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DMX512 Control Interface

With visual configuration using a Cypress PSoC microcontroller

DMX512 Control Interface
DMX512 Control Interface
The DMX512 protocol is a professional standard for controlling lighting equipment. However, truly general-purpose DMX driver interfaces are far from cheap. This circuit provides a wide variety of outputs and is based on a PSoC device that supports visual configuration. This makes it very easy to generate the desired setup.Regardless of whether you’re putting on a private party or organising a major festive event, you need the right lighting as well as the right sound to set the right mood.

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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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PCB

Extra info / Update

* Versatile output configuration
* Visual microcontroller configuration
* Free development environment
* DMX512 input
* DMX512 output (feedthrough or repeater)
* DMX status LED
* 4-section DIP switch for configuration settings
* Temperature sensor for fan control
* Supply voltage range 13–18 V (DC) or 9–12 V (AC)

Outputs:
* 1 fan (motor) drive
* 1 DC motor drive with bidirectional rotation
* 5 configurable outputs (with separate status LED for each channel):
Open collector (with pull-up to 5 V or 10 V)
- switch, pulse or PWM mode

Hi-wide switch (10 V)
- switch, pulse, PWM, or analogue (0–10 V) mode
* 6 floating switch outputs (solid-state relay)

Component list

Resistors
(all SMD 0805)
R1,R9,R10 = 240Ohm
R2,R6,R19,R26,R33,R40,R47,R48,R51 = 470Ohm
R3,R18,R25,R32,R39,R46 = 10kOhm
R7 = 910Ohm
R8 = PTC LT731K0JTG (Tyco Electronics)
R11,R12 = 820Ohm
R13,R17,R20,R24,R27,R31,R34,R38,R41,R45 = 0Ohm (see text)
R14,R15,R16,R21,R22,R23,R28,R29,R30,R35,R36,R37,R42,R43,R44 = 0Ohm (see text)
R49,R50 = 1.5kOhm
R52,R53,R54,R55,R56,R57,R58 = 1kOhm
R59,R60 = 120Ohm
Capacitors
C1,C2,C5,C6,C7,C8,C9 = 1µF 25V (1206)
C3 = 10µF 16V (4x5.8mm)
C4,C14 = 100µF /63V (10x10mm)
C10,C11,C12,C13 = 100nF (0805)
Semiconductors
D1,D2 = BAS285-GS18
D3,D4,D5 = BAS40-04
D6,D7,D8,D9,D10,D11,D12 = LED (0805)
B1 = DF02S
T1,T2,T3,T4,T5,T8 = MUN2211LT1G
T6,T7,T10 = BC817-40
IC1,IC2 = LM317EMP
IC3,IC4 = LTC485S
IC5 = CY8CLED08-48PVXI
IC6,IC7,IC8,IC9,IC10,IC11,IC12 = ITS4141N
IC13,IC14,IC15 = ASSR-4128-002
Miscellaneous
S1 = 4-way DIP switch
K1 = 5-pin pinheader , lead pitch 0.1 in. (2.54mm)
K2,K3,K4,K5,K6,K7,K8,K9 = 2-way PCB terminal block, lead pitch 0.2 in. (5.08 mm)
K10,K11,K12,K13,K14,K15 = 2-pin pinheader, lead pitch 0.1 in. (2.54mm)
K16,K17 = 3-pin pinheader, lead pitch 0.1 in. (2.54mm)
PCB # 081130-1

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