Surround Light
The analogue approach
The operating principle consists of measuring the average colour of an image and using colour LEDs to emit the same colour in order to ‘paint’ an im
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Materials
Gerber file
CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD 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.
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Component list
R1-R6,R14,R15,R20,R39,R52,R61,R62,R65,R66,R67 = 10kΩ (SMD 1206)
R7,R8,R9,R13,R17,R18,R19,R31,R49,R50,R51,R57 = 3kΩ9 (SMD 1206)
R10,R11,R12 = 68kΩ (SMD 1206)
R16,R53,R56 = 1kΩ (SMD 1206)
R21,R32,R43,R45,R47,R54,R60 = 4kΩ7 (SMD 1206)
R22,R23,R24,R36,R40,R41,R42,R58 = 1kΩ (SMD 1206)
R25,R27,R29 = 6Ω8 (SMD 2512)
R26,R28,R30,R33,R44,R46 = 1Ω8 (0207)
R34 = 220kΩ(SMD 1206)
R35 = 1MΩ (SMD 1206)
R37,R59 = 680Ω (SMD 1206)
R38 = 47kΩ (SMD 1206)
R63 = 2kΩ2 (SMD 1206)
R64 = 6kΩ8 (SMD 1206)
R68 = 1Ω (SMD 1206)
R48,R55,R69 = 75Ω (SMD 1206)
P1 = 10kΩ
P2 = 1kΩ
Capacitors
C1-C4,C7-C12,C14,C15 = 100nF (SMD 1206)
C22 = 10nF (SMD 1206)
C21,C23 = 1nF (SMD 1206)
C16 = 470pF (SMD 1206)
C5,C13,C17-C20 = 100μF 25V
C6 = 10μF 25 V
Inductors
L1 = 47μH (Würth 12x12)
L2-L5 = choke, 91 Ω @ 100 MHz (SMD 1808)
Semiconductors
D1-D8,D11-D14,D21,D22 = LL4148 (SMD SOD-80)
D9,D10,D16,D20 = BZX84C5V6 (SMD SOT-23)
D17,D18,D19 = LED, 3mm, red
D23= RS3K (SMD SMC)
D15,D24 = 30BQ040 (SMD SMC)
T1,T2,T3 = MJD44H11 (SMD DPAK-N)
T4,T5,T6 = FDS6630 (SMD SO-8)
T7-T12,T14 = BC817 SMD SOT-23)
T13 = BC807 (SMD SOT-23)
IC1,IC2 = LM324 (SMD SO14)
IC3 = LM2592 (SMD SOT-263)
D25 = Luxeon LED, red (LXK2-PD12-R00)
D26 = Luxeon LED, green (LXK2-PM14-U00)
D27 = Luxeon LED, blue (LXK2-PB14-N00)
Miscellaneous
S1 = single-pole on/off switch (Farnell # 9575502)
S2 = 4-way DIP switch
K1 = 4-way SIL pinheader
K2,K3 = 5-way DIN socket
K4 = DC supply socket, PCB mount
K5 = VGA socket, PCB mount
K6 = SCART socket, PCB mount
F1 = fuse, 1A slow, with PCB mount holder
Enclosure, e.g. Vero # 16-3638089
PCBs # 070491-1 and 070491-2, see Elektor Shop section or www.elektor.com
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