Active Loudspeaker System (1)
for multimedia applications
Materials
Gerber file
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Component list
R1 = 1M?
R2,R15,R18 = 470?
R3 = 6k?8
R4 = 4k?7
R5 = 0?
R6 = 7k?68
R7 = 9k?53
R8 = 8k?25
R9 = open *
R10 = 4k?99
R11 = 9k?76
R12 = 12k?7
R13,R14,R16,R17 = 2k?00
R19 = 10k?
R20,R21 = 15k?
R22,R23 = 0?1 5W
R24 = 2k?7
P1,P2,P3 = 10k? preset
Capacitors:
C1,C4,C16 = 2µF2 MKT, lead pitch 5 or 7.5mm
C2 = 1nF, lead pitch 5mm
C3 = 120nF, lead pitch 5mm
C5 = open *
C6 = 8nF2, lead pitch 5mm
C7 = 3nF9, lead pitch 5mm
C8,C15,C18 = 3nF3, lead pitch 5mm
C9 = wire link *
C10,C11,C12 = 4nF7, lead pitch 5 mm
C13,C19 = 10µF 63V radial
C14,C17 = 470nF
C20 = 47µF 25V radial
C21,C23 = 100nF, lead pitch 5mm
C22 = 4µF7 63V radial
C24 = 4700µF 25V radial, lead pitch 7.5mm, diameter 17mm max.
Semiconductors:
D1,D2 = 1N4148
D3 = LED, green, high-efficiency
IC1 = TS924IN (ST, from Farnell)
IC2 = TDA7374B (ST, from C-I Electronics, www.dil.nl
IC3 = 7808
Miscellaneous:
JP1 = 2-way pinheader w. jumper
LS1 = SC13 8? Visaton (Conrad Electronics)
LS2 = SC10N 8? Visaton (Conrad Electronics)
Heatsink for IC2: 3 K/W
Wood: 12 mm MDF — see Figure 4
Wadding material (BAF)
PCB, order code 020054-1
* see text and Table 1
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