Im trying to work out what resistor should I use for a school project but I keep getting confused I need to drop a 6V input to a max of 5.25V output but a min 4.25V, can anyone help me out with this?
Kind regards
Im trying to work out what resistor should I use for a school project but I keep getting confused I need to drop a 6V input to a max of 5.25V output but a min 4.25V, can anyone help me out with this?
Kind regards
you must now how much current that is flowing i.e 6volts minus 1 volts and say .1 A is abt 10 ohms..but maybe you need some low voltage regulator or a simple "voltage divider"..excuse my english ..i'm from sweden...Holger
If you don't know what current the device will draw then a resistor is no use. The simplest method is to connect two diodes in series with the positive supply - 1N4001 will handle 1A and USB can only supply up to 500mA.
Voltage dividers are good as long as the current drawn by the load is low (10 x less ) compared to the current flowing in the resistors network.
now if you do not have a fixed load or if the load takes up too much current your best bet is either a low drop out voltage or diodes in series....