Question: ac to dc converter how to make?
Answer: Step 1: Choose the Transformer. In this project we choose a 12VAC 20VA transformer with screws at the bottom. ... 
Step 2: Build the Bridge Rectifier With One Capacitor in Parallel With It. In this step, we build an bridge rectifier which make up of four 1N4001 diodes. ... 
Step 3: Add the Voltage Regulator to Give 5v DC Output.