Quantity   Component name
1 × NodeCode http://www.nodecode.io
1 × HC-SR04 Range Finder http://amzn.to/2aSIpEE
4 × Solenoid http://amzn.to/2arq5Eg
1 × Raspberry Pi http://amzn.to/2iWx9xY
1 × Darlington Array http://amzn.to/2aeJLZ4