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HC-SR501 Passive InfraRed (PIR) motion sensor can be used alone or with Arduino or other microcontroller. Adjustable sensitivity and timing. 33 x 24mm pc board. 25mm overall depth. CAT# PIR-7
$4.95 each
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5 red LEDs. Incorporated microphone. Adjustable sensitivity. Power supply: 3V type CR2032 battery (not included). Note: Kits cannot be returned or exchanged once assembly has begun. CAT# MK-115
$8.95 each
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This is a 5V Pro Mini running the 16MHz bootloader. The Pro Mini does not come with connectors populated so that you can solder in any connector or wire with any orientation you need. We recommend ... CAT# ARD-18
$4.90 each
10 or more    $4.75 each
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This is a 3.3V Pro Mini running the 8MHz bootloader. The Pro Mini does not come with connectors populated so that you can solder in any connector or wire with any orientation you need. We recommend... CAT# ARD-14
$4.90 each
10 or more    $4.75 each
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Optical heart rate sensor with amplification and noise cancellation circuitry making it fast and easy to get reliable pulse readings. In proximity to a pulse point on your body, it provides a digit... CAT# PSM-3
$14.00 each
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Raspberry Pi 3 model B (released February 2016). Single-board computer with wireless LAN and Bluetooth connectivity. · Quad Core 1.2GHz Broadcom BCM2837 64bit CPU · 1GB RAM · ... CAT# RP-3
$39.95 each
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Velleman # K2633. Control up to four high-power circuits from a low power drive circuit. Four 3 Amp / 240 Vac, S.P.D.T. relays. Quick and easy to build. LED status indicators. 3" x 1.7." Power supp... CAT# MK-2633
$21.95 each
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Give your Arduino the power to read and write RFID cards. Based on the versatile MFRC522 chip, this module allows you to both read and write MiFare-type cards. Can be used for identification applic... CAT# ME-138
$6.95 each
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Owikit# OWI-535. Easy to build and requires no soldering, OWI has made robotic arm technology more affordable without compromising quality. Using wired control box, command gripper to open and clo... CAT# OWI-535
$64.95 each
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Owikit# OWI-MSK681. Great little solar powered racing car kit for kids ages 8 and up. Easy and fast to assemble, no batteries required. Kids learn how gear mechanisms work and how green energy wor... CAT# MSK-681
$11.95 each
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The smallest and easiest to use serial conversion circuit on the market! This board has one purpose in life - to convert RS232 to TTL and vice versa (TX and RX). This will allow a microcontroller t... CAT# ARD-49
$13.95 each
10 or more    $12.56 each
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Velleman# MK-127. Bug-shaped miniature robot. Driven by two miniature motors, its photocell sensors seek light. Stops in total darkness. LED eyes indicate driving direction. 3.93" x 2.36." Operates... CAT# MK-127
$14.95 each
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Arduino compatible controller for 16 x 2 LCD modules. Also has output for LED backlight. 16-pin header solders into LCD. 42 x 19 x 8mm pc board (excluding header pins). CAT# LCD-SI
$3.00 each
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TowerPro SG92R 9g digital servo. POM with Carbon fiber gears. 180° rotation (90° each direction). Teflon bushing. Servo arms and screws included. Specifications: Weight: 9g Dimension:... CAT# DCS-118
$5.25 each
10 or more    $4.95 each
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Signal output: sine wave, triangle, square wave and integrator (selectable through jumper). Signal frequency: about 1 KHz (fixed). Output level: adjustable from 0 to 100mVrms (LEVEL potentiometer).... CAT# MK-105
$10.95 each
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Keyes "Funduino" Sound Sensor. Detects sounds using an LM386 audio amplifier and an electret microphone. Adjustable sensitivity with onboard pot. LED power indicator. Operates on 5 Vdc. CAT# SSM-1
$5.95 each
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Sparkfun # 12757. Sparkfun's economical alternative to the Arduino Uno, the RedBoard has most of the features of the Uno with the added benefit of an ISP header and FTDI interface. The RedBoard can... CAT# ARD-22
$19.95 each
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The SparkFun Inventor's Kit is a great way to get started with programming and hardware interaction with the Arduino programming language. The kit includes everything you need to complete five over... CAT# SFA-40
$99.95 each
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Push the button to start spinning action. Spinning speed gradually decreases, finally it stops and one LED remains lit. Auto power-off. Low power consumption. Power supply: 9V battery (not included... CAT# MK-152
$7.95 each
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SM-S4303S. 60° rotation. Dimensions: 41.3 x 20.7 x 40.0mm high (1.60" x 0.79" x 1.58"). Torque: 4.4kg/cm (61.11oz/in) @ 6V. Speed: 0.18sec / 60°. Weight: 44.0g. 3-pin JR connector. CAT# DCS-109
$8.95 each
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Generates sound of a vintage steam engine. Adjustable 'speed' and volume. Great for model railroads, radio plays, stage, as gadget. With 'steam whistle'-push button. Specifications: · pow... CAT# MK-134
$15.95 each
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DK Electronics V1.0. Arduino compatible motor shield. The board has two STMicroelectronics L293D Motor H-Bridge IC's which can drive up to 4 DC motors (or up to 2 stepper motors) with 0.6 A per bri... CAT# SMD-293
$6.95 each
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Based on the Allegro A4988 stepper driver chip, this board drives bi-polar stepper motors up to a max 2A/phase. It is a chopper microstepping driver which defaults to 16 step microstepping mode. It... CAT# STMD-2
$19.95 each
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AOSong AM2302. Capacitive humidity sensing. Digital capacitive and temperature output. Mounted on pc board with three lead, single-bus interface. Overall length, excluding leads, 1.46". Includes... CAT# SEN-17
$6.95 each
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Digital temperature and humidity sensor consists of a capacitive sense element and a precision wet NTC temperature measurement device with a high-performance 8-bit microcontroller connected. Standa... CAT# SEN-4
$3.00 each
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2-Axis, self-centering Joystick contains two independent 10K Ohm pots (one per axis) for reporting the joystick's position. Also has a select button actuated when the joystick is pressed down. CAT# JS-932
$3.95 each
10 or more    $3.56 each
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Miniature traffic light as used on four-way junctions. Realistic operation with adjustable delay. 12 LEDs. Great for model railroads, exhibitions, and toys. Low power consumption: 15mA. Power suppl... CAT# MK-131
$10.95 each
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Breakout board for the 3 axis ADXL335 from Analog Devices. The ADXL335 is a triple axis accelerometer with extremely low noise and power consumption - only 320uA! The sensor has a full sensing rang... CAT# ACL-69
$24.95 each
10 or more    $22.46 each
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The HC-SR04 Ultrasonic Sensor is an affordable proximity/distance sensor that can be used for object avoidance in various applications from robotics to car parking. The module has integral ultrason... CAT# UST-4
$4.50 each
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This kit was developed as a pre-module for a number of audio applications where the input signal is too weak. Applications as a microphone pre-amplifier or for level correction. Compact design. Low... CAT# MK-1803
$12.85 each
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The Uno R3 board contains everything needed to support the onboard ATmega328 microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get ... CAT# ARD-21
$14.00 each
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Velleman # MK-171. Make your voice sound like a robot. Add vibrato effect. Use pitch buttons to make your voice higher or lower. Built-in microphone and power amplifier with volume control - just a... CAT# MK-171
$16.80 each
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Buzzer sounds when water is detected. Water sensor can be placed at a distance by cutting the board and using wires to connect the sensor. 9V operation. Battery not included. Note: Kits cannot b... CAT# MK-108
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$7.95 each
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The ESP8266 WiFi Module is a self contained WiFi module capable of either hosting an application or offloading all Wi-Fi networking functions from another application processor. Pre-programmed with... CAT# ESP-12E
$5.35 each
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