arduino control 12v relayを探す

スポンサー
広告について
$29.39
Airsource 12 Volt 35 Amps Normally Open Relay Switch With 4 Pin Connector | Relay-4 Pin/Navistar Prostar | 1523
FleetPride
$29.39
Airsource 12 Volt 35 Amps Normally Open Relay Switch With 4 Pin Connector | Relay-4 Pin/Navistar Prostar | 1523
FleetPride
$14.29
Primatech OTR 12 V 30-40A 5-Terminal A/C Relay Switch For Multi Fit Applications | Relay 12V 5 Term 30/40 Amp | PTAC1252
FleetPride
$14.29
Primatech OTR 12 V 30-40A 5-Terminal A/C Relay Switch For Multi Fit Applications | Relay 12V 5 Term 30/40 Amp | PTAC1252
FleetPride
$26.69
Airsource 12V 10-20A 5-Terminal SPDT A/C Relay For Freightliner | 5 Terminal Relay-Freightliner | 1268
FleetPride
$26.69
Airsource 12V 10-20A 5-Terminal SPDT A/C Relay For Freightliner | 5 Terminal Relay-Freightliner | 1268
FleetPride
$7.39
Airsource 12V 30-40A 5-Terminal SPDT A/C Relay For Multi Fit Applications | 12V-5 Terminal Bosch Type Relay 30-40Amp | 1250
FleetPride
$7.39
Airsource 12V 30-40A 5-Terminal SPDT A/C Relay For Multi Fit Applications | 12V-5 Terminal Bosch Type Relay 30-40Amp | 1250
FleetPride
$6.19
Cole Hersee 40A High Power Diode Relay With Bracket | Relay, Form_C, 12V, Resistor Brkt | RC-400112-RN-BX
FleetPride
$6.19
Cole Hersee 40A High Power Diode Relay With Bracket | Relay, Form_C, 12V, Resistor Brkt | RC-400112-RN-BX
FleetPride
$73.99
Air Source 12V Relay Kit | 5 Term 12V Relay Kit Weather Proof Seal | 1260
FleetPride
$73.99
Air Source 12V Relay Kit | 5 Term 12V Relay Kit Weather Proof Seal | 1260
FleetPride
$12.49
Cole Hersee 70A High Power Diode Relay With Bracket | Relay, 70A, Form_A, 12V, Bracket, | RA-700112-NN-BX
FleetPride
$12.49
Cole Hersee 70A High Power Diode Relay With Bracket | Relay, 70A, Form_A, 12V, Bracket, | RA-700112-NN-BX
FleetPride
$24.69
Airsource 12V 5-Terminal A/C Relay | Relay/12V/ 30/50A 5T Diode | 1252A
FleetPride
$24.69
Airsource 12V 5-Terminal A/C Relay | Relay/12V/ 30/50A 5T Diode | 1252A
FleetPride
$25.77
12V 10A 16 Channel Relay Module For Arduino Arm Pic Avr Dsp Raspberry
eBay
$25.77
12V 10A 16 Channel Relay Module For Arduino Arm Pic Avr Dsp Raspberry
eBay
$36.91
5V/12V Relay Module Interface Board For High Low Level Arduino 1/2/4/8 Channels
eBay.com
$36.91
5V/12V Relay Module Interface Board For High Low Level Arduino 1/2/4/8 Channels
eBay.com
$25.00
12V Relay Module With Optocoupler For Pic Avr Dsp Arm Arduino
eBay
Free shipping
$25.00
12V Relay Module With Optocoupler For Pic Avr Dsp Arm Arduino
eBay
$21.45
5V/12V 1/4 Channel Relay Module With Remote Control PIC AVR DSP ARM For Arduino
eBay.com
Free shipping
$21.45
5V/12V 1/4 Channel Relay Module With Remote Control PIC AVR DSP ARM For Arduino
eBay.com
$1.68
Relay 12V Control Board Module 5V Arduino 24Vdc Voltage 24V Switch 5 12 24 V DC 5Vdc 12Vdc Rele Rela
Aliexpress
$1.68
Relay 12V Control Board Module 5V Arduino 24Vdc Voltage 24V Switch 5 12 24 V DC 5Vdc 12Vdc Rele Rela
Aliexpress
$0.59
$0.66
5V 12V 1 2 4 6 8 Way Relay Module For Arduino 1 2 4 6 8 Channel Relay Module With Optocoupler Relay
Aliexpress
Free shipping
10% オフ
$0.59
$0.66
5V 12V 1 2 4 6 8 Way Relay Module For Arduino 1 2 4 6 8 Channel Relay Module With Optocoupler Relay
Aliexpress
$1.21
5V 12V 1 2 4 6 8 Way Relay Module For Arduino 1 2 4 6 8 Channel Relay Module With Optocoupler Relay
Aliexpress
$1.21
5V 12V 1 2 4 6 8 Way Relay Module For Arduino 1 2 4 6 8 Channel Relay Module With Optocoupler Relay
Aliexpress
$1.60
DC 5V 12V 1 2 4 6 8 Way Relay Module For Arduino 1 2 4 6 8 Channel Relay Module With Optocoupler
Aliexpress
$1.60
DC 5V 12V 1 2 4 6 8 Way Relay Module For Arduino 1 2 4 6 8 Channel Relay Module With Optocoupler
Aliexpress
$25.19
$27.38
8Ch Dc 12V Pro Mini Relay Shield Module Plc Timer Board For Arduino
eBay
$25.19
$27.38
8Ch Dc 12V Pro Mini Relay Shield Module Plc Timer Board For Arduino
eBay
$11.38
16-Channel 12V Relay Shield Module With Optocoupler LM2576 Power For Arduino
eBay.com
$11.38
16-Channel 12V Relay Shield Module With Optocoupler LM2576 Power For Arduino
eBay.com
$0.48
$0.71
DC 12V Two 2CH 2 Way Channel Relay Module With Optocoupler For PIC AVR DSP ARM For Arduino TOP Diy
Aliexpress
32% オフ
$0.48
$0.71
DC 12V Two 2CH 2 Way Channel Relay Module With Optocoupler For PIC AVR DSP ARM For Arduino TOP Diy
Aliexpress
$59.99
HD30A 8 Channel I2C Electromagnetic Relay Module 12V PCF8574 Arduino Raspberry
US eBay
Free shipping
$59.99
HD30A 8 Channel I2C Electromagnetic Relay Module 12V PCF8574 Arduino Raspberry
US eBay
$22.76
5V 12V 24V 1/2/4/8 Channel Relay Board Module Arduino Raspberry Pi PIC
eBay.com
Free shipping
$22.76
5V 12V 24V 1/2/4/8 Channel Relay Board Module Arduino Raspberry Pi PIC
eBay.com
$9.54
$12.89
DC 5V 12V 24V 16 Channel Relay Module For Arduino ARM PIC AVR DSP Electronic Relay Optocoupler
Aliexpress
25% オフ
$9.54
$12.89
DC 5V 12V 24V 16 Channel Relay Module For Arduino ARM PIC AVR DSP Electronic Relay Optocoupler
Aliexpress
$2.40
12V Relay 1 2 4 8 Channel SSR High Low Level Solid State Relay Module 250V 2A For Arduino 5V Relay
Aliexpress
Free shipping
$2.40
12V Relay 1 2 4 8 Channel SSR High Low Level Solid State Relay Module 250V 2A For Arduino 5V Relay
Aliexpress
$7.05
$8.29
5V/12V 16 Channel Relay Module For Arduino ARM PIC AVR DSP Electronic Relay Plate Belt Optocoupler
Aliexpress
14% オフ
$7.05
$8.29
5V/12V 16 Channel Relay Module For Arduino ARM PIC AVR DSP Electronic Relay Plate Belt Optocoupler
Aliexpress
$38.73
1 2 4 8 16 Channels Relay Board Module High/Low Level 5V 12V For Arduino AVR ARM
eBay.com
$38.73
1 2 4 8 16 Channels Relay Board Module High/Low Level 5V 12V For Arduino AVR ARM
eBay.com
$0.20
$0.40
5V 12V 24V Relay Module With Optocoupler Relay Output 1 2 4 6 8 Way Relay Module For Arduino
Aliexpress
Free shipping
50% オフ
$0.20
$0.40
5V 12V 24V Relay Module With Optocoupler Relay Output 1 2 4 6 8 Way Relay Module For Arduino
Aliexpress
$9.30
16-Channel 12V Relay Module Board For Arduino DSP AVR PIC ARM, Microcontroller Relay, Automation Projects, Compact Design, Professional Board,
Temu US
17
$9.30
16-Channel 12V Relay Module Board For Arduino DSP AVR PIC ARM, Microcontroller Relay, Automation Projects, Compact Design, Professional Board,
Temu US
$1.32
1 2 4 6 8 Channel 5V 12V Relay Module With Optocoupler Relay For Arduino Output 1 2 4 6 8 Way Relay
Aliexpress
Free shipping
$1.32
1 2 4 6 8 Channel 5V 12V Relay Module With Optocoupler Relay For Arduino Output 1 2 4 6 8 Way Relay
Aliexpress
$6.45
5V 12V 24V 8 Channel Relay Module With Optocoupler Relay Output 8 Way Relay Module For Arduino
Aliexpress
$6.45
5V 12V 24V 8 Channel Relay Module With Optocoupler Relay Output 8 Way Relay Module For Arduino
Aliexpress
$71.41
16 Channel 12V Relay Module Interface Board For Arduino PIC ARM DSP PLC
eBay.com
$71.41
16 Channel 12V Relay Module Interface Board For Arduino PIC ARM DSP PLC
eBay.com
$0.80
$1.13
5V 12V 24V Relay Module With Optocoupler Relay Output 1 2 4 6 8 Channel Relay Module For Arduino Diy
Aliexpress
29% オフ
$0.80
$1.13
5V 12V 24V Relay Module With Optocoupler Relay Output 1 2 4 6 8 Channel Relay Module For Arduino Diy
Aliexpress
$14.99
12V Delay Relay Module NE555 Chip For Arduino - 3Pcs Power On Delay Circuit
Evalm
$14.99
12V Delay Relay Module NE555 Chip For Arduino - 3Pcs Power On Delay Circuit
Evalm
$45.81
12V 10 Channel Relay Module Board For Arduino PIC AVR MCU DSP ARM Electronic
eBay.com
$45.81
12V 10 Channel Relay Module Board For Arduino PIC AVR MCU DSP ARM Electronic
eBay.com
$17.98
5V/12V Relay Board Module Optocoupler LED For Arduino Pic ARM 1/2/4/6/8 Channel
eBay.com
$17.98
5V/12V Relay Board Module Optocoupler LED For Arduino Pic ARM 1/2/4/6/8 Channel
eBay.com
$17.97
5V/12V Relay Board Module Optocoupler LED For Arduino Pic ARM 1/2/4/6/8 Channel
eBay.com
$17.97
5V/12V Relay Board Module Optocoupler LED For Arduino Pic ARM 1/2/4/6/8 Channel
eBay.com
$125.56
5V/12V/24V 1 2 Channel Solid State Relay Module DC-DC Arduinos Raspberry Pi PIC
eBay.com
$125.56
5V/12V/24V 1 2 Channel Solid State Relay Module DC-DC Arduinos Raspberry Pi PIC
eBay.com
How to use 12V Relay module with Arduino to control High Voltage Devices | How Relay Module works
8:30
YouTubeTech StudyCell
How to use 12V Relay module with Arduino to control High Voltage Devices | How Relay Module works
In this video, I have shown how to use 12V Relay module with Arduino to control High Voltage AC Devices like 220v bulb, motor etc with Arduino code and arduino relay circuit diagram. I have also explained how the relay module works with the circuit diagram. You can download the Gerber file for the PCB and order it from https://www.seeedstudio ...
視聴回数: 4.5万 回2019年2月16日
Arduino Projects
12 Best Arduino Projects for Beginners in 2024!
7:38
12 Best Arduino Projects for Beginners in 2024!
YouTubeToP Projects Compilation
視聴回数: 38.5万 回2024年7月26日
10 Arduino Projects with DIY Step by Step Tutorials
5:30
10 Arduino Projects with DIY Step by Step Tutorials
YouTubeHow To Mechatronics
視聴回数: 258万 回2017年12月7日
15 Great Arduino Projects for beginners
10:16
15 Great Arduino Projects for beginners
YouTubeMaker Tutor
視聴回数: 177.4万 回2018年12月4日
人気の動画
How to use 12VDC Relay Module with Arduino
13:29
How to use 12VDC Relay Module with Arduino
YouTubePassion Tech KLM
視聴回数: 4万 回2022年7月29日
How to control 12V devices with Arduino. Using Relay vs Using N-Channel MOSFET transistor
12:57
How to control 12V devices with Arduino. Using Relay vs Using N-Channel MOSFET transistor
YouTubeMario's Ideas
視聴回数: 17万 回2021年1月15日
DIY How To Use and connect arduino with 16 Relay Trigger 12V LM2596
21:06
DIY How To Use and connect arduino with 16 Relay Trigger 12V LM2596
YouTubeUnboxing Channel
視聴回数: 5.8万 回2019年4月26日
Arduino Tutorial
Arduino Tutorial 1: Setting Up and Programming the Arduino for Absolute Beginners
23:50
Arduino Tutorial 1: Setting Up and Programming the Arduino for Absolute Beginners
YouTubePaul McWhorter
視聴回数: 292.7万 回2019年5月31日
Arduino Course for Beginners - Open-Source Electronics Platform
4:04:22
Arduino Course for Beginners - Open-Source Electronics Platform
YouTubefreeCodeCamp.org
視聴回数: 260.5万 回2021年6月8日
Arduino Course for Everybody
10:28:56
Arduino Course for Everybody
YouTubefreeCodeCamp.org
視聴回数: 135.4万 回2023年11月8日
How to use 12VDC Relay Module with Arduino
13:29
01:34 からのビデオで検索Connecting the Relay Module
How to use 12VDC Relay Module with Arduino
視聴回数: 4万 回2022年7月29日
YouTubePassion Tech KLM
How to control 12V devices with Arduino. Using Relay vs Using N-Channel MOSFET transistor
12:57
03:11 からのビデオで検索Controlling with Photoresistor
How to control 12V devices with Arduino. Using Relay vs Using N-Cha…
視聴回数: 17万 回2021年1月15日
YouTubeMario's Ideas
DIY How To Use and connect arduino with 16 Relay Trigger 12V LM2596
21:06
DIY How To Use and connect arduino with 16 Relay Trigger 12V LM2596
視聴回数: 5.8万 回2019年4月26日
YouTubeUnboxing Channel
Arduino Relay Module Tutorial - From Beginner to PRO
1:58
Arduino Relay Module Tutorial - From Beginner to PRO
視聴回数: 5958 回7 か月前
YouTubeHuHamster
How to control 12VDC relay module with Arduino
8:57
How to control 12VDC relay module with Arduino
視聴回数: 4 回1 か月前
YouTubePassion Tech KLM
How to use an Arduino Relay Module
4:41
04:14 からのビデオで検索Successful Control of Heavy Load Light
How to use an Arduino Relay Module
視聴回数: 16.9万 回2018年2月4日
YouTubeTinker & Build
Arduino relay basics - how it works and how to use it
7:19
0:00 からのビデオで検索Introduction to Relays
Arduino relay basics - how it works and how to use it
視聴回数: 1.6万 回2021年11月10日
YouTubeTaste The Code
1:48
00:01 からのビデオで検索Introduction to Relay Control
Arduino Relay Control: A Beginner's Guide to Controlling Machines
視聴回数: 1.5万 回2023年2月24日
YouTubeCircuit Digest
13:04
0:00 からのビデオで検索Introduction to 12VDC Relay
How to use 12VDC relay with Arduino Uno
視聴回数: 3715 回2022年7月21日
YouTubePassion Tech KLM
6:32
How to use 12VDC relay with Arduino Uno
視聴回数: 679 回3 か月前
YouTubePassion Tech KLM
3:00
How to use 12VDC relay with Arduino
1 か月前
YouTubePassion Tech KLM
44:13
How to Control a 12V Motor with Arduino: Easy Wiring & Code Examples
視聴回数: 75.6万 回2023年11月28日
YouTubeRachel De Barros
5:02
04:12 からのビデオで検索Demo of Switching AC Bulb Using Arduino and Relay
What is Relay? | How to control Relay using Arduino
視聴回数: 10.4万 回2021年5月1日
YouTubehash include electronics
8:01
Control High-Power Devices with Arduino & Relays | Arduino Tutorials
視聴回数: 1968 回10 か月前
YouTubeATECHS
2:24
00:09 からのビデオで検索Introduction to Linear Actuator Control
Controlling a Linear Actuator with an Arduino and Relay
視聴回数: 15.5万 回2020年6月1日
YouTubeFIRGELLI Automations
11:51
00:11 からのビデオで検索Connecting the Relay
How to use 2 channel relay to control AC and DC loads in Arduino
視聴回数: 19.7万 回2017年12月26日
YouTubeRobojax
15:13
00:12 からのビデオで検索Introduction to Arduino Relays
Arduino Basics - Relays
視聴回数: 14.1万 回2016年9月20日
YouTubeElectro-Anarchy
12:30
11:54 からのビデオで検索Conclusion of How to use relay with Arduino to control AC or DC load with bare relay
How to use relay with Arduino to control AC or DC load with bare relay …
視聴回数: 8.8万 回2018年10月13日
YouTubeRobojax
2:27
How to Use Arduino 4 Channel Relay Shield Using Visual Programming
視聴回数: 252 回2 か月前
YouTubeArduinoProjects
17:38
Home Automation: 12V Relay with LED Display Delay 0.1 seconds to 999 sec…
視聴回数: 36.5万 回2018年5月12日
YouTubeRobojax
17:33
How to use 4 channel Relay to control AC load with Arduino code RJT71
視聴回数: 17.8万 回2018年3月27日
YouTubeRobojax
11:41
02:16 からのビデオで検索Control Circuitry and Power Switching
Connecting a Relay Module to a Microcontroller
視聴回数: 32.3万 回2021年3月12日
YouTubeBrad Henson
5:26
Arduino Relay Modules | Proteus Library
視聴回数: 3.8万 回2023年11月28日
YouTubeELECTRONICS TREE
14:01
0:00 からのビデオで検索Introduction to DC Motor Control
Control a DC Motor with Arduino (Lesson #16)
視聴回数: 38.4万 回2023年4月27日
YouTubeScience Buddies
3:30
03:00 からのビデオで検索Testing the Control
Control 12VDC Solenoid Door Lock Using A Relay On Arduino
視聴回数: 16.6万 回2020年1月31日
YouTubeCytron Technologies
12:16
0:00 からのビデオで検索Introduction to Relay Control System
Relay Control with Arduino & DWIN HMI Display
視聴回数: 2.9万 回2022年12月21日
YouTubeIoT Projects Ideas
12:41
8 Channel Relay Control with Arduino & DWIN HMI Display
視聴回数: 1077 回6 か月前
YouTubeIoT Projects Ideas
14:19
Control Multiple Wifi Relay With Arduino and ESP Relay New ESP826…
視聴回数: 1588 回3 か月前
YouTubeElectronicSpot Eng
8:04
Arduino 101: Learn How to Use a Relay with Arduino
視聴回数: 212 回7 か月前
YouTubePond Tech Channel
その他のビデオを表示する
静的サムネイルプレースホルダー

arduino control 12v relayを探す

スポンサー
広告について
$29.39
Airsource 12 Volt 35 Amps Normally Open Relay Switch With 4 Pin Connector | Relay-4 Pin/Navistar Prostar | 1523
FleetPride
$29.39
Airsource 12 Volt 35 Amps Normally Open Relay Switch With 4 Pin Connector | Relay-4 Pin/Navistar Prostar | 1523
FleetPride
$14.29
Primatech OTR 12 V 30-40A 5-Terminal A/C Relay Switch For Multi Fit Applications | Relay 12V 5 Term 30/40 Amp | PTAC1252
FleetPride
$14.29
Primatech OTR 12 V 30-40A 5-Terminal A/C Relay Switch For Multi Fit Applications | Relay 12V 5 Term 30/40 Amp | PTAC1252
FleetPride
$26.69
Airsource 12V 10-20A 5-Terminal SPDT A/C Relay For Freightliner | 5 Terminal Relay-Freightliner | 1268
FleetPride
$26.69
Airsource 12V 10-20A 5-Terminal SPDT A/C Relay For Freightliner | 5 Terminal Relay-Freightliner | 1268
FleetPride
$7.39
Airsource 12V 30-40A 5-Terminal SPDT A/C Relay For Multi Fit Applications | 12V-5 Terminal Bosch Type Relay 30-40Amp | 1250
FleetPride
$7.39
Airsource 12V 30-40A 5-Terminal SPDT A/C Relay For Multi Fit Applications | 12V-5 Terminal Bosch Type Relay 30-40Amp | 1250
FleetPride
$6.19
Cole Hersee 40A High Power Diode Relay With Bracket | Relay, Form_C, 12V, Resistor Brkt | RC-400112-RN-BX
FleetPride
$6.19
Cole Hersee 40A High Power Diode Relay With Bracket | Relay, Form_C, 12V, Resistor Brkt | RC-400112-RN-BX
FleetPride
$73.99
Air Source 12V Relay Kit | 5 Term 12V Relay Kit Weather Proof Seal | 1260
FleetPride
$73.99
Air Source 12V Relay Kit | 5 Term 12V Relay Kit Weather Proof Seal | 1260
FleetPride
$12.49
Cole Hersee 70A High Power Diode Relay With Bracket | Relay, 70A, Form_A, 12V, Bracket, | RA-700112-NN-BX
FleetPride
$12.49
Cole Hersee 70A High Power Diode Relay With Bracket | Relay, 70A, Form_A, 12V, Bracket, | RA-700112-NN-BX
FleetPride
$24.69
Airsource 12V 5-Terminal A/C Relay | Relay/12V/ 30/50A 5T Diode | 1252A
FleetPride
$24.69
Airsource 12V 5-Terminal A/C Relay | Relay/12V/ 30/50A 5T Diode | 1252A
FleetPride
$25.77
12V 10A 16 Channel Relay Module For Arduino Arm Pic Avr Dsp Raspberry
eBay
$25.77
12V 10A 16 Channel Relay Module For Arduino Arm Pic Avr Dsp Raspberry
eBay
$36.91
5V/12V Relay Module Interface Board For High Low Level Arduino 1/2/4/8 Channels
eBay.com
$36.91
5V/12V Relay Module Interface Board For High Low Level Arduino 1/2/4/8 Channels
eBay.com
$25.00
12V Relay Module With Optocoupler For Pic Avr Dsp Arm Arduino
eBay
Free shipping
$25.00
12V Relay Module With Optocoupler For Pic Avr Dsp Arm Arduino
eBay
$21.45
5V/12V 1/4 Channel Relay Module With Remote Control PIC AVR DSP ARM For Arduino
eBay.com
Free shipping
$21.45
5V/12V 1/4 Channel Relay Module With Remote Control PIC AVR DSP ARM For Arduino
eBay.com
$1.68
Relay 12V Control Board Module 5V Arduino 24Vdc Voltage 24V Switch 5 12 24 V DC 5Vdc 12Vdc Rele Rela
Aliexpress
$1.68
Relay 12V Control Board Module 5V Arduino 24Vdc Voltage 24V Switch 5 12 24 V DC 5Vdc 12Vdc Rele Rela
Aliexpress
$0.59
$0.66
5V 12V 1 2 4 6 8 Way Relay Module For Arduino 1 2 4 6 8 Channel Relay Module With Optocoupler Relay
Aliexpress
Free shipping
10% オフ
$0.59
$0.66
5V 12V 1 2 4 6 8 Way Relay Module For Arduino 1 2 4 6 8 Channel Relay Module With Optocoupler Relay
Aliexpress
$1.21
5V 12V 1 2 4 6 8 Way Relay Module For Arduino 1 2 4 6 8 Channel Relay Module With Optocoupler Relay
Aliexpress
$1.21
5V 12V 1 2 4 6 8 Way Relay Module For Arduino 1 2 4 6 8 Channel Relay Module With Optocoupler Relay
Aliexpress
$1.60
DC 5V 12V 1 2 4 6 8 Way Relay Module For Arduino 1 2 4 6 8 Channel Relay Module With Optocoupler
Aliexpress
$1.60
DC 5V 12V 1 2 4 6 8 Way Relay Module For Arduino 1 2 4 6 8 Channel Relay Module With Optocoupler
Aliexpress
$25.19
$27.38
8Ch Dc 12V Pro Mini Relay Shield Module Plc Timer Board For Arduino
eBay
$25.19
$27.38
8Ch Dc 12V Pro Mini Relay Shield Module Plc Timer Board For Arduino
eBay
$11.38
16-Channel 12V Relay Shield Module With Optocoupler LM2576 Power For Arduino
eBay.com
$11.38
16-Channel 12V Relay Shield Module With Optocoupler LM2576 Power For Arduino
eBay.com