Breadboard Tutorial for Beginners HOW IT WORKS by Jeevan - February 26, 2021April 29, 20215 Before we dive into Breadboard tutorial for Beginners let’s first see How to use a breadboard properly as many are still doing major mistakes, Hope you are not the one! Breadboard is a prototyping platform for project builders.There are various types of BreadboardYou can test your designed circuits without actually permanently soldering components onto PCB. You just have to hock up components into premade sections and that’s it.So Breadboards are called solderless PCB Breadboard tutorial for beginners Key points to keep in mind while working with breadboard. Layout on paperPower linesStick labels on ICsJumpers for extending connectionsNo overhangsTest continuity using led Layout on paper before putting on breadboard The most crucial part for making any thing is that, you should have a clear vision of what you are making and same goes to breadboarding So before putting all components together on breadboard to check whether your designed circuit does work or not you should have a layout of how the components should be placed These can be called as breadboard diagram This avoids any misconnections or confusions while putting all things together Also you don’t have to figure out while prototyping where should the component go in order have an efficient breadboard circuit The handiest tool is a graph paper as it has pre-drawn equally spaced lines, Points with distance of 5mm are considered to two consecutive holes on breadboard Also to make the layout readable use different colors pens to represent different things An examples shows a stable oscillator using 555 timer IC on breadboard with its layout on graph paper Where black color represents breadboard, blue color represents components and red represents jumpers Breadboard layout of components Power lines or power rails of breadboard For powering the circuit on breadboard we have vertical lines provided for it But there’s a catch to use them. Out of four verticals lines Most use of them two are reserved for positive supply and two for negative supply The first one from left will be positive one then second will be negative one third will be positive and so forth will be negative The arrangement is so because most of standard ICs (e.g. 74xx series) have VCC connection on right side and ground (GND) on left side Jumpers join left power lines to right ones But what if your circuit uses multiple power sources (like 5v and 12v) in that case you just have to remove the middle jumpers to disconnect upper portion from lower ones and now you use multiple voltages for your circuit Breadboard power rails Stick labels on ICs Sticking label actually means sticking a piece of paper over IC showing which pin stands for what An example of 555 timer IC depicted in the following picture This trick tremendously helps save time which would rather wasted in checking for pin function every time in the datasheet You can create the label printing on paper or even writing them on paper if you can write that small Sticking it with craft glue works pretty well. I have added a template for 8 pin DIP, 14 pin DIP, 16 pin DIP. Details to use the template according to your need are given in the document which is template itself. Template for DIP PinsDownload Transistor attachment on breadboard Jumpers for extending connections These play crucial role in making the breadboarding process look neat and clean Jumpers are used in connecting components when the legs of components fall short Don’t get confused over jumper wires and jumpers Jumper wires are those which have a specific length and have a pointed spear like structure at both ends which gets into sockets of breadboard Jumper wires tend to make the process more messy and confusing For creating jumpers the most recommended is single strand wire Multi strand wire is never recommended as the wires tend to fray as we connect them To use single strand of wire as jumper first strip off about 1cm of insulation from the wire, mark other end from the insulation as per requirement and cut the wire leaving again 1cm from other end and strip off insulation from other end Now bend two exposed wires into L shaped and these will go into breadboard connecting any two horizontal sections or power the circuit Proper ways use jumper wires on breadboard No overhangs on breadboard To understand what overhanging components are, consider an example where you use a resistor if there is a gap between resistor and breadboard that means the component is overhanging If most of components are overhanging there is chance of short-circuit as depicted in a picture So to avoid these errors it recommended keeping the components as low as possible Breadboard proper use of components Test continuity using led Sometimes it may happen that the grippers which hold the legs of components gets widen up during course of time and they don’t anymore hold the components firmly resulting discounting in the circuit And the most basic method to check these discontinuities is to use a multi-meter But there is an alternative for it – LED To use a led as continuity tester we first need to add a current limiting resistor Snip off one, mostly the positive leg (as it will be easy to remember which is positive) and solder a resistor to it, use 470 ohm as it will protect LED from atmost 9v Now it is ready to as continuity tester The biggest advantage of using LED is that we can visualize the waveform in the circuit which greatly helps debugging Just like a mini oscilloscope 😉 Hope Breadboard tutorial for Beginners was sufficient enough to make you a pro! 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