EL tools: Circuit Calculator

All the everyday calculations for electrical design, in one app. When you're designing a circuit, small questions keep coming up: "Will this resistor pair give me the voltage I need?" "What's the rise time of this RC circuit?" "What do three resistors in parallel add up to?" "Where is the cutoff frequency of this filter?" "Which resistors give this amplifier a gain of 10?" "What is 0x3F8 in binary?" Too small to open a spreadsheet, but you want the answer right now. EL tools is a practical calculator for electrical design that lets you check these things quickly on your phone. ■ Voltage Divider Enter the input voltage and target output voltage, choose a standard resistor series (E6/E12/E24/E48), and instantly find the R1/R2 combinations closest to your target. The min/typ/max output voltage is shown for each combination, taking resistor tolerance (and input voltage tolerance) into…