Hi friends, today I am going to tell you how to make a relay board for Arduino for less than $8. In this circuit, we are not going to use any IC or transistor.So, let's do it!!!
Step 1: Gather the Parts-
Step 2: Gather the Tools-
Step 3: Draw the Schematic-
Step 4: Solder the Components As Shown in Circuit-
Step 5: Comparison-