pcb

Hi everyone. Im looking to repair a curcuit i have. It will no longer work if the device gets cold. If it is heated up, it will start to work again. Very strange. I want to replace an IC on the PCB of the device. I need a replacement , but can not find out what would be an equivalent for the...

Hello, Internet community! I'm working on designing a PCB that includes an Arduino Nano and several modules (BNO055, GPS module, RF module, BME280, and an SD card reader). I've referenced some Adafruit schematics to help with my design, but I've encountered a few challenges, especially since...

Hello, Internet community! This is my first time posting in a forum, and I need some advice for a project I'm working on. I'm designing two devices that can send and receive files using 5G technology. In more detail, I'm aiming to design a PCB that includes a processor capable of handling...

I’m working on a personal project, and I could really use some help. I’m not an electrical engineer, so I apologize in advance if this is a basic question, but I’m a bit stuck. I paid someone to design a personal alarm PCB board for me. It’s similar to those cheap $10 alarms you find on Amazon...

Greetings. I'm an electronics hobbyist and I'm currently stuck on Simulating a PCB before Fabrication. I designed a PCB using the EasyEDA.com platform, but I would like to simulate its response before sending it for fabrication. How can I test the PCB, and which platforms/software(s) can I use...

Hello all, I am working on an isolated gate driver bias supply with a 4-output transformer. this transformer is VP4-0075-R and it has a weird pin configuration. Here is my attempt to layout this transformer.. and the circuit is based on this schematic.. Is my layout good? if not what...

Hello everyone, heres an quick overview of what the design does: the Si4703 radio tuner receives signals from the FM frequency band. Those signals will then get amplified by the PAM8008 module to output audio from the speakers. The current board stackup is sig/gnd/gnd/sig. Some additional...

Goodmorning, I'm working on a project for my studies in electronic engineering, I am looking at a PCB of a qr scanner and trying to debug it in order to use it with a microcontroller (esp32). The output of the scanner is usually taken from a usb port, but on the PCB there are also 4 others pin...

I am inspecting a few PCB designs and seeing some unusual features and would love help identifying them. In two of the attached images, there appear to be unfilled holes that go all the way through the 2-layer PCB. The placement of the holes doesn't seem to align with locations for optional...

I am a complete beginner, but I would like to learn how to use Altium Designer. Sorry in advance for the silly questions. I have the following two circuits (pic no. 1) that I want to combine into one circuit and draw in Altium Designer schematic. I tried to draw the mentioned circuit in Altium...

Hello, I am trying to make a simple inverter pcb but my output is a square wave instead of the expected spwm. I suspect that some capacitance or inductance is built up due to the pcb layers that alters the gate signal. My traces going to the mosfet gates are quite wide (1.5mm) and their length...

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...

I have a device that works on **3V battery** (2 D size cells) now I want to debug it so that all the devices work correctly. My device consist of **atmega 328p**, running on 08 MHz Crystal which gets readings from ADXL345 for 2 seconds and then store it in 25Q64FVSIG flash memory and then RFM96...

Hello all, I appreciate any time you take to read this. I'm somewhat new to KiCAD and new to using simulation software's. I cobbled together some SPICE code for the parts in the circuit below and ran the ERC to try and knock down any errors. The simulation still does not run. I am trying to...

Hello Community, I am Yogesh D from Trident Pneumatics Private Limited, R&D Innovation - Electronics. We are currently using a 16x2 LCD display (model BCB-1602-03C) in the controllers of our dryers. However, we are encountering significant EMI issues that are affecting the display's...

Hey all, I'm looking at the datasheet for the ISP_BLE_5S1057, specifically the AX variant, and when looking at the example they provide I am completely dumfounded by all the extra stuff they have on the schematic. I'm very new to the whole world of PCB design, so if someone could help I would...

Hi All, This is probably a very easy question, but if I have a 3.7v lipo battery attached to a voltage regulator outputting 3v, and I have a 100nF filtering capacitor to filter out noise, should I put the capacitor before or after the voltage regulator. Also, would I just want the voltage...

Hi, This is my first time designing a PCB and I just wanted to check that I had done it correctly or if there's anything I can improve. The main focus of this design is to scale down Voltage into a GPIO entry on an MCU and then scaling back up the voltage coming out from the MCU to the OEM...

would i have to connect a voltage supply to the input of the logic gate(output of comparator)?

Hello all, I've recently completed the design of a circuit schematic and PCB for controlling an RGB LED string using a NodeMCU ESP8266 WiFi module. The circuit operates on a 12V DC input and utilizes three relays to control the red, blue, and green LEDs respectively. The LED string itself draws...