Industrial-strength LVI

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Industrial-strength LVI

Post#1 » Sun Nov 10, 2019 8:13 pm

A while ago, my DIY Line Voltage Inducer (LVI) for my DreamPi broke yet again, and instead of digging out the soldering iron and repairing it for the upteenth time, I decided to overhaul the design. (The ends of the fragile RJ11 cord pins must have gotten strained, and the solder broke loose on the RJ11 pins. Tiny, stripped 24 AWG gauge wire inside RJ11 cable is a complete pain to deal with and to solder down tightly, especially since it's tiny stranded wire, not solid-core.)


My original LVI

Instead, I replaced it with a DIY, industrial-strength, solderless LVI, which I'm showing off today. For those who want to create their own DIY LVI, who don't have the ability to solder, or who just struggle dealing with stripped RJ11 wire, this is probably the best design out there. And it fits into a fancy case to boot!

It uses 2 RJ11 wall plates (which attach the RJ11 pins to user-friendly spade terminals and screws on its keystone), solid-core copper jumper wires stripped and crimped with spade terminals, and a breadboard for the LVI circuity itself. Everything fits into a small metal tin, which can easily be found for cheap at craft stores. Holes were Dremeled out to fit the RJ11 wall plate keystones, wall plate screw holes were drilled out to the top/bottom, and the plates were tightened down to the top/bottom of the tin with short screws and nuts/washers. The black, green, and yellow pins between the RJ11 wall plates were just jumped (direct connection), while the red pin was jumped over to a small breadboard. That breadboard has the LVI circuity for applying the voltage. Total cost was ~<$15 USD.

(That huge breadboard is currently my only one, and serves as a placeholder, with a totally unrelated RGB prototype circuit currently stuffed on it. I need to order one of those mini 170-tie point breadboards online to finish it ;) . Pretend it's one of those mini breadboards and that the whole thing is enclosed inside the metal case, which the final design would indeed do.)
Mini.jpg (10.74 KiB) Viewed 141 times





I'm also curious to see other member's LVIs :).
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