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Home › Magazines › 2008 › November › Motorised Volume Pot

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Motorised Volume Pot

High-end with remote control

Published in issue 383, November 2008

Motorised Volume Pot
Many audio enthusiasts still prefer a good potentiometer for adjusting the audio volume. It would be even nicer if this potentiometer could also be controlled remotely. This is possible with a high-quality motorised potentiometer from Alps and a handful of electronics, as is described here.

Components

Free downloads

Resistors
R1,R3 = 10kohm
R2 = 82ohm
R4 = 390ohm
P1 = Alps 10kohm logarithmic stereo motor potentiometer (e.g. RK27112MC)
Capacitors
C1,C7,C8 = 100nF ceramic, lead pitch 5mm
C3 = 100pF, lead pitch 5mm
C4,C5 = 22pF, lead pitch 5mm
C9 = 220uF 25 V radial, lead pitch 2.5mm
C10-C13 = 22nF ceramic, lead pitch 5mm
Semiconductors
D1 = 2-pin dual-LED
IC1 = ATMEGA8-16PU, programmed, Elektor SHOP # 071135-41
IC2 = SFH5110-36 (possibly via 3-way SIL pinheader)
IC3 = 7805
Miscellaneous
B1 = B80C1500 (80Vpiv, 1.5A) (round case)
K1,K6,K9 = 2-way SIL pinheader
K2,K7,K8 = 4- way SIL pinheader
K3 = 7- way SIL pinheader
K4,K5 = 2-way PCB screw terminal block, lead pitch 5mm
X1 = 4MHz quartz crystal
PCB, ref. 071135-1 from www.thepcbshop.com
Controller software: free download 071135-11.zip

Click below to download a PDF copy of this article from Elektor magazine.

 

Downloads 
Article PDF
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PCB PDF
Free download
 

Order this magazine 
Magazine November 2008
uk383 (USD 6.30)
 

Order from Elektor 
Programmed controller ATmega8-16PU
071135-41 (USD 11.80)
PCB, bare
071135-1
 

Free downloads 

Software

Free download
Please note. In view of the complexity of international markets, Elektor cannot guarantee the availability of components for this project.

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