An unofficial place for all things Arduino! We all learned this stuff from some kind stranger on the internet. Bring us your Arduino questions or help answer something you might know! 😉
Diy Electronics
Reddit's original DIY Audio subreddit to discuss speaker and amplifier projects of all types, share plans and schematics, and link to interesting projects.
A subreddit for practical questions about component-level electronic circuits: design, repair, component buying, test gear and tools.
Are you building a solar system for your house? Shed? RV? This subreddit is for you! Discuss your projects, show us pictures, ask for help. Anything DIY Solar!
A subreddit for practical questions about component-level electronic circuits: design, repair, component buying, test gear and tools.
A place for talking about low voltage wiring both residential and commercial. Everything from Cat5 to Cat7, Coax, Audio, HDMI, Fiber, and anything else that calls itself a cable.
Information sub on all types of generators: home standby, Commercial, portable, RV, marine, etc. Repair tips, ratings and maintenance information available as well as recommendations on how to repair and safely operate a generator in an emergency.
So from my last post, I have learned a lot more about how the GPIO pins work. I didn't realize they were already powered by the 3.3v rail, so now that I have figured that out, my project has gotten much simpler.
What I don't understand is how to figure out which resistors to use for LEDs. The Official Pico MicroPython guide says to use a 330ohm resistor for an LED, but that seems like way too much resistance?
If the GPIO pins are at 3.3v and a red LED is at 2v, that's a 1.3v drop. Searching around Google has provided several sites stating that a red LED takes 20mA. So 1.3v/0.02A = 65ohms.
I set up a simple circuit on with a 3.3v supply, a 65ohm resistor, and a red LED, and it works fine. If I swap it to a 330ohm resistor, the LED is much, much dimmer. The set of LEDs I bought came with 470ohm resistors to connect to a 12v supply.
Far be it from me to assume that the book is wrong, so what am I misunderstanding? Where does the 330ohm resistor value come from?
Thanks!!
An unofficial place for all things Arduino! We all learned this stuff from some kind stranger on the internet. Bring us your Arduino questions or help answer something you might know! 😉
Welcome to Meshtastic's Official Subreddit! You may also find us on [Discord](https://discord.com/invite/ktMAKGBnBs) and [Discourse](https://meshtastic.discourse.group).
ESP32 is a series of low cost, low power system on a chip microcontrollers with integrated Wi-Fi and dual-mode Bluetooth. The ESP32 series employs either a Tensilica Xtensa LX6, Xtensa LX7 or a RiscV processor, and both dual-core and single-core variations are available. It includes in-built antenna switches, RF balun, power amplifier, low-noise receive amplifier, filters, and power management modules as well.
Hi,
I bought a couple ESP32-S3-DevKitC-1-N8R2 microcontrollers and ran into an odd problem. They are fairly large (57.15mm x 27.94mm). I'm not able to find a breadboard or breakout board large enough for them.
What do people typically do in this situation? Not sure how one would mount these, tbh.
TIA -T
Update: I'm adding a couple images to show you what I mean. Notice that in both cases, the only row available is the top. The microcontroller is so wide it takes up the rest of the a-j connections.
Reddit's original DIY Audio subreddit to discuss speaker and amplifier projects of all types, share plans and schematics, and link to interesting projects.
Information sub on all types of generators: home standby, Commercial, portable, RV, marine, etc. Repair tips, ratings and maintenance information available as well as recommendations on how to repair and safely operate a generator in an emergency.
If you are decommissioning or parting out a Kohler 20RCA or other model that uses same enclosure I am looking to purchase the top, front, and/or rear panels. Please message me. Mine was damaged by a tree fall, but the rest is ok. Thanks!
Reddit's original DIY Audio subreddit to discuss speaker and amplifier projects of all types, share plans and schematics, and link to interesting projects.
A subreddit for practical questions about component-level electronic circuits: design, repair, component buying, test gear and tools.
We are currently private in protest of Reddit's poor management and decisions related to third party platforms and content management.
Hi everybody who is willing to help, our team is currently testing out different sensors for distance, and we came upon the MaxBotix I2C Ultrasonic Sensor, from this website: . We are wondering if there is any pre-made code that is compatible for this sensor and if anyone has used this before, does it work?
An unofficial place for all things Arduino! We all learned this stuff from some kind stranger on the internet. Bring us your Arduino questions or help answer something you might know! 😉
/r/RetroArch is a subreddit dedicated to RetroArch and the libretro API framework. Post setup guides, questions and news here!
This subreddit is dedicated to both amateur and professional engineers that want to build cool stuff at home, challenge themselves to learn new technologies, learn from each others' designs, and showcase their side projects.
Hi,
I have been soldering only through-hole components so far. What tools do I need for the SMD soldering?
For example do I need a sepearate heat gun or the normal one and/or solder iron is sufficient (I don't plan on doing BGA)? I saw various videos/tutorials and some are using one or other method so I'm a bit confused.
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A subreddit for practical questions about component-level electronic circuits: design, repair, component buying, test gear and tools.
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An unofficial place for all things Arduino! We all learned this stuff from some kind stranger on the internet. Bring us your Arduino questions or help answer something you might know! 😉
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/r/RetroArch is a subreddit dedicated to RetroArch and the libretro API framework. Post setup guides, questions and news here!
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For questions, news, and discussion about batteries, cells, chargers, charger/inverters, power banks and UPSs.
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ESP32 is a series of low cost, low power system on a chip microcontrollers with integrated Wi-Fi and dual-mode Bluetooth. The ESP32 series employs either a Tensilica Xtensa LX6, Xtensa LX7 or a RiscV processor, and both dual-core and single-core variations are available. It includes in-built antenna switches, RF balun, power amplifier, low-noise receive amplifier, filters, and power management modules as well.
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Information sub on all types of generators: home standby, Commercial, portable, RV, marine, etc. Repair tips, ratings and maintenance information available as well as recommendations on how to repair and safely operate a generator in an emergency.
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MBL.REPAIR | Mobile Device Repair Whether you are a hobbyist or a tech sitting in the shop. This sub encompasses everything from basic computer, phone & tablet repair, to also those delving into the board level repair and data recovery aspects as well. We also provide basic getting started guides as well as links to vetted parts suppliers in our sidebar. Where we believe that as long as the device turns on, the screen is repairable! Welcome to Mobile Device Repair!
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A place for solderers from around the world, to gather, help one another, and hang out.
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Are you building a solar system for your house? Shed? RV? This subreddit is for you! Discuss your projects, show us pictures, ask for help. Anything DIY Solar!
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This subreddit is dedicated to both amateur and professional engineers that want to build cool stuff at home, challenge themselves to learn new technologies, learn from each others' designs, and showcase their side projects.
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Have a rotorcraft that has two or more horizontal rotors? Then you're in the right place! Bicopters, Tricopters, Quadcopters, Pentacopters, Hexacopters, Octocopters, indeed any non-fixed-wing aircraft is very welcome here.
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Welcome to /WLED! This is a community mainly for WLED users to ask questions, show off their work, or help new users out!
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**Official Printed Circuit Board (PCB) Subreddit** - schematic capture / PCB layout / PCB assembly / gerber reviews / Altium / DipTrace / KiCad / LibrePCB / OrCAD / LTspice / QSPICE / Arduino / ARM / FPGA. Please read review instructions at https://old.reddit.com/r/PrintedCircuitBoard/wiki/index#wiki_instructions_for_reviews
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Reddit's original DIY Audio subreddit to discuss speaker and amplifier projects of all types, share plans and schematics, and link to interesting projects.
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Reddit’s home for all things lighting. Commercial, Industrial, Architectural, or Residential- you name it. Ask questions, recommend products, and post cool lighting!
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Welcome to Meshtastic's Official Subreddit! You may also find us on [Discord](https://discord.com/invite/ktMAKGBnBs) and [Discourse](https://meshtastic.discourse.group).
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Instances of crazy fixes that actually ended up working. Or not working, I'm a description, not the cops.
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If you want to show off your new DIY drone, or if you have questions on how to build one, this reddit is for you! Unmanned Aerial Vehicles (UAV), Unmanned Ground Vehicles (UGV) and just about any other unmanned vehicle you can think of are welcome here.
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This subreddit has been taken private from June12 in support of the strike on reddit to protest the upcoming changes to the pricing structure for the reddit API and related rule changes. ------- You probably want all your electronics to run on the 18650 lithium-ion cell. You just don't know it yet.
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