In a 4-band resistor, the first two bands represent the first two digits of the resistor. The multiplier band indicates the value that is to be multiplied with the first two digits. The tolerance band after the multiplier band indicates the range of accuracy of the resistor. It is represent...
A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. Resistors may be used to reduce current flow, and, at the same time, may act to lower voltage levels within circuits. In electronic circuits, resistors are used to limit current...
1:Batteries. Two AA alkalines, in this case; feel free to use some other combination if you like. (Three D cells would give you outrageously long run time.) The batteries you choose determine which... 2: ...resistoryou should use in series with the laser module. ...