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A simple tachometer equipped with a contactless reflection sensor built on the basis of a transmitting diode and phototransistor operating in the infrared band. The device allows you to easily measure the speed of the rotated objects, eg wheels or drive shafts. It is enough to apply a white point to the object to be measured, so that the diode light reflected from it falls on the phototransistor.
Project AVT 1870 EP 08/15
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A single cell of a lithium-polymer battery, Sparkfun
No product available!
No product available!
Battery: Li-Po; 3.7V; 400mAh; Outputs: wires with 2-pin JST-PH connector; 5 x 25 x 35mm. PRT-10718
No product available!
No product available!
No product available!
A surface speaker with an impedance of 8 Ω and a power of 1 W. It is made of a voice coil attached to a pad that conducts vibrations. SparkFun COM-10917
No product available!
COM-11556 - Thermochromatic Pigment - Sapphire Blue (20g)
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COM-11557 - Thermochromatic Pigment - Bright Yellow (20g)
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No product available!
No product available!
No product available!
No product available!
Bare Conductive’s Electric Paint is just like any other water-based paint… except that it’s electrically conductive! This means that you can actually paint wires onto things like models, clothes, furniture, walls, almost anything you can think of. COM-11521
No product available!
No product available!
No product available!
COM-10963 - EasyVR Shield - Voice recognition module, SparkFun
No product available!
PCB and programmed system for the rev counter 0-29999 rpm. AVT1870 A +