https://youtube.com/watch?v=IaEPh6Gva28
Item Link-https:// www.amazon.in/Electrobot-EB-RES40-Value-Resistor-Pack/dp/B01MDP3137/ref=pd_cp_328_2/260-8343485-9719629?_encoding=UTF8&pd_rd_i=B01MDP3137&pd_rd_r=f0ee52f1-433c-11e9-8a7d-e7ec3eadf0c5&pd_rd_w=z9CZh&pd_rd_wg=TZ4UV&pf_rd_p=cf49abc6-2d3e-4a22-9a85-f5ff7f5942fa&pf_rd_r=C3PNSBA8GFR8QTMRJA3H&psc=1&refRID=C3PNSBA8GFR8QTMRJA3H.
4440 ic complete bass examination and also pcb design: https://youtu.be/65QFVPqe-4A.