On my TI-83 the i is the 2nd function of my dot key. Math types calls this j, but electronics people call it i. To enter an imaginary number into a memory location of your TI, you append the small i. That's because a purely capacitive impedance has a phase angle of -90 degrees. If you are reading this, you've probably learned that the capacitor's reactance is represented by an imaginary number. storing the next value to our memory location H needs some explaining. Instead of typing 0.001 (where you can easily make a mistake in the amount of zeroes) you should enter 1E-3. And make it a habit to enter uF's, mA's, etc. Something to the power of -1 of course equals dividing 1 by something. You can see the general formula for a capacitor's reactance and how we enter it in the TI. Let's get started!įirst we need to compute the reactance for this particular capacitor at 60 Hz. In this instructable I will be using screenshots from my TI-83 Plus, so there might be slight differences in what you see on your graphing calculator, but generally they are very much the same.Īll you need is patience, a piece of paper, a pen and a TI calculator.
I have both a Casio and a TI, and I can only say the TI range of calculators is very popular for a reason. If you can do that, you can certainly learn how to do more complicated circuits.Īs for the TI calculator: I'm a part time teacher, and my students find the TI calculators far more intuitive to use than the Casio or other ones. The example we will follow is the first RC example from the AC (alternating current) book from that website: chapter 4.3, Series resistor-capacitor circuits. If you want to learn electronics, I highly recommend the free (yes, free) books from the All About Circuits website. It's just about doing the computations and getting the right results on your TI calculator. In this instructable we won't be explaining the electronics.
You're learning electronics, but how in the world are you going to do those computations with real and imaginary numbers on your brand new Texas Instruments TI graphing calculator? So many knobs to press.
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