Digital Volume Control circuits


This series is the volume of the digital amplifier that is used on or tone control. This series using ic type DS1669 Digital Pot IC specifically for this match volume.rangkaian settings used at the middle-class amplifier that small powerless under 50 watts.

volum11

components: C1 = 0.1uf Ceramic, IC = IC DS1669 Digital Pot, S1 / S2 = digital swicth

Or you can use the series to this one:

volum2

The Work: The digital volume control IC uses 9. Required to operate the series voltage regulator is 12 Volt. IC1 (555) is very good to work as a flip-flop. Frequensi or period can be determined with memilh value of resistor R44, R45 is combined with a capacitor C6. In this series has a 0.3 second period.

IC2 is used to increase or decrease the calculation. In the series of this mode is used to raise up and down mode is used to decrease the volume. While IC4 and IC3 has a 16-channel, analogue multiplexers, while working as an analog switch. IC3 is used as in the series of level indicator while IC4 is used as potensiometer.

After the next power in the on-kan, and the switch S1 is pressed to reset. When the switch S2 is pressed, the IC2 and the balance in the form of output ditanggapi legs B, C, and D in CMOS IC2. Output B, C and D control line inputs IC2 and IC3, and the chosen one, the output 16-channel, by turning on the analogue.

In this series, IC4 is used as potensiometer that is connected to the resistor 15 (R9 to R23) each of the 16 input pins and resistor / capacitor combination with C2, C3 and R7 to the output. Switch S2 is used to raise and switch S3 is used to decrease the volume.

Electrolyte capacitor of 1uF (C4) is used utnuk prevent the occurrence of noise. While the R8 and the resistor R6 is used to prevent tension on the half-supply voltage in order to avoid distortion of the audio signal coming from the preamplifier. Meanwhile, capacitor C2, C3 and resistor R7 is provided to filter the audio. Happy work, hopefully successfully.

COMPONENT LIST :

R1, 2, 3, 4
: 560R
R16
: 1,5K
R45
: 150K
R5
: 680R
R17
: 3,3K
C1
: 0,01uF
R6, 8
: 100K
R18
: 5,6K
C2, 3
: 100nF
R7
: 1M
R19
: 8,2K
C4
: 1uF/50V
R9
: 10R
R20
: 15K
C5
: 100nF
R10
: 12R
R21
: 33K
IC1
: 555
R11
: 42R
R22
: 56K
IC2
: 74193
R12
: 100R
R23
: 1,5M
IC3
: CD4067
R13
: 220R
R24…R39
: 560R
IC4
: CD4067
R14
: 470R
R40..R43
: 4,7K
IC5
: 7805
R15
: 820R
R44
: 330K
IC6 N1-N4)
: 7407