• on Audio/Video/Photography
  • Published in issue 7/2004 on page 0
About the article

TV Commercials Killer

Pause recording during ad breaks

Stop those annoying advertisement breaks spoiling your recordings with this ingenious circuit. Its basic ingredients are an overclocked Scenix SX28 microcontroller running some clever software, fast static RAM and a two-way ‘code-learning’ infrared remote control that obviates surgery to the family’s precious VCR. Curious about the operation? Read on… Anyone who has ever recorded a programme from a commercial broadcaster onto video or DVD will know the problem: either you have to stand over the recorder and press the ‘STOP’ button when the advertisements start (and then forget to press ‘RECORD’ when the programme continues), or you have to subsequently go through and edit out the breaks; or, of course, you can just put up with them. Alternatively, you can in some cases pay for services that are free of advertising.
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(all metal film 0.25 W, 5 %)
R1 = 47Ohm
R2 = 8kOhm 2
R3 = 220Ohm
R4,R6 = 100Ohm
R5 = 3kOhm 6
R7 = not fitted
R8 = 120Ohm
R9,R15 = 10kOhm
R10 = 3kOhm 9
R11 = 75Ohm
R12 = 620Ohm
R13 = 680kOhm
R14 = 3kOhm 3
R16 = 120kOhm
R17,R22 = 220kOhm
R18,R19 = 1kOhm 5
R20 = 27Ohm
R21 = 1kOhm 2
C1 = 10nF 63V NP0
C2-C4,C7,C8,C11,C14-C16 = 100nF 63V X7R
C5= 220pF 63V NP0
C6 = 56pF 63V NP0
C9 = 100pF 63V NP0
C10= 510pF 63V NP0
C12,C13,C18 = 220nF 63V X7R
C17 = 33pF 63V NP0
C19-C23 = 10µF 16V E2.5-5
C24 = not fitted
C25 =100µF 16V E2.5-6
D1,D2 = 1N4148
D3 = LED, 5mm, red, low current
D4 = LED, 5mm, green, low current
D5 = SFH203FA (Infineon)
T1,T3,T4 = BC547B
T2 = BC557B
T5 = BC337/40
LD1 = LD271-H (Infineon/Osram) *
IC1 = ICS502M (ICS)
IC2 = ADC1175CIJM (National)
IC3,IC8 = 74AC4040
IC4 = SX28AC/DP (Scenix, now Ubicom)*
IC5 = 61298P6 SOJ28-3 (IDT)
IC6 = NM24C08N08E (Fairchild)
IC7 = 74HCT00
IC9 = LM1881N08E (National)
IC10 = 78L05
X1 = 20MHz quartz crystal (HC49U-H)
L1 = 4µH7
K1 = Cinch socket (Lumberg WBTOR 1)
K2 = mains adaptpr socket 2mm (Lumberg NEB/J 21R)
K3 = miniature jack socket (Lumberg KLBR2)
S1 = pushbutton with make contactt (Schurter 1301.9502, no cap)
Mains adaptor, 7.5-9 VDC, 300 mA
Enclosure (e.g., Woehr Bernic Desk Top Enclosure 2011S, www.woehrgmbh.de)
IR transmitter head
Jack plug (Lumberg KLS2SL)
IR sender LD271-H (Infineon), see above
Suggested supplier
Ing. Büro Schulze
Obere Ringstrasse 7
D-79859 Schluchsee
Tel./fax: +49 7656 9173
Email Mschulze99@web.de
* hex code file 040051-11, Free Download
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