The post explains a simple 21 watt LED lamp circuit module which can be used as a direct replacement for a standard halogen lamp in motorcycles. The proposed "halogen" LED lamp replacement module image can be seen below: Conventional filament type halogen lamp is shown below: The image at the top shows an example LED lamp replacement for a standard halogen bulb fitting shown below it. With the easy and extensive availability of LEds, today it's quite possible to make any desired LED lamp module at home for replacing other forms of less efficient lamp options. So here we'll discuss how to make the proposed halogen LED lamp replacement circuit. Let's learn the procedures: Referring to the above image, we can see the LEDs are wired over 7 separate PCBs and then wired together to form one single module. Each board can be seen with 3 LEDs each, constituting a total of 21 LEDs. 3nos LEDs are selected because the supply 12V available from the vehicle allows only 3nos t...