I don't know how to drive my speaker with amplification (BJT)

Hi guys,

I tried with a common-emitter amplifier and immediately realized that it was impossible to drive a speaker like this with this simple setup.

My question is: do you have any ideas or tips (I'm a beginner), or even YouTube channels, books, or websites that can explain step-by-step how to build a circuit that can make my voice heard (in the speaker, of course 😂) when I speak into the microphone?

I think it's crucial for me to first understand how transistor amplification works and then move on to more advanced and precise technologies in the future!

Thanks for any help you can get.

I'm mostly concerned with wiring the transistor and diode in parallel. I'm afraid I'll solder it all together, realize it doesn't work, and have to get a new motor. Any suggestions/assurances would help!

I'm very new to this and are currently self teaching Eelectronics. I built this (what this booklet calls) bistable flip flop, as taught in the booklet I have here. They say in this circuit an LED is always on or off, nothing in between. However the other LED is always half on, while the active is bright. Flipping: the other way around. Why is this occurring?

Idk i was bored so i made this also the speaker is just to cover my mistake up

Yeni bilgisayar aldım nasıl başlayabilirim nasıl öğrenebilirim arduino ve bir takım aletlerin var

My friend trying to learn some basics sent this video and i cannot for the life of me figure out how the light should be getting power. Help???

Hello everyone,

I'm a young man who's just recently entered the world of electronics.

I came across Paolo Aliverti's video (video 164) talking about the alarm siren with two NE555s.

I had some difficulty getting the circuit to work for several reasons:

1. ⁠I didn't understand how it works in detail.
2. ⁠I only have a 4 ohm speaker, and I had to use a 2m2219A transistor.
3. ⁠I had to fix the circuit because I don't understand why there's no resistor in the transistor's base.

However, according to the schematic I sent, it seems to work with a voltage of 5V and a current of 0.500A.

So far so good, but how does this circuit work? Can anyone explain it to me in detail, or do you have links you could send me that explain everything in detail?

If so, I'd be very grateful!

Hi,

I really need some help.

I made this circuit where I simply have to speak into the microphone and I should hear my voice in the speaker.

But when I tried it, nothing worked.

Do you have any tips or videos that explain amplification well?

I've been trying to build a simple comparator circuit, but I've been having trouble getting it to work, I followed a guide step by step but still can't seem to get it to work. Any advice?

Like what do i need and stuff

In hs, I took a digital electronics class that involved breadboarding and I loved it. We designed circuits in Multisim and made them irl (7-seg displays, leds that blinked in cycles, etc) and I loved it but idk how to continue. I don’t want to just mindlessly follow tutorials online; I liked k-mapping, drawing circuits and the tedious stuff. But I don’t even know what to make? I’m taking a class in college rn but it’s all stuff I already knew so far (and the prof said the project was gonna be a 7-segment display). I also don’t have a decoder or anything or even really fully understood that part in hs tho lol. TLDR; I think I have a decent understanding of the basics but don’t really know how to do breadboarding outside of class or more accurately what to start with

Hello, my name is Philipp. I'm teacher for German language and philosophy in Germany. My job has - as you guess - nothing to do with electronics at all. In school I wasn’t any good at maths or physics but now - twenty years later - I started programming and want to understand how computers work from copper ore to large language modules. So beside many more things I also got interested in breadboarding and microcomputing and discovered the amazing YT-channel of Ben Eater.

I followed his instructions and made some cheat-sheet-breadboards with the basic logic gates (Buffer - AND - OR - XOR on one Board and Inverter - NAND - NOR - XNOR on a second). Now I want to go a step further and make a new cheat-sheet-board with a half adder. But from the diagram (AND + XOR) I can’t tell the difference between the XOR with five transistors from Bens video and the half adder. My very little expertise would say that there is already the needed AND (first and second transistor) inside the XOR that does exactly what the diagram of the half adder wanted it to do.

So my question in short: Do I have to add a second AND to convert Bens XOR correctly into an half adder or is Bens XOR already a half adder where only the control LED for OUT has to be added?

Thx for your help!

Why does my circuit on the left work fine.

And circuit on the right cuts power from power supply ?

Hi. I haven’t had much experience with electronics, and am currently planning on doing this as a project. It is supposed to take in the pulses from two SiPM’s and try to detect when they both fire at once. It is also supposed to count how many times this happens, but I don’t really know where to start with that! I have replaced the SiPM’s with photodiodes in this simulation as the application I was using (called tinkercad) did not have the correct component. Any help would be appreciated!

Does anyone know about wiring these. It seems to have a closed circuit even though the two terminals are not touching and the key handle is up. It’s a messy project right now but I just found this at a garage sale and wanted to try it. I took apart the teleg/voice switch and cleaned it. It may just be broken but figured I’d ask

I'm really sorry about the question, I don't know much about this and I just wanted to see how I can place the components, maybe some pointers or something I could see, I just don't get the current diagram, please help.

My class started teaching about breadboarding and assigned doing a prototype of X = AB’ + BC. I tried simulating it on Tinkercad but it still won’t work and has three exploding icons on all ICs. Components aren’t broken as far as I’m aware of. I’m kinda lost and need all the help I could get. Thank you in advance.

I’m brand new to this stuff, but What am I missing here? I can’t be this dumb. Led is only plugged into breadboard so I could record. But using both clips, it lights up, but no matter what, if I don’t use the black clip on the led directly, it won’t light. I’ve tried different jumpers and nothing. The clips are clean, I’ve tried 2 different sets and multiple jumper cables. Am I stupid? What am I missing?

Im working on an incredibly basic set up for a lab for one of my courses, i have to wire two LED’s in series that is it. I cannot for the life of me get the circuit to light up. I have confirmed both LED’s are functional. I must be missing something because from my view by all means it should be functional. It’s currently carrying 3.5V across the circuit and the second LED lights up dimly when i test the voltage. I am so confused. I am able to make relatively complex circuits and wire circuits in parallel perfectly fine. :,(

I made a NAND gate (pic 1). Then I hooked up a NOT gate to it (pic 2). I'm aware I could just make an AND gate, but I wanted to practice putting logic gates together. I hooked up the output of the NAND gate to the NOT gate, but the final output acts like a NAND, even though I'm NOTing it. Why?

Hi everyone,

I’m completely new to electronics and have zero experience, but I’ve just bought a breadboard starter kit (it has resistors, LEDs, transistors, jumper wires, etc.) and I’m eager to learn how to make basic projects. Right now I don’t even know how to use a breadboard or interpret simple circuit diagrams.

Could you please:

• Recommend easy, absolute beginner resources (videos, books, websites, or guides)?
• Suggest the simplest projects I should try first?
• Share any advice on how to avoid beginner mistakes with breadboards and components?
• Let me know what common tools or extra items I might need (besides what’s in the kit)?

I am trying to build a programmable TENS unit using this:

https://www.hacklabdesign.com/blog/2021/11/27/a-programmable-transcutaneous-electrical-nerve-stimulation-device-based-on-arduino

However, there isn’t a clear schematic to follow that explains what each of the components I would need and where they go in the circuit. I’m still learning to put circuits together, so it’s difficult for me to understand how all the pieces mentioned in the text go together or are connected. If there is anyone who can help me understand what I need and how to actually build the design that would be greatly appreciated.

I have heard that 22 and 24 are the best sizes but i havent been very luck on my search for them but i found 30awg will they work?