 is an electrolytic capacitor is of (220uF/25V) related to damaging terminal and +3Vcc which can filter a DC +3Vcc.voltage. And capacitor C2 will filters a noise symbolize at AF output. And an AF output is taken output from pin 11 of IC1 by means of an electrolytic capacitor C3 (10uF/25V).

Development

A veroboard of 5cmX7cm is appropriate to construct your prototype. A PCB format is given within the article is appropriate to construct your prototype. 

Now you’ll make coil L1, L2. For a coil L1 a 22SWG wire is wound on 5mm diameter with 3 flip’s air core and coil L2 is 22 SWG wire 5mm diameter wound on 4 turns of air core.

Now insert an 16-pins IC socket on a center of a vero board and solder it. Now take an IC1 TA 2003 and place it on an 8-pin IC socket. Subsequent insert a coil L1, L2 as given in a diagram and in addition X1(3-pins 10.7MHz ceramic filter), and X2 (2-pin 10.7MHz ceramic filter). Chances are you’ll place 2-pin connector for AF output and in addition for +3 V and damaging terminal of+3V battery.

Calibration and Adjustment

For a calibration you want an AF amplifier which is related to output pin 11 of IC1. Take a 2*1.5 Volts battery and join each 1*2 V battery in sequence and  hook up with a +3V terminal and floor)

Now flip a quantity of AF amplifier. You’ll hear a snowy as on TV set. Subsequent gently modify coil L1and L2 by pulling them aside Chances are you’ll catch a few of FM stations. Join VC1a and VC2b gang variable capacitor in parallel with L1, L2. Tune a VC1a, b to a strongest station. As quickly as you’ll hear a transparent and loud sound, you could tune to totally different stations.

[ad_2]

Leave a comment