Velleman Kits & Projects

A thermistor is a type of resistor where the resistance is dependent on temperature, more so than in standard resistors.

The TP4056 based VMA321 module is a complete constant-current/constant-voltage linear charger for single cell lithium-ion batteries.

This current sensor module guarantees precise measuring for commercial systems. Especially designed for easy installation. Can be used for motor control, load detection, overcurrent.

The TCS230 senses color light with the help of an 8 x 8 array of photodiodes. Then using a Current-to-Frequency Converter the readings from the photodiodes are converted into a square wave with a frequency directly proportional to the light intensity. Finally, using the Arduino Board we can read the square wave output and get the results for the color.

A simple micro switch ideal for Robotic or 3D printer applications. A handy sensor for mechanical movement.

Use this analogue UV sensor module extends to extend your light sensing spectrum. Its UV photodiode will detect light ranging from 240-370 nm (thus including UVB and most of the UVA spectrum). As the photodiode has a very small nano-ampere signal level, the device contains an opamp to amplify this signal.

Add some security to your development board applications with this fingerprint scanner.

This module is an inexpensive solution for an obstacle avoidance sensor, perfect for robotic projects and very easy to interface directly with Arduino® and compatible boards. The module has two potentiometers, one to control frequency and one to control the intensity.

SPDT Latching Relay

SPST Solid State Relay