How can I build a Voltage control circuit?

I want to build a circuit that has a Potentiometer, a switch, and a three digit display, that will give out a voltage of between 0.1-24V so that I could connect it to my breadboard. I'm not an electrical engineer (yet) so I don't know how to build it myself. Can someone give me a schematic?

Asked by yonch 6 years ago

Should I buy a breadboard? Answered

Half the stuff i make fails so should I buy one? And want are the benefits?

Asked by TNEN 8 years ago

Large cheap breadboards?

I need some large breadboards for free or very cheap. Is there a company that gives free samples, or someone here who has some they don't want? I also need a way to cut them.

Asked by XOIIO 9 years ago

make your own breadboard?

Is there a way to make your own breadboard? could you get 2 pieces of thin balsa, drill appropriate holes insert a layer if tinfoil between them? how do you do it???(if there is even a way) thanks for any help i receive regarding this topic

Posted by ledzep567 10 years ago

How do you set up a power switch on a breadboard?

I figured you just run the battery's ground to ground, then have the positive from the battery in a row on the board, then you would switch this to your rail. The problem is that the battery got HOT as hell in a minute, so I must be doing something wrong. Took a peek at another device and it looks like the switch is actually switching ground... what do I do? My switch is a little vertical slider switch that has two positions, and three leads represented by black, red, then green wires.

Asked by prismspecs 6 years ago

On the breadboard Arduino, what's the difference between that and the duemilanove? Answered

What exactly is the difference between making the breadboard version found on arduinofun in thier kit, and the duemilanove? Besides the usb part?

Asked by volkermord 8 years ago

Needed: a trick to debug a circuit on a breadboard - (The Spaghetti Incident)

The situation: I'm prototyping a circuit with a 14-legged logic IC on a breadboard. What happens: The picture tells it all: The breadboard looks like a Spaghetti Incident. What a mess. It's hard to find the right holes between all the leads sticking out, and avoiding shorts is even trickier. And of course: The circuit doesn't work. Not suprising considering the chaos. No biggie, but debugging a circuit on such a breadboard is a real pain! So please: Share your tips / tricks / magic to keep a proper and readable circuit on a breadboard. Thanks! Ynze PS: The circuit is not very complex btw. It's a solar engine, with one logic IC (NAND gates) and about 15 other parts. The circuit does contain feedback loops, which make it a bit trickier...

Posted by ynze 5 years ago

Looking for Eagle file for standard breadboard power.

Hello;   I am trying to find an Cadsoft Eagle .brd file. I want to plug boards into a standard breadboard, for power. I want to plug onto the thin side. It seems to be a metric measurement, even though it is 0.1" hole spacing. Or if someone has the spacing info for the pins? I measured 4mm on centre, then 40mm to 51mm for the far row. So it would be on the left or right of the breadboard. I always round ground at the outside, and 5v in the middle. So swapping ends will work. Thanks, and I will keep looking Mick M

Posted by MickM 7 years ago

Should all grounds go to the same negative bus on a breadboard? Answered

Whenever I see circuit diagrams they just show a ground off some components. When I'm designing on a breadboard should all of these go to the same negative bus on my breadboard in order to function properly? I've got one positive and one negative on each side (standard 6" Radio Shack model). Also, I would assume that a series circuit would be for those instances when you have no negative bus at all and need to ground back into the power supply as well? Thanks!

Asked by giantjamsandwich 7 years ago

I will paypal someone $10.00 dollars to draw this in breadboard fashion for me!

Hi, I really need help. I've been working on this dern motion detection alarm and am having problems with the delay circuit. I think I have assembled it right and it never works. I have completely re-done it twice! What it is supposed to do is once power from the relay is sent to the 555 timer it will impose a 1 minute delay before sending the power to the alarm/horn. This gives owner adequate time to enter code to disarm. The relay part of the circuit works fine and sends power to the 555 timer and latches as it should. However, the 555 timer never sends power out of pin 3. Could someone please, please, please draw the attached schematic in breadboard fashion so I can double check everything is assembled properly? I would really appreciate it!!! Anyways I will paypal someone $10.00 dollars to draw this in a breadboard layout for me!

Posted by swilus 6 years ago

Circuit works when I poke a connection, but the connection is sound

So, I've started playing with vfds since this weekend jaycar (if your an Aussie) is selling 11 digit, 10 segment vfds for $1.90. Cheap as :P. It runs off 12v for the segments, 4.5v for the filament. I'm using 3 4094s to control the segments and an atmega168 to control the 4094s, using 3 transistors to up the voltage between the 4094s data, clock and latch pins and the the atmega I/O ports. I'm pretty sure everythings hooked up correctly but, as with most projects, it's not working first time :P. Here's the thing, it works if I poke either the green or brown connection with just one probe of my multimeter/finger it works. My first thought is that i've hooked up my transistors incorrectly, the base is 5v with a 2.2k current limiting resistor, and the collector is 12v with a 5.1k current limiting resistor. To much? I blew out a resistor in initial testing and it got me a little worried :P Thoughts?

Posted by greendude 9 years ago

USB breadboard

Whats the best way of connecting a USB typeB pcb mount socket to a beadboard?

Posted by daveob 10 years ago


This is some of my breadboard circuits. I just got it in the mail so this is my first project. Its not supposed to be anything it just looks cool when its lit up.

Posted by DELETED_Nicker987 10 years ago

Why this led circuit doesn`t work? Answered

Hi everyone, you see build this infrared-led circuit for a school project (am 16 and not in america so sorry for missespells, like that, pretty sure that missespell is not the word) This are the parts: Breadboard 3v Led 3v Ir receiver (with 3pins) Switch Jumper wires Can please tell me why doesn`t work??? What i miss?? Above some pictures.

Asked by Ik0 8 years ago

Odd Breadboard Question

Hi All  I am brand new to hobby electronics and would love one day to be able to create the endless amount of cool Instructables but I have ran into a problem on my first attempt at putting theory into practice and would really appreciate any help. I have made two diagrams / images showing the circuit I made I have attached them to this post. I am using an Arduino Uno as a power source.... I ran a 5v positive from the 5v pin on the Arduino using solid core jumper to the top of the breadboard onto the positive row / rail and a negative / ground jumper to the bottom of the breadboard. In the middle of the breadboard I placed a 1k ohms resistor bridging the gap / grove/ divide and ran the positive feed through it and on to the anode leg of the LED. The cathode leg of the LED was connected to the negative row / rail completing the circuit. All works as it should because of the high resistance from the resistor the LED barely lights and is green as it should be. So without using a multimeter I know and can see the resistor is clearly working. However if I move the resistor so it's still on the same line / row as it was but no longer bridging the gap the LED goes super bright and turns yellow which means that the resistor is no longer working which I can't figure out why because I know there is definitely current flowing through it given the extreme reaction of the LED. I vaguely remember reading somewhere on these forums that Fritzing is not liked very much so I hope no one minds but to help explain what I mean above I have created two diagrams / pictures using Fritzing. The images diagrams shows the resistor "bridging" and working and the other shows it not bridging and therefore not working. So my question would be why given the resistor has current flowing through it does it not work unless it's bridging this middle divide / gap / grove? It makes me think I am missing something really stupid that everyone should know about breadboards but just seems really odd to me. Many Thanks Rab

Posted by belfastrab 3 years ago

FREE Schematic publisher(also includeds breadboard and PCB view)IN ALPHA

I did a search and didn't see it on this site anywhere, but I see a huge need for a number of the members here to be able to draw schematics and even simulate a breadboard or PCB. This software is free(but it is still in ALPHA testing). I have no affiliation with this site so I can only answer questions about usability from my opinion. For what a lot of people need on this site to help make "instructables"  that have electronic curcuits in them I think this is perfect. Especially if you can't afford high dollar software, plus if you're not an electronic engineer this software will teach you proper terminalogy and proper drawing designations as well. From what I know, all parts on the program are editable. So if you need a green 3.6v LED you can edit the one that comes default on the program and save it in your tool kit and use it for another project later. Hopefully everybody sees this. If the Mods know of a place to put this where it may be more accesible and visible to everybody here, please move it. Here's the link to find the software. They have it for Windows, Mac OSX, Linux 64 and 32 bit Enjoy PS, don't forget this software is in Alpha, so contact the devs and tell them if you have problems or you'd like to see changes

Posted by navyredman 8 years ago

(newsletter) Ambidexterity, Breadboard Tips, All-Weather Bike Helmet...

Jan 29, 2009 Sign-up for this newsletter: function openSubscribePopUp(src){ var emailValidate = /\w{1,}[@][\w\-]{1,}([.]([\w\-]{1,})){1,3}$/ if(emailValidate.test(src.value) == false){ alert("Please enter correct email"); return; }"/newsletter/newslettersignup?email=" + src.value,"newslettersignup1","status=yes,scrollbars=yes,resizable=yes,width=420,height=250"); } Welcome back! The Craftsman Workshop of the Future Contest winners have been announced! See who won the $20,000 grand prize, and the $500 runner-up prizes!Have some nagging issue that's holding up your latest project? Check out our new Answers section and tap into the Instructables community's pool of knowledge! It's cold up here in the northern areas and we want you to show us some great ways to fight the chill in the Stay Warm Contest. Win a brand new sleeping bag!These are the final days to reuse and recycle a plastic bottle for the Tap'dNY Keep the Bottle Contest. Enter by Sunday night to win a Voltaic solar-charging backpack! Leyden jar of DOOM! by nickademuss Build Buoys from Plastic Bottles by Patenteux du Nord Make a Postal Scale from Old CDs by Phil B LED-Paper Craft Lamps by mike_b See who won! Closes for entries this Sunday! Recycled Plastic in Plane Design by petercd Wine Bottle Lamp by reclaimagination Convert a Generator to Run on Propane by Rainh2o Ten Breadboard Tips and Tricks by klee27x Turn a Laptop Screen into a Mirror by MidnightSon Make an Easy to use Tape Dispenser by Creativeman The Quest for Ambidexterity by Mother Natures Son Make a Lego Valve Stem Cap by imaseahawksfan Share your best way to fight the cold and win a sleeping bag! Check out our latest feature! Make Home Energy Improvements with the Government's Help by zieak DIY Choreographed House Lights by prabbit22m Real-time Web Based Household Power Usage Monitor by jasonT All-Weather Bike Helmet by jeff-o Now go make something awesome, and I'll see you next week! - Eric Sign-up for this newsletter: function openSubscribePopUp(src){ var emailValidate = /\w{1,}[@][\w\-]{1,}([.]([\w\-]{1,})){1,3}$/ if(emailValidate.test(src.value) == false){ alert("Please enter correct email"); return; }"/newsletter/newslettersignup?email=" + src.value,"newslettersignup2","status=yes,scrollbars=yes,resizable=yes,width=420,height=250"); }

Posted by fungus amungus 9 years ago

What's a breadboard? Answered

I take it a breadboard is the white board in the pictures. Beyond that, what is it?

Asked by WildTurkey99 1 year ago

What's a good program that allows you to convert electric circuit schematics to breadboard drawings automatically?

I have very little experience with working with breadboards. I've read tutorials about using them but I want to know if there's a program that could convert any electric circuit schematic I make into a breadboard equivalent automatically.  After all, it would be nice to be able to work with my stuff on breadboards & achieve results, not put in stuff & find out it's not working because I don't know much & how to fix it.

Asked by mosquemouse 2 years ago

(You probably get these all of the time) I need help with a schematic! Answered

I'm sure the instructables community is going to facepalm when seeing this, but here I go. I wanted to make this It is a lie detector that is supposed to be done using a kit. However I wanted to try my hands at breadboarding so bought all the parts and a breadboard instead. I have looked everywhere, and all I am able to find are indexes of common schematic terms or pictures. If anyone would be willing to help me I would be forever grateful. I have knowledge on how to use a breadboard, and I have made simple LED circuits using a resistor. But when you start having to connect multiple parts to a bus I get lost. Thanks in advance!

Asked by soapdude 7 years ago

How to install electronic components?

Hello. everybody. I'm new to this electronic hobby thing. I'm trying to make a simple sound amplifier, purchased all components, have the schematic of the circuit BUT I have no idea how to install them on a protoboard (breadboard). I've one of these: I don't know how to use these boards. Are those circles painted with copper? How do I turn this into a circuit board?  Eventually I lost my mind and started wiring up the components but it's really messy and time consuming. I couldn't get a mainstream breadboard so I picked the one above, but it seems to me that it's just a support for the component and the wiring part is still inevitable. I can't find tutorials on this topic, heck I don't even know how to search this topic. It's very annoying. Please give me some feedback. Thank you.

Asked by cantleave 3 years ago

getting started in electronics or learn to make electronic gadgets

See all the electronic projects do i learn about electronics like in the projects used here from the lamps made with leds to robots .? are they from books? classes are out to far away and problely a bit pricey right now? ?

Asked by Eyewondery 8 years ago

I have a problem testing the DC Motor Controller,please help if you can! Answered

Hi! I want to build a robotic arm for a project,but I got stuck while testing the motor driver on the breadboard. I have followed the instructions from this instructable: and I connected the pnp transistors the right way(the author confirmed in the commentaries a long time ago) and also like in the diagram. The problem is that when i turn the power on to the circuit,the motor starts to spin(slowly but it has a snail gearing reducer) and the first mosfet is getting very hot very quickly and also if I try to control the circuit by touching the first contact with a positive voltage it doesn't do a thing.I even tried doing only half of it. I tried to reassemble it again many times,changed the transistors with other new ones,checked the connections and after numerous voltage measurements I concluded that the problem is that when I am powering up the circuit for some reason between the pnp collector and ground there is a 12v voltage and the voltage continues all the way to the resistor to the far left,although at the resistor the voltage is dropped to about 7v. I also simulated the circuit in proteus before i bought the parts(i need 6 good working drivers) and it worked fine. It may be a stupid mistake,but please help me if you have any idea what the problem might be!

Asked by VladM43 5 months ago

Breadboard (again)

These are some new pics of my breadboard circuits. I also have figured out how to wire my 7 segment LED.

Posted by DELETED_Nicker987 10 years ago


Question Body: give us more detail on your question...

Asked by Charlie1947 1 year ago



Asked by Muna ATALLAH 7 years ago


How do I space pin headers apart to use the finished PCB on a breadboard?

Asked by suzi333 1 year ago

Music playback with breadboard.

Hello all. I want to create a simple music playback device. I wanted to be able to program a couple simple songs (MIDI format?) and when it receives an infrared signal, it begins to play through small speaker (small enough to hear about 10 ft. away). I was thinking this could be done through a breadboard. I am familiar with using breadboards but everything else I will need explained well. I appreciate any help I could get. Thanks.

Posted by TimArchy55 10 years ago

Breadboard Circuit for a servo?

I am looking for someone that can tell me what to do on a basic electronic breadboard (what timer, resistors etc) to be able to create a circuit to drive a servo. Basically i am an over ambitious art student that wants to use a a servo on a timer to alternate between 0 and 90 every 5 seconds or so (i haven't decided what time i want it to be but figured i could adjust it?) I am learning about these things on a DIY basis but as i am short for time i want to get it sorted. Any help would be appreciated.

Posted by GF88 8 years ago

What's wrong with this wiring?

I've finally decided to undergo my first real electronics project - building a quad-NAND synth ( as per ). It's basically a simple oscillator run through each NAND gate of a 4000 series CMOS IC, fed into each other for manipulation. This is also my first time actually translating schematics to a breadboard, which I've attempted haphazardly - see my attached image. My questions are the following: How many errors have I run into? If I were to test this oscillator, how would I go about installing the audio jack? Am I grounding this correctly? Thanks!

Asked by cshields1 7 years ago

How does the circuit in a music synthesizer work?

I'm a beginner. What i meant by how does the circuit work is, how does the capacitor work in relation to the resistor and what do i connect and what parts do i connect to what/where? I need everything in sequential  order and in simplest form please.

Posted by Naps 7 years ago

Quick question

Hi, I need help. You see the street I live in has more cats than, well the musical cats,  and seeing as my garden seems to be they're preferred  choice for going to the toilet, I decided to build a motion sensing water sprayer. So off to Amazon I went and purchased some PIR sensors, a solar pump with a DC connection, bread boards wires and batteries and chucked it all together. Now the sensor will light an LED no problem but when I switch in the pump I get nothing. I read on tinternet that transistors can be used to up the juice but I was already far beyond my knowledge of circuits, components and the like. I even tried looking at sketches of PIR sensors to transistors, but after weeks of trying I'm no closer and have nothing to show for it but a headache.  If anyone can help and describe to me (in child like, basic terminology) how I wire up a transistor to a PIR and then a 4-12v 3.5watt pump that would be just super.  Or at-least put me out of my misery and tell me it's not doable.  Thanks.

Posted by Daveuppercut 3 years ago

why my circuits on breadboard are not working? Answered

After uploading the program to the arduino , my led over the arduino is working according to the code written, but the circuit on the breadboard is not working why?

Asked by sanglap patra 1 year ago

Breadboard Alert!

I'm not sure how much they normally run for, but sciplus has breadboards for sale for 4 and 8 dollars. You can use them to prototype your entry for the LED contest!Check it out!

Posted by Weissensteinburg 10 years ago

Are Printed Circuit Boards and Breadboards the same thing?

I bought a printed ciruit board from radioshack and i am worried that it is not going to work like a breadboard. Will it?

Asked by schoonovermr 7 years ago

I have a different breadboard and can't figure it out? Answered

I have a different breadboard and can't get my led to work. Can someone please help?

Asked by r3dc0rn 1 year ago

Can anyone make a breadboard layout for this schematic? Answered

This is a stun gun. there's also a video( ) but it would be easy if someone made a breadboard layout

Asked by Hafiz Mohammad Shayan Tariq 5 years ago

Is it possible to make a Beowulf Custer with Arduino?

Is it possible to make a small cluster computer using Arduinos? It has been done with Pi, but could it be made with breadboard Arduino? I read about I2C and it seems viable. Anyone had tried it yet? Awaiting some reply Trace

Asked by Tanmay Das 4 years ago

where can you buy a breadboards? Answered

Question Body: give us more detail on your question...

Asked by SelB1 1 year ago

How to troubleshoot a pir sensor?

Hello I bought a pir sensor off ebay (SKU 14_B000101941) and I plugged it into a solderless breadboard to test it out. I connected a 3v LED between the output and ground and while it does light up, it does not light up when it senses light, it just turns off every 2 seconds, then every 5 seconds. If there is a simple fix to this problem any advice would be appreciated but if not I am willing to buy a different one.

Asked by thorpenny 6 years ago

Arduino Gas Sensors

We are making an arduino-based gas detector that uses a combination of LED lights and a beeping piezo element to alert users to different levels of carbon monoxide in the air. We are having some difficulty in coding to have all the elements work together properly. What are some examples of arduino coding that can have a gas sensor chip, LEDs, and a piezo working together with a set of triggers, like the different concentrations of gas?

Posted by hthnc-student 5 years ago

Ceramic resonator vs. Quartz crystal for arduino? Answered

Hey- I'm going to build some Arduino clones (as posted from ) and was wondering if it would be better to use a crystal or a ceramic resonator. i will be ordering from Tayda Electronics (Ive ordered before, 10 days shipping for rock bottom prices, I'm ok with that) and the resonators and crystals are +-5c. difference, so I was wondering if I could use resonators, since they are a bit cheaper and I'm ordering a few (around 8). Which ones would be better? Also, does anyone know for the circuit from the above link would work with a 4.5v supply if I just left out the 5v regulator? Many thanks- Astroboy907

Asked by astroboy907 7 years ago

Breadboards, componenets, and hot glue

Hey all... I i have a breadboard for a small circuit and it has all the regular componenets such as transistors, resistors, diodes, realys, microchips, etc.  I will have the breadboard in a plastic project case and it will be mounted vertically...  I need a way to secure the componens int eh breadboard better so i waas wondering if i can use hot glue...???  I knwo some components such as the microchip is heat sensitive when solidering but i didn't know if hot glue got to hot or if tehre would be other effects to teh circuit in some way...??? Thanks for the help...!!!

Posted by SummitSeeker 6 years ago

How should be a good beginner BreadBoard? Answered

I want to buy a breadboard, but I dont know how many rows it needs, how many holes, should it have power input and ground, does it needs to be very large? Also how much should I pay for it ?

Asked by Patented 8 years ago

can you use a proto/breadboard to make an ARDUINO?

Simple as the header says. can you make an Arduino mini computer(First picture) from the various necessary components, and a solderless proto/breadboard?(Second Picture)

Asked by ashannon1 6 years ago

Update letter fault

I got an update that an instructables member( that I was following) had posted this topic.  When I clicked on the link I got : ERROR 400: no topic, How-to-create-breadboard-images - ERROR 400: no topic, How-to-create-breadboard-images This is the link:

Posted by sidgupta 5 years ago