Questions tagged [breadboard]

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

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103 views

How to check whether an IC has gone bad or not?

My Question I have unfortunately, had an incident with my the 74LS08 (And Gate) IC. When I accidentally powered it incorrectly, the IC started to heat, very quickly. I was powering it using an adapter ...
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What would I use to distribute power in my project?

I want to power 10 SG90 servos, which each operate at 4.8v or 6v and need over 1 amp in order to start and use 700ma max during operation (I think). When I look at a kit like this (https://www.amazon....
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1answer
56 views

Making connections sturdy [closed]

TL;DR: How should I connect the LED strip 3 wire JST connectors to the breadboard so they are less likely to fall out Found the answer I think: Terminal Blocks How should I connect the LED strip 3 ...
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Similar circuit not working because of wire [closed]

I've setup a series circuit with an LED and a 1kohm resistor. If I plug the led positive end (longer end) directly to the power positive rail, it lights up. But if I connect the led positive end to ...
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3answers
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How does my breadboard circuit diagram look? Am I going to explode myself?

I'm working on my first Arduino project and I thought I picked something simple enough. But before I set my breadboard on fire or ruin any of my components, I wanted to make sure my plan made since ...
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Breadboard and Circuit Confusion

I'm still a noob to this stuff, and I've run into a problem I can not explain, or understand. I will need help translating / editing this into a real question for you all, so please bear with me. ...
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45 views

SN74LS26 2-input NAND gate. No output

I purchased SN74LS26N quadruple 2-input NAND Gates chips for my circuit. Before I insert any chip into circuit I test it on separate breadboard. So I did with this chip and I get NO output when my ...
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1answer
68 views

Power supply module on breadboard giving too much voltage

I'm currently following the tutorial "Electronics Fun Kit" by ELEGOO. The goal is to connect the power supply module with the breadboard in order to provide a 3.3V / 5 V source. After connecting the ...
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How to connect the ground in this common base schematic to a breadboard? [duplicate]

I just want to know how do I connect the ground in this common base circuit. I know how to connect two DC sources but I'm confused on how to connect the ground. I have adept knowledge about the ...
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199 views

SN74LS93N is not counting as expected

I've got SN74LS93N chip that I am trying to get to work. I connected it as per datasheet but instead of counting, all outputs are flashing with clock signal... Video to circuit I read online and ...
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49 views

Breadboard ATmega328P@internal8MHz upload verification fails

I have a breadboard set-up with an ATmega328P running with the internal oscillator at 8MHz (3v3). I have burned the following fuses: H=0xDA, L=0xE2 and E=0xFF I am using external power and ...
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96 views

Is this network of resistors in series and parallel, the way I intended?

https://www.circuitlab.com/circuit/gu5zh6pdvj8q/parallel-and-series-question-circuit/ simulate this circuit – Schematic created using CircuitLab Do these circuit schematics accurately ...
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Looking for the name of a 3-input logic gate

I am looking for a three-input, one-output logic-gate from the following truth table: $$\begin{array}{c|c|c|} \text{C} & \text{B} & \text{A} & \text{Output} \\ \hline 0 & 0 & 0 &...
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60 views

Transferring Circuit to Solderable Mini Breadboard [closed]

I have a simple wifi temp/humidity sensor I've set up on an adafruit breadboard, and I'd like to transfer to a perma-proto type board, but the solderable boards I have are a slightly different layout ...
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41 views

Measuring power consumption of Wiimote adapter not working, what am I doing wrong?

When I try to measure the power consumption of various Wiimote accessories, the multimeter only says 0.0mA, so I wonder if I'm doing it wrong. Here's how I measure: A more detailed explanation: ...
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1answer
31 views

Connecting breadboards with different batteries to a single switch

I have three different breadboards with ten LEDs & resistors connected in parallel. All three are powered by a 9v battery. I was wondering if there would be a way to wire all three batteries to a ...
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102 views

~150 WS2812b LED's with Pi Zero and SN74AHCT125N

I'm planning to control about 150 WS2812b LEDs with my Pi Zero and a 5v 11a power source (PC molex connector). Following this guide: https://www.thegeekpub.com/15990/wiring-ws2812b-addressable-leds-to-...
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120 views

What does 'ground' look like on a breadboard?

Given the following circuit: What would this look like on a breadboard? For example, what is 'ground' on the right? Is there a particular 'component' that can be used in a breadboard to act as ground ...
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79 views

Wiring colors for 'intermediate' connections [closed]

It seems to that red is the color usually used to connect to the positive terminal and black is usually used to connect to the negative terminal. However, I have seen numerous other colors as '...
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Hobby breadboard wiring guidelines to stay within legal RF/EMI limits?

Assume a middle school or home hobby lab with a bunch of breadboards, jumper wires, and 3.3V microcontrollers fast enough to toggle IO at RF frequencies (if not at the fundamental, at lower harmonics ...
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127 views

How to mount a narrow component on breadboard?

I have a narrow component with two rows of pins. The pins have the right pitch but the rows are too close together to be placed over the non-conducting gap between E and F rows of the breadboard. The ...
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2answers
86 views

Why do LEDs have/need positive and negative nodes to function whereas say resistors don't? [closed]

I'm very much a beginner experimenting for the first time with electronics, and I'm still trying to grasp the basics. On my breadboard, my LEDs have to be setup in a very specific way for them to work,...
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70 views

Monostable and astable on breadboard

I am trying to fit all three modes on of 555 timer on a breadboard. But no matter what I do I am not able to get it to work on a single breadboard. When I move the circuits on different breadboards ...
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1answer
36 views

Beginner Analog Multiplexer Wiring Help

beginner here, searching for some guidance as I set up my first multiplexer. My breadboard was wired as follows: The T4 refers to my Teensy4.0 microcontroller, its hooked up to the breadboard ground ...
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86 views

I swapped +5V and ground on a chip, how to know if the chip is dead?

Well, I accidentally connected ground to the +5V pin and vice-versa on a (W65C22), I don't know how to be sure that I didn't burn the chip. One thing I was noticing is that when the cables were ...
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39 views

Will using magnetic base test indicators with breadboards cause electrical interference?

The situation leading to the question In the Quick Tips #8 // Precision Helping Hands YouTube Video, a "helping hands" with various names such as "Magnetic Base Adjustable Metal Test Indicator Holder"...
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165 views

Logic DIP switch console breadboard

I want to use a single breadboard slice to build a console for a mini-computer project. It will have 28 or more parallel control and data lines, each with the following features: state indicator LED ...
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1answer
61 views

Breadboard circuit with PN2222 transistor, LED constantly on

I am trying to build a breadboard circuit for my class assignment using a PN2222 transistor. The LED light is constantly on, without pressing the switch (button). The directions of my assignment ...
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1answer
42 views

How to prototype current sense circuit on bread board?

Connectors on a breadboard have some resistance, when prototyping a current sense circuit with a 0.01 ohm resistor can the connectors resistance affect the circuit? and if yes how can we prototype ...
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1answer
122 views

Inverting op amp design saturates at a fraction of power supply

I have built a simple inverting op amp. I am applying a 1 Vpp sinusoid at 10 Hz to a design with ~4.7x gain. The resistors I am using are 47kOhm and 10 kOhm. The op amp chip is the LT1222, and I am ...
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110 views

Circuit Diagram to Breadboard

I'm really confused on how to implement this circuit diagram on a breadboard. The short wire indicated with v1 is the confusing part. I tried to make it on a breadboard but I can't seem to get it. Any ...
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1answer
94 views

1602a LCD - Voltage drops to zero when both VSS and VDD are connected

I'm currently trying to connect a 1602a LCD screen to an ATMega328P MCU: As you can see, I use an Arduino Uno for power supply and as ISP. However, when I connect both the first (VSS) and second (VDD)...
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1answer
58 views

Insufficient current using Elegoo UNO R3 and breadboard

I'm completely brand new to electronics and just bought a breadboard kit to try and get my feet wet. I have a 9V battery and I'm trying to fire up a green LED. I have a 330 Ohm resistor in series ...
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3answers
143 views

Breadboard and XOR gate not working

simulate this circuit – Schematic created using CircuitLab 70I am trying to make a circuit in which the switches will determine the outputs for the xor gate however when i used the switches it ...
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1answer
46 views

Switch that change its state with a signal of some seconds

I'm making an IoT project for a friend, but I need some tips: I want to use an old mouse sensor and convert it to a movement sensor (just for a door) and if it's activated, a second device (an esp8266)...
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181 views

How is the common anode 7-segment display in Ben Eater's setup working?

First question in this community, and I'm a beginner when it comes to circuits. In Ben Eater's video on using an EEPROM for combinational logic, he uses the output of an EEPROM to drive a common anode ...
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2answers
243 views

Simple Op Amp Non-inverting Amplifier Circuit Not Working

I am only just starting to learn about circuits and electricity, so please bare with me. I am attempting to build the circuit pictured below: And this is my rendition of it: Here are the parts used:...
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1answer
51 views

How increase pressure sensor breadboard sensitivity?

I build a pressure sensor breadboard according the schematic. It works, but has quite low sensitivity - it shows some pressure only after big pressure is applied. Is there a way to increase ...
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4answers
2k views

Simple fuzz pedal using breadboard

Complete newbie here. I've been trying to reproduce a simple fuzz pedal using breadboard. Here is the scheme: And here is the current state of my breadboard: The only sound I hear is white noise ...
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1answer
66 views

I have a 2 A 12 V regulated power supply and I want to use it to emulate a 9 V battery for a breadboard

I have a 2 amp 12 volt regulated power supply and I want to use it to emulate a 9 volt battery for a breadboard. However, I need to protect the power source and the components used in my breadboard ...
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3answers
50 views

Why different battery voltage does not affect LED light-up time?

I have this clock circuit build along with de-bouncing circuit - https://www.youtube.com/watch?v=6O6xdOexSCE (this is based on Ben Eater's 8bit computer). But I'm using 9v battery instead of 5v one. I ...
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2answers
332 views

The art of using breadboard

I am making a circuit for converting analog to digital signals using an ADC0808. This IC has 28 pins, and my circuit also includes a 555 timer and some LEDs to display the output. The high number of ...
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3answers
155 views

How to convert 8-bit information containing MIDI note, to square wave signal using basic chips and components?

Using basic electronic components (capacitors, transistors, etc) and/or chips (555, 74 series, etc) how do I convert from: Input: 8-bits containing the binary representation of a MIDI number "...
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4answers
2k views

Can I run 125kHz RF circuit on a breadboard?

I was wondering if making a low frequency RF circuit on a breadboard is viable.
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69 views

Arduino pin connection basic

In the Arduino Uno's basic manual, connections for fading led are given. They have connected led on breadboard. The positive of led is connected through a resistor to the pin no 9 (pwm) and negative ...
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1answer
227 views

Finding the broken cicuit in an Xor Gate

I am new to this particular stack site but I feel that this is the most appropriate place to ask my question. -Background- I've been following an online web course called Nand2Tetris that takes you ...
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366 views

JK flip flop integrated circuit (7473) toggle malfunction

I built a state machine using JK flip flops, I tested it but I kept getting seemingly random results. I decided to test each jk flip flop individually. Here is the schematic for my testing: simulate ...
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1answer
89 views

Electronics project

I am building a project for my college work which is used to detect the leakage of gas in house. The schematic diagram is given below. 1: I removed the rectifier part because I am using a battery. ...
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1answer
106 views

Connect TFT LCD screen with flex band to breadboard

I'm asking for clues on how to do this, I didn't found much over the internet as everybody buys their LCD screens with a mounting to the breadboard of as a shield for arduino. The TFT screen I bought ...
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1answer
968 views

my breadboard simulation doesn't work properly

I'm trying to simulate the below circuit on a breadboard but it seems I'm missing something because the numbers don't seem to be correct. Here is the circuit I am trying to build: Here is my ...

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