9V or 12V to 6V converter using LM7806 IC. LM7806 is a voltage regulator IC performs step down DC to DC converter tasks in electronic circuits. LM7806 is an IC of LM78xx series, there are many ICs in this series like LM7805, LM7809, LM7812 etc., all the ICs are made for different fixed output
voltage requirements while accept the input voltage upto 30V DC. But large difference between input and output voltage will convert into heat dissipation from the IC due to which big heatsink will be required. These type of ICs mostly use in battery chargers and power supply circuits. The input voltage source can be a battery, plug pack or transformer.