Top-of-the-Bill Lights Sequencer
Programmable fairy lights
Rope-lights and fairy-lights are starting to appear in supermarkets everywhere. They’re ridiculously cheap, it’s true, but don’t you think they’re a bit short on originality? The project described in this article attempts to put this right, admittedly at greater cost, but what fun to build your very own lights, entrancing and totally unique and what a fine present they’d make, too!
These lights let you produce the most dramatic lighting effects, by altering the countless available movement patterns (variable-speed chaser, random illumination, short or long flashes, etc.), and adjusting the colour (32 levels), saturation (16 levels, including white), and brightness (24 levels) — that means over 10,000 possible colour permutations!
Broadly speaking, the system consists of a master module that drives from 1 to 62 slave modules, identical in all respects (the ‘lights’), with a 9 V PSU, supplying at least 2 A for 30 lights. The power supply is distributed to the master and lights in parallel.
COMPONENTS:
Master module
Resistors
R1 = 1kOhm
R2,R3 = 2.2kOhm
R4,R5 = 100Ohm
R6 = 22kOhm
R7 = 10kOhm
Resistors
R1 = 1kOhm
R2,R3 = 2.2kOhm
R4,R5 = 100Ohm
R6 = 22kOhm
R7 = 10kOhm
Capacitor
C1 = 1000µF 35V, radial, lead pitch 5.08mm (0.2 in.)
C2,C3,C4,C7,C8 = 100nF
C5,C6 = 22pF
C9 = 10µF 35V, radial, lead pitch 5.08mm (0.2 in)
Semiconductors
C1 = 1000µF 35V, radial, lead pitch 5.08mm (0.2 in.)
C2,C3,C4,C7,C8 = 100nF
C5,C6 = 22pF
C9 = 10µF 35V, radial, lead pitch 5.08mm (0.2 in)
Semiconductors
D1, D2 = LED, 3mm (see text)
D3, D4 = 1N4148
IC1 = 7805
IC2 = 24FC1025-I/P (Microchip) (see text)
IC3 = PIC18F2550 (Microchip)
D3, D4 = 1N4148
IC1 = 7805
IC2 = 24FC1025-I/P (Microchip) (see text)
IC3 = PIC18F2550 (Microchip)
Miscellaneous
K1 = 2-way terminal block, lead pitch 5.08mm (0.2 in.)
K2, K3 = 5-way SIL pinheader, lead pitch 5.08mm (0.2 in.)
K4, K5 = 2-way terminal block, lead pitch 5.08mm (0.2 in.)
K6 = USB-B socket for IC (see text)
K7 = 4-way SIL pinheader, lead pitch 5.08mm (0.2 in.)
S1 = pushbutton, 1 make contact (see text)
X1 = 20MHz quartz crystal, HC49/U case
PCB, ref. 090125-1 [1]
K1 = 2-way terminal block, lead pitch 5.08mm (0.2 in.)
K2, K3 = 5-way SIL pinheader, lead pitch 5.08mm (0.2 in.)
K4, K5 = 2-way terminal block, lead pitch 5.08mm (0.2 in.)
K6 = USB-B socket for IC (see text)
K7 = 4-way SIL pinheader, lead pitch 5.08mm (0.2 in.)
S1 = pushbutton, 1 make contact (see text)
X1 = 20MHz quartz crystal, HC49/U case
PCB, ref. 090125-1 [1]
Miniature lamp (each)
Resistors (SMD 1206)
R1 = 2.2kOhm
R2 = 100Ohm
R3 = 4.7kOhm
R4, R5 = 47Ohm
R6 = 47kOhm
Capacitors
C1 = 220µF 25V radial, lead pitch 2.54mm (0.1 in.)
C2 = 100nF (SMD 1206)
Semiconductors
D1 = LED, RGB, common anode
IC1 = TS78L05CX, SOT-23 case
IC2 = PIC12F508-I/SN (Microchip, SOIC 150)
T1 = BC857, SOT-23 case
T2 = BC847, SOT-23 case
Miscellaneous
PCB, ref. 090125-2 [1]
R1 = 2.2kOhm
R2 = 100Ohm
R3 = 4.7kOhm
R4, R5 = 47Ohm
R6 = 47kOhm
Capacitors
C1 = 220µF 25V radial, lead pitch 2.54mm (0.1 in.)
C2 = 100nF (SMD 1206)
Semiconductors
D1 = LED, RGB, common anode
IC1 = TS78L05CX, SOT-23 case
IC2 = PIC12F508-I/SN (Microchip, SOIC 150)
T1 = BC857, SOT-23 case
T2 = BC847, SOT-23 case
Miscellaneous
PCB, ref. 090125-2 [1]
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