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Alternative to Soldering 0402 SMD LEDs

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Published on Aug 30, 2014

This video provides an alternative method to soldering or wiring low voltage, small electronic parts like 0603 or 0402 LEDs. Conductive glues or adhesives (called liquid solder by old-timers) can be used instead of heat soldering. Some criticize the use of conductive glue as opposed to soldering as if their use is an immature approach or only used when soldering skills are lacking. However, conductive glues are tools of sort, and like all tools, conductive glues have their own place.
Conductive glues are an acceptable method to make conductive connections in situations where heat is not appreciated nor tolerable such as near plastics, detriment to wire sheathing and/or other heat sensitive materials.
The manufacture of conductive adhesives is a billion dollar industry, involving numerous chemically based conductive compounds. Some of the most highly conductive compounds are extremely expensive such as aluminum epoxy, nickel epoxy, silver epoxy, up to gold epoxy.
The conductive glue used in this video [Wire Glue] is a low-cost, water based graphite compound but still performs well in general low voltage application. Yes, Wire Glue, like all conductive glues, has some resistance but that resistance was unnoticed. In this project, wire glued LEDs achieved the CORRECT and desired forward current as related to the other Ohm's law factors, power supply and forward voltage (tested with a Fluke 115 RMS multimeter).

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