Wireless

I found on YouTube (YouTube Current Booster) this circuit, and would like to try it on a current project. I do not need 60 Amps but only 10 to 12 Amps. My question is can I use a single MosFet instead of the 2 in their circuit? According to the IRFP2500 data sheet it can handle 30 Amps, which is a lot more amps than I need. What MosFet will fit my needs? If possible an SMD device (with a heat sink) would be nice but not necessary.   The power supply I plan to use is Buck Regulator Power Supply Module.       Is this a good design?          

I've literally just considered designing a rodent scarer using frequencies above 20kHz and dug out a vintage piezo tweeter and wondering before I start searching if anyone has any experience in this area? The limited spec for the device is. So the first issue I have to account for is I need an amplifier which is stable driving a capacitive load. But what about the drive voltage?I'm suspicious of the mentioned 400W rating as I can't imagine driving the tweeter at this power and assuming it just means it is suitable for an audio amplifier of 400W rating as a tweeter. It can also be added on to the low and mid-range speakers directly and a cross-over filter is not required. So in summary what would be the suggested amplifier requirements?  

Background***********I'm very new to electronics/IoT dev. I'm trying to create a solution to be able to read my wife's Car's CAN Bus signal (messages) and store it to an SD card. I hope to analyze the data and build a dashboard based on the car's telemetry. This specific question is in relation to a chip (STM32F1) on an IoT board (MXChip AZ3166) I already own, which I hope to incorporate into my overall solution as the data acquisition layer. For reference the: Chips is the: STMicroelectronics STM32F103C8T6, 32bit ARM Cortex M3 Microcontroller and the IoT board is the: MXChip AZ3166 IoT DevKit Reading the MXChip AZ3166 board's spec and after doing some research, I have found out that the MXChip AZ3166 comprises two main chipsets: | Vendor | Part Number | Ref Link| -- | ----- | ---- || STMicroelectronics | STM32F103C8T6 | https://uk.rs-online.com/web/p/microcontrollers/1023545| MXChip | EMW3166 | https://www.mxchip.com/en/products/module/54 Main Question******1) The product specification mentions the STM32F1 features Comprising of motor control peripherals plus CAN and USB full-speed interfaces, it also states it has 1x CAN Channel. Does that mean I can interface the MXChip AZ3166 board featuring this chip via the GPIO pins to the CAB bus in my wife's car and receive the CAN Bus signals (I presume adhering to the ISO 11898-1 CAN data communication protocol). 2) How would I find out which pins to connect to the CAN Hi & CAN low connections on the cars CAN Bus? 3) Concerning power, how would I determine that the CAN signal received doesn't fry the MXChip Board with a stated max Operation voltage of 3.3v?   [1]: https://uk.rs-online.com/web/p/microcontrollers/1023545?  [2]: https://www.seeedstudio.com/AZ3166-IOT-Developer-Kit.html

i would like to ask anyone who already makes a project of Laundry Automation?  a customizable program/circuit from filling of water, washing up to drying (spinning) cycles thanks!

Good Morning, I would be grateful if anyone could help me identify a NFC antenna that I can plug into an Android device. It's really hard to remember where the NFC 'spot' is on a phone so having something that can plug in and do the same job would be very helpful, especially for those people who are not quite so tech savvy!  Thank you in advance,  

Can someone figure out what the issue is?   Connected 2 cables black + red from Offical 7" touch screen to Raspberry Pi 4 model B and white cable.     Nothing showing on screen in terms of any light nor graphical images.

I am attempting to implement an automated watering system for plants using MicroPython and a Raspberry Pi IO, but am experiencing difficulties getting the water pump to function as intended. The pump has a specified operating voltage range of 2.5 - 6 V and a current range of 130 - 220 mA. I followed the instructions provided in a tutorial on https://www.pcbway.com/project/shareproject/Automatic_Plant_Watering_System_using_Raspberry_Pi_Pico.html for connecting the pump, but when attempting to use it, I only hear a faint ticking noise. The rest of the system, including the soil moisture sensor, temperature/humidity sensor, and ultrasonic sensor, are functioning properly. Can you provide any assistance in troubleshooting the issue with the water pump?

Hi  I am looking for a battery holder that delivers 1.5 volts for a dolls house lights. I think I want 4 or 6 AA batteries.   How can I tell if the RS holders delver in series or parallel? Thanks

Home WiFi mobile phone computer speed measurement in the same environment, the same platform with the same node speed measurement between the two bands is nearly 5 times the actual difference between the two bands is so big or 5g reception of mobile phones is inflated if the actual gap is so big what is the recommended single 5g band wireless card

For family and friends over recent years I have recycled several Li-Ion batteries. Several were difficult to extract from older cameras and phones and had swelled significantly! My question is I know using/charging swollen Li-Ion batteries has a fire risk, but what about old presumably discharged batteries that then swell? I went through all my old cameras and phones and then found two in the same state! I'm sure I'm not alone with old equipment so it would be useful to have an answer.

Do I have to change cartridges anytime I want to solder at a different temperature?

When the flux is applied to the electrical leads being soldered, it removes oxidation and prevents air flow into the leads, thereby preventing further oxidation. Solder adheres more easily to non-oxidizing metals, so this way the solder flows evenly over the electrical leads. Since the solder is evenly distributed in the electrical leads, its conductivity will also be improved.

I saw a video that shows soldering SMD devices using a heat gun. So I am wondering what heat gun will work the best? It looked like the device centered itself on the PBC lands as the soldier paste liquidizes. It looked a lot quicker and a lot easier than using a soldering iron.

Hi! I'm currently in need of assistance. I'm trying to work on a project for my home and it's about controlling all my appliances with Wi-Fi. I've made a post like this on KiCad but would need more assistance with regards to the electrical part. I want to make small nodes. There'll be a separate node for main switches, then from the washroom switches, and maybe a third switch to control a window curtain control node. I would like to make different nodes and they'll all have some means of communication. From a personal research I conducted, the only thing I found similar to what I want to design was this. I just need help with the electrical aspect. Although, I've previously worked on ESP32, I'm not sure of me next steps. From what I recall, I think I might have to make some ESP32 mesh networks for multiple nodes to talk to the parent node. Any suggestion will ne truly appreciated. Thank you very much in advance. Keonte.

Hey there. Wondering if someone can direct me to the right product for this job. Or put their hand up to take on the project.  I'm looking to create a jackpot scoreboard of sorts. Everytime someone pays a dollar at my venue, I want to be able to see an electronic scoreboard increase. So a simple push of a button should take the value up by 1.  Hopefully someone in here can help direct me to the right product.    Chris