Blog

26-09-27

Capacitive Switch Circuit for Metal Panels

Understand the electrode, controller, grounding, filtering, and output blocks in a capacitive touch switch circuit for a metal panel.
26-09-27

Indicator Light Leakage Current: Why LEDs Glow When Off

Learn why an industrial LED indicator may glow when off, how PLC leakage and wiring can contribute, and how to diagnose it safely.
26-09-27

Bicolor vs. Tricolor Indicator Lights for Control Panels

Compare bicolor and tricolor indicator lights by machine states, control inputs, panel space, and commissioning checks before selecting a model.
26-09-25

Panel Indicator Light Brightness for Indoor and Outdoor Use

Choose panel indicator light brightness with real ambient-light checks, viewing distance, angle, color, and separate environmental verification.
26-09-23

Metal vs Plastic Indicator Light Housings for Industrial Panels

Compare metal and plastic indicator light housings by installation, environment, sealing, corrosion, chemicals, heat, cost, and maintenance.
26-09-23

Metal Indicator Light vs. Plastic Indicator Light: How to Choose?

When choosing indicator lights for control cabinets, machinery, electrical boxes, or industrial equipment, the housing material may seem like a small detail. However, it can actually affect product durability, appearance, environmental resistance,...
26-09-23

Red, Green, Amber, Blue and White Indicator Light Meanings

Learn the common meanings of red, green, amber, blue, and white industrial indicator lights, plus safer rules for labels, layout, and verification.
26-09-22

12V vs 24V LED Indicator Lights for Control Panels

Choose between 12V and 24V LED indicator lights by measuring the real panel supply and checking waveform, polarity, current, lens, wiring, and environment.
26-09-21

DPDT Key Switch Wiring for Two-Circuit Control

Learn how to specify and verify DPDT key switch wiring for two independent control circuits without guessing terminal functions.
26-09-20

Three-Position Key Switch Contact Logic Explained

Learn how to specify and verify a three-position key switch using contact truth tables, maintained or spring-return actions, key-removal rules, and safe continuity tests.
26-09-19

Two-Position Key Switches: Maintained and Spring-Return Options

A two-position key switch can hold a selected state or return when released. Compare the operating action, key-removal rules, contacts, and panel requirements before ordering.
26-09-16

Mini Toggle Switches: Panel Space, Terminals and Ratings

A mini toggle switch saves panel area, but the design must still accommodate the mounting thread, lever clearance, terminals, wire bend radius,.

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