A breadboard is a pre-made generic board for prototyping, typically referring to solder-less, reusable plugboards.

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CMOS on breadboard - Which P & N type MOSFETs to get started?

I would like to implement my own CMOS logic on a breadboard. I have already designed a simple PCB with basic logical functionality but now I'm stuck on the choice of N & P Type transistors ...
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23 views

4:1 multiplexer and 2:1 multiplexer

The question given as below: F1(A,B,C)=∑m(5,6,7) and F2(A,B,C)=∑m(0,6,7) Implement using 4:1 multiplexers and 2:1 multiplexers. 1.How can I implement them if I have 2 inputs? 2.How will be the ...
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0answers
41 views

Simple Question: Wire Size For Breadboard? [duplicate]

What size wire should i buy for breadboard? I have jumper cables for arduino but i want custom length so solid copper wire is the way to go. I found quite a lot on ebay and I am wondering should i buy ...
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0answers
18 views

arduino not in sync unique error [migrated]

when i try uploading to my arduino/genuino uno i get the following not in sync error with "unique" resp(resp=0X54) or (resp=0X81) please solve ...i have to submit my project tommorow...... error ...
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3answers
80 views

Are there better alternatives for these buffers?

I'm building a circuit that extract the DC component of an input signal, ,divide the DC component by 5, and finally add 2.5V it. Here is the schematic of the circuit (the last op-amp is to invert ...
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1answer
42 views

Battery voltage drops when connected to PCB

I have a circuit containing an atmega328p microcontroller with hc-05 bluetooth module. microcontroller is powered via 7805 regulator. When 7805 is supplied the source voltage by a 9V battery, the ...
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1answer
65 views

AVR only runs when connected to ISP

I have a circuit set up as in the following diagram. There are 4 vertical power rails, the left-most 3 are supplied with 15v, and the right most 1 is supplied with 5v. The purpose of the circuit is to ...
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1answer
47 views

What should I have in my prototyping toolbox? [duplicate]

I have a few bread boards, microcontrollers, resistors, LEDs and so on—the stuff I obviously need to get anything done. But I'd like to step up my prototyping game, and when it comes to choosing ...
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1answer
64 views

4 pin switch circuit causes Arduino to reboot when pressed

I'm trying to copy an example that shows hooking up 4 pin switches to the Arduino (http://www.cs.uregina.ca/Links/class-info/207/Lab3/). The problem is when the button is pressed the Arduino reboots. ...
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1answer
66 views

op-amp ramp circuit gives half voltage

I have breadboarded out this circuit and it worked perfectly once. I tried to transfer it stripboard and I have had so success with it again. The schematic is below. The description of the circuit ...
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1answer
49 views

Is it possible to find through-hole, edge connector fingers?

I would like to do a bit of prototyping and have been wanting to leverage edge connectors as it would make my layout a whole lot easier. When using these, are you forced to get some kind of ...
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3answers
147 views

Understand Ground

I am confused regarding the attached image due to lack of understanding of ground. It's a basic question i.e. "How do I setup ground in my bread-board." Tried finding it but the confusion prevails ...
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35 views

H Bridge 555 Timer Votlage Drop

I am building the circuit presented at 4:45 in this video https://www.youtube.com/watch?v=iYafyPZ15g8 The problem is the frequency of the output of the 555 timer changes depending on the whipper but ...
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1answer
103 views

why have the same V before and after resistor?

I'm starting in electronics, and some measurements are surprising to me... Why i have the same V before and after a resistor? I've taken two photos to illustrate it, any advice will be very ...
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1answer
128 views

Why did my LED burn up? [closed]

My circuit was basically a push button hooked at 5 volts with a 100 ohm resistor. The push-button was directly below the LED. Why did it burn? Why didn't the resistor work properly? As you can tell by ...
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2answers
90 views

How to secure flimsy wires from RGB LED strip in Arduino Uno breadboard?

I just purchased an RGB LED strip to make my first 'non arduino starter kit project'. It has red, green and blue wires coming from the end of it, which I am trying to put in the breadboard sockets ...
7
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1answer
583 views

9-volt battery connected to transistor controlling LEDs with Arduino

I am trying to add a custom LED lighting setup to my desktop gaming computer. In this setup I want small sets of LEDs to be able to be turned on separate of other sets. This is so that I can turn on ...
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4answers
161 views

I want to have a 9v battery to give a 4.5v - 5v power supply? [duplicate]

I am trying to download a program on to my PIC circuit. As you know the pic isn't supposed to operate with anything larger than 5v. I don't have any access to a battery pack which could hold 3 x AA ...
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1answer
77 views

What's the easiest way to remove the power rails of a breadboard? [closed]

All of the breadboards I get come with an adhesive backing that, while keeping the metal rows inside the breadboard in, keep the power rails connected to the breadboard. I want to remove the power ...
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2answers
47 views

Reasons for a simulated circuit to oscillate when the physical circuit does not

I am building a circuit to drive a solenoid with current control. I am driving it with a circuit based on the improved howland current pump. Interestingly my simulated circuit displays a large ...
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3answers
79 views

Soldering SOT-23

I'm working on a DYI battery monitor project and the possibility of using an INA169 came up. That's a SOT-23 packaged component. I have minimal soldering skills so I'm looking for some advice: Can I ...
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2answers
59 views

Protoboard limitations when dealing with high impedance circuits?

I understand protoboards have several limitations for prototyping circuits. However, most information found deals with parasitic capacitance such as to cause problems with higher frequency circuits. ...
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2answers
101 views

why does the bulb light when I connect these two wires manually, but not when I plug them into the breadboard?

bulb on bulb off I am not changing the orientation of the bulb, I understand that makes no difference anyway since it's an incandescent bulb. As you can see, the difference in the pics is that ...
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3answers
150 views

Why are my components unconnected in the middle of the breadboard?

I have this breadboard: And I need my Integrated Circuit to be connected exactly like this (Don't pay any attention to the wires. Let's focus on the IC in the middle of the breadboard itself): ...
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1answer
86 views

Connecting DB25 socket to protoboard/breadboard

I need to connect a DB25 connector to a breadboard. One way I can think of is buying a solder-cup connector (e.g. http://www.digikey.ca/product-detail/en/171-025-103L001/225ME-ND/858135) and wiring it ...
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3answers
187 views

Jumper wire for thin connector pin / holes

I have a board with a Samtec SFM-115-L2-S-D-LC connector. This connector has 30 (15*2) pin holes, with a 0.050" / 1.27mm pitch, and accepts pins that are smaller than those used in breadboard / ...
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1answer
93 views

Arduino Project (Ultrasonic Sensor)

I've made an arduino circuit for my high school physics project. It uses an ultrasonic and an infrared detector to sense distances and operate a Servo and Leds and I am having troubles with the ...
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2answers
123 views

Strange behavior: NE555 + 7493 Ripple Counter + 4 to 16 Decoder

I have implemented the following with TTL 74LS chips: A NE555-based timer generates a clock signal every second The clock signal is fed into a TTL 7493 4-bit binary ripple counter. The 4-bit binary ...
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6answers
890 views

Why am I getting very different measurement results on a breadboard?

I have an AC to DC multiple output adapter. It has the following output: I set the voltage to 5V. When I measure the supplied current, I get 3.26A. Then I connect an output to it: When I ...
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2answers
144 views

Carrying your circuits in a bag without bending/messing up parts?

In my circuits lab classes, I might sometimes be working on two breadboards at once. I'll stick a breadboard or two in a plastic bag inside of a messenger bag to carry with me. Short leg components ...
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1answer
47 views

Using thin wire with a breadboard [duplicate]

I want to insert a wire into my breadboard for prototyping, however the wire is thin so it folds and frays when I try to push it into an open slot. Is there a particular type of pin I need to use in ...
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120 views

How to chose a diode for breadboarding?

I use Rasperry Pi / Arduino as power source (5V,3.3V) and for input/output (GPIO, Arduino headers). I reached a point when I realized, that what's in my mind needs diodes. I'm building a morse ...
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2answers
110 views

Circuit on a breadboard is not working properly

I have built the following circuit but it doesn't seem to work properly! The sound from the speaker should be maintained until the power is cut off but it is only maintained as long as the reed switch ...
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1answer
61 views

Is there an internal resistivity in buzzers?

I would like to know if there is an internal resistance in buzzers, and if yes, what could be the internal resistance for a cheap buzzer that can go up to 12V. Thank you
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1answer
91 views

Breadboard USB Mass Storage Device

I was wondering if there are any resources on building a USB mass storage device on a breadboard. I know it's not practical, but I thought it would make a fun side project and so I decided to do it. ...
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1answer
81 views

is there a solderless solution for component with pins 1.70mm apart?

I have a CAT4101 http://www.onsemi.com/pub_link/Collateral/CAT4101-D.PDF constant current LED driver which has 5 pins at 1.70 mm BSC apart. As I am a newbie I would prefer to use only a solderless ...
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3answers
281 views

Breadboard Resistor/Motor Not working

I'm pretty new to 'breadboard-ing' and I'm beginning to work with and need help understanding some basic concepts that I can't grasp. Basically I've made a basic circuit with a push button for an LED ...
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3answers
114 views

Why are components hard to insert into a breadboard?

I have just bought a breadboard, but I have notinced that the components are hard to insert into the holes (and sometimes only one pin go in and the another one go out, like a LED). In videos I see ...
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266 views

How approach breadboard layout using KiCad?

Rather than just piece together my breadboard layouts node by node, I'd like to be able to lay them out on the computer and optimize things by clicking and dragging rather than reconnecting jumpers ...
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2answers
346 views

Pin Configuration for Breadboard 3.5mm Stereo Audio Jack

I have this 3.5 mm stereo audio jack which can be mounted on a breadboard. Could someone please help me with the pin configuration? I'm using this audio jack to serve as input to the MT8870 DTMF ...
2
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2answers
98 views

How to use square pic controllers with breadboard

I've just started learning pic controllers and I'm collecting all the information. I've seen a lot of examples where people used breadboard with pic18. But I want to buy pic32 as the price is just a ...
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75 views

Gold flashed/plated pins and breadboard/jumper wires

I have several questions about gold flashed/plated pins. AFAIK, gold flashed pins have about 1U gold or less whereas gold plated pins have about 3U gold or more. Could one distinguish between gold ...
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4answers
340 views

How to make 9V battery clip easier to work with breadboard

I just recently started to play around with electrics. I use a breadboard as a playground and I have to plug in and out my 9V battery so many times that the clip is now broken. The tip of the lead ...
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5answers
4k views

Breadboard computer [closed]

Is it possible to make a simple computer entirely with breadboards and basic electronic components? Is it feasible to, for example construct a scientific calculator in this way?
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85 views

Voltage of Logic Low on ICs

I'm currently trying to create a 4 bit ALU using the CD4011BE quad 2-input CMOS NAND gate ICs. However, I'm having some trouble when creating the full adders. Sometimes, when the IC outputs logic ...
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1answer
156 views

How to connect input and output on Bistable Multivibrator

I built the circuit below on my breadboard. I've checked every connection and it doesn't work. The thing I didn't know how to do was connecting the output (a LED) and the input. (a button) I did ...
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1answer
97 views

Breadboard Jumper Shortcuts [closed]

This is my second question relating to this project. I am trying to make this project in the breadboard first, yet I am having trouble connecting all the resistors, and DIP switch connection with as ...
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2answers
128 views

What is the deal with input voltage?

Let me tell you right off the bat that I am new to electronics, more specifically the creating of electronics. I recently discovered a project that I would like to make, a pocket power supply(link at ...
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3answers
143 views

Non-inverting op amp on breadboard isn't working

I have posted this before and I have another question. I just can't get this working on a breadboard. I don't know what I am doing wrong. My voltage source is from an Arduino UNO which outputs a 5 ...
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1answer
166 views

Load Cell Data Problem - INA125P + Arduino Uno

I am currently reading data from my 30kg load cell with my Arduino UNO board and passing this data to my PC. I am using INA125P to amplify the voltage of my load cell and it is established on a bread ...