Please Note: All the Parts (links) marked with "*" will be installed on the PCB 

Digikey.com Parts List
* 1. Rellay https://www.digikey.com/short/r54p5m38
* 2. Toggle switch  https://www.digikey.com/short/mj91t308
* 3. Zener Diode https://www.digikey.com/short/hr75h1pm
* 4. Light Incandecent https://www.digikey.com/short/zp78fm1v
* 5. Power Connector https://www.digikey.com/short/b9qt8b23
* 6. 100k Potenciometer https://www.digikey.com/short/jhbpp3b2
* 7. 3.5 mm Plug https://www.digikey.com/short/9p25qj75
* 8. 50V 1A Diode https://www.digikey.com/short/bfq4dt94
9. 30VDC 300mA Power supply https://www.digikey.com/short/jzpd7tn9

Ebay.com Parts list
* 10. NE555 Adjustable Signal Generator Board Module (PWM) https://www.ebay.com/itm/224775045296?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=Y1eA0PO-TMO&sssrc=2047675&ssuid=PeL5CPDPSf6&widget_ver=artemis&media=COPY
11. 3.5 mm TENS Lead Wires - Two 2mm Pin Connectors https://www.ebay.com/itm/195987988137?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=Y3_gSQBNQz-&sssrc=2047675&ssuid=PeL5CPDPSf6&var=495850345153&widget_ver=artemis&media=COPY
12. TENS Electrode Pads EMS Replacement Unit https://www.ebay.com/itm/283856565129?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=hVDcqkhbRo6&sssrc=2047675&ssuid=PeL5CPDPSf6&widget_ver=artemis&media=COPY
13. 99.99 Pure Silver Wire 14 Gauge - Two 6 inch rods https://www.ebay.com/itm/322147273809?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=RDfVlSUVSuW&sssrc=2047675&ssuid=PeL5CPDPSf6&widget_ver=artemis&media=COPY