Netduino Building the Circuit on a Breadboard


Posted on Feb 4, 2014

Driving an LED, we covered the electronic theory of how to use a Power MOSFET to turn the LED On and Off via a digital signal. In this post, we are going to walk the reader step-by-step on how to wire-up the circuit on a breadboard. The Bread board is an electronic designer`s tool for easily prototyping a circuit as it allows easy insertion and removal of wires and components.


Netduino Building the Circuit on a Breadboard
Click here to download the full size of the above Circuit.

Yet there is enough friction in each individual socket to hold onto each component reasonably well. The bread board shown below is a pretty common variety. The bread board is broken up into positive (+) and negative (-) power rails  (both top and bottom) which span the width of the board. The positive rails are colored in Red, while the negative rails are colored in Blue. It should be noted that the rails are intentionally broken in the middle around column 30. As shown in the picture above, red and black jumper wires connect the two upper rails together. The lower rails shown here are not jumped, so they remain separate. In the middle of the bread board are multiple groups of holes organized in vertical columns and numbered every 5 (for reference). Each group consists of 5 pin sockets wired together vertically. These groups are not connected over the middle horizontal break of the board, nor do they connect horizontally. Looking at the circuit schematic, we are going to start with the right half of the circuit diagram which consists of the MOSFET, the LED, and the 68 ohm resistor. (The resistor in the image is a 100 ohm resistor. The value is close enough that the LED will still glow. ) 2) Connect the Cathode (-) of the LED to the Drain on the MOSFET (shown in red labeled D ). You can determine which side of the LED is the Cathode a few different ways: 4) Connect one side of the 68 (or 100) ohm resistor to the Anode of...




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