1 - TL082 (dual op amp)
2 - 1N4148 (diode)
1 - TIP122 (NPN transistor)
1- BC558 (PNP transistor. You can use a BC557, BC556 or equivalent. They are all fine for this application)
1 - 2700ohm resistor
1 - 1000ohm resistor
1 - 10Kohm resistor
1 - 22Kohm resistor
1 - Series resistor (see previous step)
1 - 10Kohm potentiometer
1 - 470uf capacitor
1 - 1uf capacitor
1 - Normally Closed Momentary Switch (see attached picture. Any normally closed momentary switch will work fine)
1 - Relay model T74 (This is a very common relay model. Easy to find in
eBay. Just try to search for "G5LA-14" on eBay. There are many coil voltages and contacts amperage. If you dont want to use this model, make sure to change the PCB layout)