Andrei Lerca

Andrei Lerca

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Andrei Lerca
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Picture of Reflow Soldering Hotplate

Picture of Reflow Soldering Hotplate

Electronic Magnetic floater

Electronic Magnetic floater

Early concept for a fully symmetric belt-driven extruder carriage for upgrading Prusa Mendel. Belt-driven means there's no stepper motor on the X-carriage, so it can be much lighter and move much faster. It has two X-belts that are controlled by one stepper on each side. If both belts move in the same direction, the X-carriage moves in that direction too. If both belts move in opposite directions, the extruder moves but the X-carriage stands still. x_motion = (stepper1 + stepper2) &#...

Early concept for a fully symmetric belt-driven extruder carriage for upgrading Prusa Mendel. Belt-driven means there's no stepper motor on the X

Poor Man's CNC Edge Finder

Aluminum foil tape offers a very simple, precise and cheap way to zero almost any workpiece.Things you need: Aluminum foil tape - it can be found at most hardware.

End Mills

…we build also for you the bridge to an attractive Tool and Die market and guarantee Swiss Quality at affordable Asian prices.

Petit Studio: Petitduino, another breadboard friendly Arduino

Petit Studio: Petitduino, another breadboard friendly Arduino

How to work out angles and sides of triangles, Cosine and Sine Rules, Pythagoras, Scalene, obtuse, equilateral and similar triangles. #math #trigonometry #juniorhigh #education #STEM

The triangle is the simplest polygon This article covers types of triangles, Pythagoras's theorem, cosine rule, sine rule, various ways of calculating the area of a triangle and basic trigonometry

5 websites that will be amazing for your math teaching

Sites that I can't do without as a math teacher (and what's so special about each one!) Links to virtual manipulatives, discovery-based less.

simple 3 phase arduino energy meter

A detailed guide to building a 3 phase energy meter using an Arduino and current transformers to measure current, power and kilowatt hours consumed.

simple 3 phase arduino energy meter

A detailed guide to building a 3 phase energy meter using an Arduino and current transformers to measure current, power and kilowatt hours consumed.

simple 3 phase arduino energy meter

A detailed guide to building a 3 phase energy meter using an Arduino and current transformers to measure current, power and kilowatt hours consumed.