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Questions tagged [breadboard]

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

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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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43 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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126 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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29 views

Tesla coil circuit troubleshooting

Ok so we are making a tesla coil. Here is the circuit diagram we are referring: Now it worked when we first made this. The light bulb lights bulb when we bring it near to secondary coil. Then we ...
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3answers
87 views

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

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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2answers
64 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
69 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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47 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
75 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
32 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
818 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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92 views

electronically efficient breadboard wiring

I have checked stachexhange for my answer, but no luck. I hope I can be helped here. I am building ben eater's 8-bit, and have a general question about wiring: Is it better (less impedance/resistance)...
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49 views

Low Pass filter

I am making a Sallen-Key topology second order low pass filter with 10Hx cutoff frequency: I am using the LM248 op amp. The resistor and capacitor values are specified in the drawing. However, when I ...
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3answers
77 views

TTL IC logic high output doesn't reach high enough voltage

I've been having a problem trying to build a breadboard circuit. The problem being, that some IC high outputs doesn't reach a high enough voltage, staying around ~2V. That is not sufficient for a ...
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1answer
1k views

Is this a correct way to route current away from breadboard?

I've recently grown interested in electronics and robotics, so I wanted to move my contraption using a servo motor. A 555 chip creates a PWM signal for servo for positioning, and I control the servo ...
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1answer
47 views

Can I use the oscillation frequency equation for this circuit?

I'm not really sure if this is a question that can be answered so I'm sorry in advance if it isn't. I've just started doing electronics on a breadboard and I'm making a "Mini Strobe Light" from Jaycar'...
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61 views

Perfboard dimensions

I would like to design a 3D printed enclosure for my project. I am using these perfboards from amazon. I could not find online the dimensions for the mounting holes. I know I can use a calliper, but ...
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1answer
103 views

Arduino UNO disconnects from computer when connecting it to a breadboard from specific holes

I am a complete beginner in electronics; I started learning using Arduino yesterday. There is something strange happening with the Arduino UNO board. The Arduino board is connected to my laptop and ...
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4answers
55 views

simplest way to create an activatable alarm on a speaker?

I have made a circuit that produces a 3.3V high when its active and 0V when it is off. Now I would like to extend it with a speaker that plays some sort of alarm (although it shouldn't be too ...
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1answer
97 views

Led on breadboard burned out why?

Please be kind as I am fairly new to electronics. Anyways, from what I read on multiple forums the rules are fairly straight forward, but I am puzzled as to why my led burnt out. So I connected the ...
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0answers
54 views

LEDS on Traffic Circuit using 555 Timer Don't Light up

Here is a picture of the circuit and circuit we built on the breadboard. We used every component as instructed and built it as such. The Green LED lights up for about 7 seven seconds then turns off, ...
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2answers
116 views

Power issues on TTL circuit

I am building a homebrew 8-bit computer on breadoards and PCBs with TTL logic IC's (LS, HCT and ALS families). This is a small portion of the circuit (3 modules): I'm using an ordinary phone charger ...
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1answer
28 views

Unable to supply FONA 32u4 3.5 v through circuit

I am relatively inexperienced when it comes to circuitry and electronics. However I am trying to create a simple device in which with a press of a button, the device turns on and calls a specific ...
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2answers
176 views

741 Op. Amp.: Inverting input connected to output (pin 2 connected to pin 6). What does it mean?

simulate this circuit – Schematic created using CircuitLab I am a newbie electronics students. My question is, what does it mean (what happens) when you connect pin 2 to pin 6 on a 741 op. ...
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1answer
231 views

Zero crossing detection circuit correct?

I am working on a DIY AC dimmer circuit with arduino. This project is part of the AC dimmer circuit as mentioned here Since, I was stuck in so thought of retracing my steps and checking each part of ...
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4answers
2k views

AND Gate Stays Open

I have a very simple circuit on a breadboard with two push-button switches, an AND gate (74LS08), and an LED. I have the two switches hooked up to pins 1 and 2, while the LED goes from 3 to ground. ...
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2answers
53 views

Magnetism and my breadboard

So today I assembled a little circuit to test my new shift registers (74HC595). I took three breadboards and connected them as shown on the drawing here. It is supposed to work as a user ...
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2answers
118 views

555 Astable Timer produces incorrect period/frequency

I am building a 555 astable timer circuit for a course which must match the BPM of a song. The song has a BPM of 104, which requires a timer frequency of roughly 1.733 Hz. The circuit looks as ...
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1answer
74 views

Why doesn't my bench PSU read current on a breadboard?

I've recently purchased a cheap eBay DPS3012 DC-DC converter supply. I intend to use it on breadboard projects. The "problem" is that the meter reads a 5V output, with no current being drawn and ...
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1answer
2k views

What breadboard simulation software is this?

I'm not familiar with what software is available and cannot recognize the origin of this diagram. Does anyone know what software this is? I'm only guessing that it can perform simulation; it may just ...
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2answers
1k views

Circuit to Breadboard [duplicate]

I'm currently working on a project which requires me to test the functionality of TTL logic gates by making use of diodes and resistors. To do so I must first place them on the breadboard and then ...
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1answer
110 views

Noise everywhere on solderless breadboard, could the DC-DC converter be the source?

I am using a solderless bread to prototype an analog sense -> 8 bit digital circuit. It's messy Has Hi gain sensing opamps sensitive POTS I have 20mV of noise everywhere, even when I am connecting ...
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84 views

Is the grounding of the breadboard common used? [closed]

Is the ground of the breadboard common used ? I mean can i connected two different voltage producer (voltage supply) ground pins in the some negative hole in the breadboard?
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2k views

How adding a jumper switches the power between 5V and 3.3V?

Below is a snapshot of MB102 bread board powersupply that can provide either \$5V\$ or \$3.3V\$ on either rails. We can switch between 5V and 3.3V by adding a jumper as shown. I'm just wondering how ...
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2answers
131 views

Connecting Led in Series with Parallel Switches

I created a diagram for a circuit that i am trying to implement. I have attached my circuit diagram and have been trying to implement it but still have not got it to work. I've checked all the wiring ...
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3answers
78 views

Need help choosing a power supply for a breadboard [closed]

Hey i want to (in the long term) start experimenting with remaking modules from old analog synthesizers. For example remake an oscillator from a Minimoog or a chorus from a Roland Juno-60 or something ...
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5k views

What kind of rubber “melts” plastic?

I know this should probably be posted in a chemistry exchange, but I figured the parts are pretty standard electronics equipment that the question might be more relevant here. So a couple of ...
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1answer
195 views

Why don't single row circuits work on a breadboard? [duplicate]

I am fairly new to electronics, and whilst messing around with a simple LED circuit on my breadboard I noticed that when connect my resistor and LED on two separate rows, the LED lights up as it ...
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1answer
36 views

Relay circuit not working

I have connected my relay with a nodeMCU so that when I give commands to relay through nodeMCU the led connected to relay gets powered up. But after proper connection also it doesn't power up.
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2answers
77 views

How to check if a device is compatible with a breadboard?

I am just in the process of purchasing components for a control systems project but I am having trouble selecting a barrel jack that is compatible with a breadboard layout. I'm not sure if there is a ...
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1answer
82 views

Breadboard connections

I am new to breadboard electronics projects. I am looking to do this project but am a bit lost on what all I need parts wise. This is my current parts list: ...
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1answer
75 views

How to hook up a fan to this switching circuit

I am trying to build a controlable fan with a raspberry pi and I have found the below circuit for a switching circuit to allow the 12V power to go to the fan My question is how do I then hook the fan ...
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2answers
174 views

Jumper wire solution for short header pins /

I installed header pins that fit into a feather microcontroller, but since they are not double sided header pins, the top side is too short to attach normal jumper wires to. Is there some clean, non-...
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2answers
85 views

ADC readings problem: built in vs external ADC unit

Why am I getting these (mostly) good readings with the built in ADC of the Arduino Uno (10 bits resolution): and these scattered values (same analog sensor used) with the external LTC1418 ADC (14 ...
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2answers
347 views

Common Mistakes Using Breadboard: What's Wrong? [closed]

I didn't wire my circuit correctly and burnt out all my LEDs. I put the resistor's nodes in the same 5 hole row and put each terminal of LED in separate rows. The LED lit up, but soon after blew up. ...
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1answer
144 views

Photo resistor night light not working

I am completely new to this stack exchange and to electronics and general so please keep that in mind if my question is not up to par for this site. I've attempted to make a night light using a ...
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1answer
88 views

How to build a circuit in a breadboard? [closed]

Basically, I want to build the following circuit on my breadboard to compare my analytical and my experimental results. The power source is going to be a signal generator. How can I set this up? I am ...
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2answers
57 views

Switches implementation Help [closed]

I am an aspiring student taking a robotics course. I currently have a problem about a circuit I am currently making. This circuit looks very similar to this one here: Falstad actual circuit: http:/...
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1answer
72 views

PIC16F84A wont run my program on a breadboard

I have written a program on the PIC16F84A and it seems to work perfectly on the PIC testing board. After i had created the program and assembled it onto the PIC, i placed it onto the breadboard and ...