Learn the circuits. Design the filters.
Free electronics tools and study material from Cursory Solutions: a reference library of 142 electronic circuits, SMPS converter filter design calculators, and 7 engineering textbooks in Urdu.
Circuits
Browse, search and study electronic circuits — schematics, PCB layouts, hex files, firmware source code and bills of materials.
Filter design
Pick a converter topology, adjust the inputs, and get live inductor, capacitor and transformer values.
Urdu engineering books
Free Electrical and Electronics engineering textbooks written in Urdu.