This article is included in the ISTEM 2023 Series Let’s use our Breadboard PS to light an LED (light emitting diode). First, we can determine the LED voltage needed to light a general-purpose Green LED by looking at a data sheet. LED Forward Current vs. Forward Voltage Observing the characteristic curve of forward voltage vs forward …
This article is included in the ISTEM 2023 Series Start by opening the Arduino IDE application. Select the Windows Start Icon at the bottom left of the screen and select the Arduino IDE application. Arduino IDE at startup. Select the “Select Board” drop-down and note the Unknown Com ports. With the Breadboard Power Supply off and …
Introduction to Programming The Arduino Nano: My first program Read More »
This article is included in the ISTEM 2023 Series Steps for downloading the Arduino IDE: Go to https://www.arduino.cc/en/software On the right side of the site page – Select the DOWNLOAD OPTION that is correct for your computer. I selected Windows Win 10 and newer, 64 bits. Choose JUST DOWNLOAD or CONTRIBUTE & DOWNLOAD. Once the download …
This article is included in the ISTEM 2023 Series Locate the printed circuit board. Printed Circuit Board Start by soldering diodes D1-D4. Make sure the orientation of the diodes is correct. The silver band is the cathode and will go toward the K mark on the PCB. PCB with Polarity Correction Diodes The orientation of R1 …
This article is included in the ISTEM 2023 Series Basic Regulation Circuit: Using a 9V battery we can safely experiment with a basic voltage regulator. Basic 5V regulator using a 9V battery 2N3904 minimum Beta First Challenge: Calculate and find the resistor values for the above circuit to produce a regulated 5V output with a …
Previous Article in this series The prerequisite for this article can be read here: Unregulated Bridge Rectification Pi Filtered Power Supply Given Given: Vpri = 120v 60Hz, Turns ratio = 4:1, C1 = 10uF, RL = 10K Ohms Review the calculations for this circuit previously covered Unregulated Halfwave Filtered Power Supply The problem The problem with …
Previous Article in this series The prerequisite for this article can be read here: Unregulated Halfwave Filtered Power Supply Given Given: Vpri = 120v & 60Hz, Turns ratio = 4:1, C1 = 10uF, RL = 10K Ohms Calculate Primary Voltage Start by converting the primary RMS voltage to Peak voltage.$$Vpeak_{Primary}=frac{V_{RMS}}{0.707}$$$$Vpeak_{Primary}=frac{120V_{RMS}}{0.707}$$$$Vpeak_{Primary}=169.731vp$$ Primary Peak to Peak Voltage …
Unregulated Fullwave Center Tapped Filtered Power Supply Read More »
Previous Article in this series The prerequisite for this article can be read here: Unregulated Fullwave Bridge Rectifier with Filtering Given Given: Vpri = 120v & 60Hz, Turns ratio = 4:1, C1 = 10uF, C2=20uF, RS=500ohms, & RL = 10K Ohms Calculate Primary Voltage Start by converting the primary RMS voltage to Peak voltage.$$Vpeak_{Primary}=frac{V_{RMS}}{0.707}$$$$Vpeak_{Primary}=frac{120V_{RMS}}{0.707}$$$$Vpeak_{Primary}=169.731vp$$ Primary …
Previous Article in this series The prerequisite for this article can be read here: Unregulated Fullwave Center-Tapped Filtered Power Supply Given Given: Vpri = 120v & 60Hz, Turns ratio = 4:1, C1 = 10uF, RL = 10K Ohms Calculate Primary Voltage Start by converting the primary RMS voltage to Peak voltage.$$Vpeak_{Primary}=frac{V_{RMS}}{0.707}$$$$Vpeak_{Primary}=frac{120V_{RMS}}{0.707}$$$$Vpeak_{Primary}=169.731vp$$ Primary Peak to Peak …
Unregulated Fullwave Bridge Rectifier with Filtering Read More »
Introduction This is the first in a series of Power Supply articles I am working on. Each will evolve in complexity, function, and practical application. Before starting power supply experiments, review and follow electrical safety procedures. Here is a short article I wrote on Electrical Safety. Given Given: Vpri = 120v 60Hz, Turns ratio = …