How we can converter high dc to low dc?
Let's take an example that converter DC 24V to 12V. There are serveral tips could make you achieve your goal.
1# When in the small power situation can use three terminal integrated voltage regulator. Such as 7812 series in CHINA.
2# If the power is relatively a little bigger,what we can use switching mode power supply and make it into 12V. or we can buy directly from the super market or some stores.
3# Don't use resistance to split the voltage, which shall exhaust the energy wastely and with lowest efficiency. Make a regular power supplycircuit, adopt 3AD series and 3AX,0～52k adjustable resistor adjusting base and emitter voltage;
4# If use the regular and resistance split,it is easy to achive but without good efficiency and can be used with the lower wats power supply. if power supply is a bigger wats, should use Inverter rectifier to finish the direct changeable volvtage process.
5# In parallel a resistance with split voltage mehod.
No matter it's easy to make converter or not we have considerated our own case and take out the best solution to satisfy your project.