5 band graphic equalizer using a single IC

This circuit uses a single chip, IC BA3812L for realizing a 5 band graphic equalizer for use in hi-fi audio systems.The BA3812L is a five-point graphic equalizer that has all the required functions integrated onto one IC. The IC is comprised of the five tone control circuits and input and output buffer amplifiers. The BA3812L features low distortion, low noise, and wide dynamic range, and is an ideal choice for Hi-Fi stereo applica-tions. It also has a wide operating voltage range (3.5V to 16V), which means that it can be adapted for use with most types of stereo equipment.

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TDA7012T Single chip FM received

FM Radio Receiver IC TDA 7012T is very simple, but Radio This FM receiver has good sensitivity and selectivity. Single Chip TDA 7012T FM Receifer is to build an FM receiver requires a few additional components.


Feature contained in FM receiver IC TDA 7012T is quite tempting to an FM receiver. Among features an FM receiver TDA 7012T is a low-voltage applications micro affability arrangement (MTS), Frequency Loked Loop (FLL) to 76 KHz range and selectivity of FM receiver with RC Filter. In an article by FM Radio Receiver IC TDA 7012T can be seen in the FM receiver circuit which can be made​​.

TDA7012T- Mini FM received Schematic

Part List

R1 = 8kΩ2

R2 = 10kΩ

R3 = 390Ω

C1,C3 = 10nF

C2,C6,C9,C16 = 100nF

C4 = 33pF

C5 = 25pF trimmer

C7,C10 = 1nF5

C8 = 820pF C11 = 1nF

C12 = 68pF

C13 = 220pF

C14 = 47μF 10V

C15 = 3nF3

L1 = 36nH

L2 = 1μH,

IC1 = TDA7021T

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