help needed

To anyone who can help me, PLEASE!!!!! I have a circuit board I am working on that is to have 3 outputs... 12V at 1-2A, 6.8V at 1-2A, and 33V at a higher amp rating, about 3-4A... I have the designs attached below, and I have the board here. I have assembled 2 boards, and neither of them is...

Hello everyone. Hopefully this is the right place to post this, I've been asking all over the internet for help identifying this object I have pictures of and this place seems like an active place to ask. I'm not the first person to try identifying this, but I do believe I've been the most...

I have some bluetooth earbuds and I want to make it usable with an aux cord like bluetooth headphones. I could just directly connect a 3.5mm port but then the current would also travel into all of the other parts. Would that be a problem? If so couldn't I just use diodes to prevent this?

Hi guys, I'm working on a problem here where I believe one of the steps uses voltage division to find the voltage across the 10ohm resistor. However, that's not how the solution found the voltage across the 10ohm resistor. I was trying to find the voltage across the 40ohm resistor first and...

I was putting a speaker into a new box and had to cut the plug off to take it apart. Now I'm not sure how to reattach it to the transformer. I can twist them back together without knowing the polarity right?

The cable to the laser fell off from the motherboard and with it the housing. Is there any way to reattach this? Any response is helpful.

Hello, I have been searching the Internet for days now, hours wasted scrolling through alibaba and aliexpress with very little luck. I am looking for a 1 to 2.6 inch color lcd (doesn't matter if oled or tft or whatever) with a resolution of around 480x800 or similar with an aspect ratio of...

Hello, I have a power supply that goes in the wall charger from 220v AC or something to 12v 2.5A DC, but I want to decrease the 12v 2.5A DC to 12v 1A DC... Can someone help me to tell how I get 12v 2.5A to 12v 1A? Best regards Adam.

Hello! I am an absolute beginner learning electronics by working my way through the Make:Electronics book by Charles Platt. I have a long way to go, so I am hoping someone can give me some guidance on a project I am working on now. I would like to have 4 small piezo microphones independently...

Was cleaning out an old chemical plant / lab and found some IC's in an electrical room. Markings on the bottom lead me to believe they are from 68 as this plant ran between the 60's to 2015. Any help IDing them or how to proceed in learning what they do would be much appreciated!

Hello, I have a little problem. I chose a project for school which I've managed to get working... All the circuitry before and after the SMPS is working properly, my only concern here is, that the SMPS is only working at an efficiency of around 54%. I've added my schematics for the SMPS...

Good Afternoon I am busy building a static VAR compensator for a project and i need to use TRIACS to switch in my capacitor banks. The system is 3 phase 400 VAC and consists of 3 motors with varying loads. There is a system that determines the power factor and switches in the capacitors. Today...

Dear readers, i'm a high school Science teacher in Belgium and i've entered my students in a Science and Technology fair. They have a good idea but my knowledge about electronics has its limits... I've got 2 general questions first: 1) i've started with Arduino projects but do you guys know...