Resistor Color Code Learning the resistor color code is fundamental to the study of electronics. A cool way to strengthen your understanding of the resistor color code is to write a basic program that will either decode your color code or encode your resistor value. MIT Scratch Programming Embedded below is my MIT Scratch program …
MIT Scratch & MIT App. Inventor and the Resistor Color Code Read More »
Desmos I love Desmos, it is a great free on-line tool that provides graphical analysis of mathematical formulas. I teach an applied calculus course and use Desmos all throughout the semester to help drive home concepts. Slope Intercept Form. Notice the equation y=mx+b, where m is the slope and b is the y-intercept. Adjust the …
Safety First The wall outlet at your house is 120-volt rms. 120vrms is dangerous. The circuit breaker at your house, which acts like a safety switch turning off the voltage when a maximum current has been exceeded, has a maximum current rating of 15 to 20 amps. Death can occur from as low as 100mA …
Why learn Engineering Notation? Engineering notation makes it easier for us to communicate electronic circuit values. Engineering Notation Format: Unlike Scientific Notation which has only one digit left of the decimal point, Engineering can have up to three digits left of the decimal point. $$XXX.X- mu A $$ $$XXX.X- MOmega $$ $$XXX.X- mW $$ …
Why is it important to know how to convert between RMS and Peak to Peak voltages? RMS voltage is used to calculate power for AC circuits. $$P_{watts(W)}=V_{(rms)}times I_{amps(rms)}$$$$P_{watts(W)}=frac{V_{rms}^2}{R_{ohms(Omega)}}$$ Our Oscilloscope displays Peak to Peak voltage. Both averaging and true-RMS DMMs display the RMS voltage of sinusoidal waveforms. For more information FLUKE true-RMS DMMs. Converting Oscilloscope …
Ohm’s Law: Ohm’s Law states that Electromotive Force (Voltage) is equal to Current multiplied by Resistance. $$E_{volts(V)}=I_{amps(A)}times R_{ohms(Omega)}$$ Simplified: $$E=Itimes R$$ We can now manipulate the above equation to solve for Current. $$I_{amps(A)}=frac{E_{volts(V)}}{R_{ohms(Omega)}}$$ Simplified: $$I=frac{E}{R}$$ And also Resistance. $$R_{ohms(Omega)}=frac{E_{volts(V)}}{I_{amps(A)}}$$ Simplified: $$R=frac{E}{I}$$ Power Formulas: The power formula states that Power is equal to Electromotive Force multiplied …