I have old Samsung charger. I want to make something with Arduino and relay. They are both using one charger. Problem is that when I turn on relay, (with transistor, no overload on microcontroller) power is very low in microcontroler and sometimes I had problem that relay went crazy and was ticking unlimited times coz there was not enough voltage for arduino...
So, I want to set "limiter" on relay. it is 3 volt relay and I don't want for it 5 volts. Is there any way to solve this problem? To use both Arduino and relay on one 5V charger ?
Of course there is, use some bad ass charger, capable of charging with something like 2 Ampere.
Or use a bad ass capacitor that will be able to supply the relay while it is switching on.
Or use a big capacitor to the Arduino power supply.
Or all of the above.
midler:
it is 3 volt relay and I don't want for it 5 volts.
Measure the resistance of the relay coil.
Use a resistor that is <= 2/3 of that value, and connect it in series with the coil.
Maybe the resistance is written on the relay, or you have the datasheet.
Leo..
