About the article

Compact USB to DMX Converter

With full electrical isolation

Compact USB to DMX Converter
Properly isolated USB to DMX512 converters are high up there in the professional price realms i.e. very expensive, which led me to design a DIY alternative, aiming to make it cheaper than equally specified, isolated converters.
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Component list

Component List


All 5%, 0.1W, 150V.

R1,R2 = 22Ω

R3,R4 = 270Ω

R5 = 120Ω

R6 = 10kΩ

R7 = 330Ω

R8 = 100kΩ



C1,C2 = 47pF 50V, C0G/NP0, 0805

C3 = 47µF 25V, 0.36Ω ESR, SMD aluminum electrolytic

C4, C5,C6,C7,C8 = 100nF 50V, X7R, 0805



LED1 = green, 50mcd, 2.1V @20mA

LED2 = yellow, 50mcd, 2V @20mA

LED3 = green, 3mm

IC1 = FT232RL

IC2 = WPMIB9200501S





K1 = USB-B Connector

K2 = NC3FAAH2, 3-way XLR socket, gold-plated contacts, AA Series

ABS enclosure, polystyrene, 40 x 85 x 81mm, IP40, e.g. Bopla type 26085000

M3 x 5mm Phillips pan head screws

M3 ring

PCB, Elektor Store no. 160493-1 rev. 1

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