help

Hello, I have a 2014 Aprilia RSV4 with 1 black user key, I did not know they had PIN codes when I bought her. Anywho, after a week of fun riding the bike went into limp mode and is now demanding "Insert the code" everytime I start her up. I am the 4th owner, the 3rd is the shop that sold her to...

Hi everyone! I’ve been working on a microcontroller-based project that was rock solid on a breadboard,, but I’ve hit a bit of a mystery after moving the design to a custom PCB. While the jumper-wire prototype felt very stable, the PCB version is behaving unpredictably—specifically during...

I have this IC on this board thats from panel heater that works with Tuya Smart... Tried searching online the marking, nothing came up... Heater is gorenje Optiheat 2000 ewp... and it stopped working. control panel is not turning on... So im trying to fix it... Thank you!

Hello, I disassembled HCD-RG295, its an audio system with CD, Decks, radio, and amplifier, and I want to take amplifier from it and make it work with aux, but I am not very much knowledgeable of what to do to make it work. I would be happy if it had like aux, volume control, and that's all. I...

Could someone please help design a cascode amplifier with these parameters? Frequency range: 200 kHz to 20 MHz Input signal voltage: 10 mV to 1 V Power supply voltage: 5 V to 12 V Power consumption: up to 100 W And if possible, please also include the calculations showing how to achieve this...

I accidentally got the wrong RGB LEDs. They aren't controllable and have a preprogrammed way of flashing Is there any way I can still access the individual red green and blue diodes to control it myself, or would it not be worth trying? gif of the LED:

PLEASE LOOK HERE FOR DETAILS: Electricians Forum I need help urgently with this. Feel free to reply on whichever forum. Thanks!

Hi all, I need some help with what is probably a simple fix. I received a composter second hand and when initiated all components work. Panel and touch screen work, motors work, fan work, the only part that does not work is the heating element. Attached are some images of the heating element and...

I am a beginner and I don't understand why the transistors aren't permanently on, because the current is flowing from the capacitors and from the battery to the base pin at the same time, so it should be turned on because there is a wire that connects the transistor base pin directly to the Battery

I'm looking for advice/help with designing a USB-A dongle that disconnects power and data lines (I think disconnecting these 3 is the best option?) when a button is pressed and lights up an LED when disconnected. Key points: Button: Momentary NC switch to cut VCC, D+, and D- temporarily. I'd...

Hi, I'm a physics student, and I have a small problem for a lab that I have to solve. Here is my problem: I must create a circuit which uses capacitors to gradually close a light, but in addition, we must pass the current from the capacitor which discharges by the base of an NPN transistor. A...

So I am currently in my second year of college in a physics major. I took my electromagnetism course in my second semester and I got a liking to it. However, the course was completely on a theoretical physics level and in the circuits chapter I didn't perform the best. Sadly I also flunked the...

Hello everyone. I have a problem regarding low pass pi filters. For context, I am a physics student and this is way, and I mean WAY outside of my purview. So much so, that I can't find this circuit, or anything like it in my textbooks. After some gruesome research, I found some formulas which I...

Hey everyone, I reached out earlier for some feedback on my first PCB schematic, and I got some really helpful advice. Now I'm hoping those with more experience can take a look at what I've done so far. I'm also wondering if someone could check if my schematic actually works because honestly...

Im new to these kinds of stuff, very noob question here but I found an old car amplifier with a sub on it (attached photo). I’ve watched YT vids on how to actually make it work. Im just wondering if in the “bridged” speaker out i can just put a female 3.5 mm to bare wires. since i only have...

The circuit shown below is intended to power and control 5 small stepper motors and 3 end/limit switches. It takes power from a wall outlet like shown below and converts the ac current to dc power. This voltage then gets bucked down and sent to microcontroller which then is connected to motor...

hello, i had a 9 inch monitor my car and after long time i open it and i want to use it's TFT display, i don't know how to use it but i know something: 1. it has 50 flat and one board on it, that merge the 50 flat from display and 10 flat from controller and send it to main board with 50 flat...

I know its a bit janky but Ive just needed to make this door opener device remote control and for some reason, I cannot get this receiver to power anything even when both channels are on. Can someone help me?

Trying to design a photo-enlarger, and as part of it, I need to be able to control the relative brightness of a 20w cobb led thats powered off of 30v. I'm trying to use an off the shelf mosfet board (HW-700) that I had around that I can use alongside an arduino to control the led using pwm...

I Recently got hold of a dso138 kit, upon finishing the kit I went through testing all of my voltages and everything appears correct. The LED flashes once when powered on but only when the LCD screen is not plugged in. If the screen is plugged in, absolutely nothing happens and when I check my...