/r/breadboard
This is a place to learn and to show off electronics prototyping. All levels of expertise are welcome from the beginner to the enthusiast to the professional.
/r/breadboard is an electronics and electrical engineering lounge. It is a place to ask for and offer advice or helpful hints on electronic schematics, breadboard layouts, printed circuit board designs, or to show off your prototyping efforts. Tutorials and schematic guides are also encouraged.
All skill levels are welcome. Please post homework questions to a more appropriate sub.
Posts that are off topic will be removed.
/r/breadboard
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I breadboarded this scary fast Nerf robot mod :)
04:23 UTC
Do citrus based cleaners dissolve photosensitive films?
Got a project that will have photosensitive film design over paint. Is there a good way to remove the paint but not the photosensitive film?
Would a citrus based cleaner dissolve the film? Looks like it removes paint.
20:53 UTC
LDR sensor on mini breadboard
Me and a team of high schoolers are making street lights which work based on light sensors. We ended up buying a mini breadboard because we couldn't solder into pcb board. Is there any way to make an ldr sensor with a BC547 transistor, 100k ohm resistor, ldr sensor, 390 ohm resistor and a 9v battery? Now the project is due tomorrow and we cannot find any way to figure this out.
Is it possible?
16:40 UTC
The diagram
I meant to add this on my previous post
05:50 UTC
Smart Farming System
Hi there! I'm currently working on a project to simulate, model, and build a smart farming system using an Arduino Uno, a soil moisture sensor, an LM35 temperature sensor, and a GPRS module. The system will include an LCD screen to display sensor readings. The main objectives are to supply water when the soil moisture is low and to activate a fan if the temperature becomes too high. I'm feeling a bit lost on how to proceed with this project and would greatly appreciate any guidance or help you could provide. Thank you!
02:07 UTC
Help with jumpers and resistances
Hello, I am making a project with a 7 segment display and there is a part with jumpers and resistances that are in the same "hole" and i wanted to know if i can put the resistances inside some of those jumper cables or that could burn the whole thing up (This is an example of what I mean)
This was the right screenshot, sorry
22:33 UTC
How is this not working as an AND gate?
15:44 UTC
Does anyone know why my SN74HC138N sometimes has two outputs low at the same time. I thought that the decoder should only have one output low and the rest high.
22:11 UTC
Question about power supply (Elegoo)
So I'm a beginner and I don't know much about breadboards. I have done the most amount of research about breadboards but I still don't understand what a power supply is and how to use it. Here's a picture of my power supply. P.S. if it needs to be coded which I don't know if it has to or not, it has no code I believe.
17:46 UTC
I Need help
Hi guys, so I just recently started engineering and I’m having trouble trying to understand how to measure current and voltage using a dmm and a dc power supply. I’ve been struggling with this for a while and I’m too scared to ask my instructor’s questions because they get mad/upset I when I don’t understand something and my midterms are coming up. How would I measure something like this on a bread board if I was trying to figure out the current or voltage and where do the alligator clips go?
16:39 UTC
My XOR IC doesn't completely work
The first and the 8th buttons are connected to ground, but if you press them they are connected to the IC. But the LED has some noise, it is flickering all the time. You see a slight difference when pressing one of the buttons and when pressen both it clearly goes off, so it seems that th XOR-gate does work, but with some noise. How do I fix this? Do I need to remove the resistor from the IC's ground pin maybe?
09:45 UTC
Why can we not connect both terminals of a capacitor on the same column?
I know this is very vague but my teacher keeps on telling me that if we connect both terminals on the same column then we are shorting it and we have to put them on separate lines but why?
04:25 UTC
Help with Electrical Circuits Project
Hello, our group has a project for our electrical circuits course in college which is to make a scale model of a house with a lighting system. We have to use a breadboard for this and just LEDs, resistors, and SPDT switches. Our problem is how to put the leds and switches for different rooms and connect it to the breadboard. Thanks for helping!
12:44 UTC
Help (new student )
This is a lab for my electronics class (fist time taking it ) so look at the diagram I drew, if w2 is touching any resistor, I think this basically created a parallel resistor. So, if I connect r1 it should be small than if I connect r5 but the result of the experiment doesn’t seem like it. Can anyone explain it to me. Thanks!
17:32 UTC
Help
08:50 UTC
Help I don't know what is wrong with it
I am new to the whole breadboard thing, I need help maybe its the voltage i will post a picture of what is supposed to look like and mine.
00:09 UTC
New to bread board
Heya! Woudl someone be able to point me to a good tutorial on this new bread board i got sonce it didnt come with instructions
Picture included!
17:35 UTC
Need some Advice
need some assistance with this question as its asking what resistors would be SC and which would be ok but the only one that i see that is SC is R11 and idk if im missing anything because placing a resistor vertically is perfectly fine is it not? any advice for knowing weather it is SC or not would be appreciated.
23:07 UTC
Hi help me to do this If I see an example I'm going to understand pls
05:46 UTC
Struggling With DIP switch/IC Experiment
Brand new to bread boards and I'm having trouble understanding the issue with my board.
Using a CD4071 IC (quad 2-input OR gates), I get the opposite results I'm supposed to from the truth table, it looks like a NOR table.
| 1 | 2 | OUT |
|---|---|---|
| 0 | 0 | 1 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |
This is the circuit diagram I'm supposed to make my board from.
Any input on my board or breadboarding advice is welcome, as this is the first of many I have to put together.
Thank you.
23:09 UTC
Can someone explain IC programming to me?
I'm definitely a beginner but I feel that I have a solid foundation in the other aspects of electronic design. I don't understand programming ICs at all.
I (think) get that the chip is flashed by providing it with electricity which it reads as "high" or "low" which is translated to binary for the chip to run.
I just don't get how this process works. How do I provide it the right amount of electricity? How do I program a given chip without having to have a billion different programmers or designing a billion different breadboard programmers?
15:48 UTC
Logic IC still not working
Hello again, I did what was suggested by people on this forum and it didn't work. The teacher had a look at it and couldn't figure out how to work it. Any way to fix it? here is a video of the simple circuit with the logic IC.
07:18 UTC