ElectroDroid great to know about ElectroDroid collection of electro tools which will be useful in calculating the value of resistance .I am looking more such blogs to be posted on these site in near future. ElectroDroid is a simple and powerful collection of electronics tools and reference; it includes: • Resistor color code decoder (3-6 bands); • SMD Resistor code; • Inductor color code decoder; • Ohm’s law calculator; • Reactance Calculator; • Voltage divider; • Resistor ratio, value/series/parallel; • Capacitor Charge Calculation; • Operational amplifier; • LED resistor calculator; • LM317 calculator; • Heat dissipation; • Battery Life calculator; • Inductor design tool (only donate version); • Voltage drop calculator; • Port pin-out (USB, serial, parallel, ethernet,