• on Audio/Video/Photography
  • Published in issue 7/2012 on page 58
About the article

Mini-Mute

Kill noisy TV commercials with one stroke

Mini-Mute

You must know the feeling: you’re watching a great movie and all of a sudden a commercial comes blasting into the room. Your instinctive response is to turn down the sound or press the mute button – but where’s the zapper?

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Products
Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor Members can exclusively download these files for free as part of their Membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service. Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.

Components
Download the BOM list
The BOM (Bill of Materials) is the technically exhaustive listing of parts and other hardware items used to produce the working and tested prototype of any Elektor Labs project. The BOM file contains deeper information than the Component List published for the same project in Elektor Magazine. If required the BOM gets updated directly by our lab engineers. As a reader, you can download the list here.
Want to learn more about our BOM list? Read the BOM list article for extra information.

Resistors
R1,R2 = 10kOhm
R3 = 1MOhm
R4 = 1kOhm
R5 = 470Ohm
R6 = 22Ohm 0.25W
R7 = 330Ohm 0.25W
Capacitors
(SMD0805)
C1,C2 = 100nF
Semiconductors
D1 = 3V 0.375W zener diode (SOD123F)
D2 = LED, low current, red, 3mm
D3 = IR-LED, 5mm (e.g. Vishay TSUS5202)
T1 = BC847 (SOT23)
IC1 = PIC12F1822-I/SN (SOIC8)
IR receiver module, 36kHz (e.g. TSOP34836)
Miscellaneous
K1,K2,S1 = 2-pin pinheader, pitch 0.1 in. (2.5mm)
K3 = 3- pin pinheader, pitch 0.1 in. (2.5mm)
K4 = 6- pin pinheader, pitch 0.1 in. (2.5mm)
Piezo buzzer (e.g. Kingstate KPEG165)
Pushbutton with make contact, panel mount
2 AA or AAA batteries with holder, or 3-V button cell
PCB # 120277-1

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