| Author | Message | ||
     Arcygenical Unregistered guest |
I'm really confused about power draw of an Ac to Dc Adapter... If it says it can supply 4.5v at 0.6a (or 600ma) does that mean that it always supplies 4.5v and 600ma or does it mean that the adapter will supply 4.5v and only as many ma as needed, or does it mean it supplies 4.5v to each device to a max of 600ma used in the circuit... (So confused, sorry) I need to make sure i'm not overloading my circuit because it can damage the main component therefore making it useless. (In case you're wondering, I'm making an alarm using a laser and a solar panel, if the laser beam is broken the total voltage on the solar panel receiver drops down, therefore making a low voltage alarm sound ;) ) | ||
| Simon Quellen Field (sfield) New member Username: sfield Post Number: 130 Registered: 12-2004 |
Read about Ohm's Law. The current in the circuit depends on the voltage and the resistance. The adapter can supply as much as 600 ma before it starts to overheat. If your circuit had a resistance of 7.5 ohms, it would draw 600 ma at 4.5 volts. |
