Next, we use hot glue to adhere the Nano to the top and the dual CR-2032 battery pack to the bottom. You can lay out this design on a basic breadboard, but to make it durable and portable, we designed a 3D-printed base for the intervalometer, which is available here. Linking the switches to ground allows us to use the microcontroller’s internal resistor to hold the inputs high until the switch closes, therefore avoiding any “floating” inputs before or after we activate the switches. Also, we linked the input switches – which conveniently fit into the Nano’s pin spacing – to ground. We used a roughly 50 ohm resistor, but one in the 100-200 ohm range should also work well. You’ll need to place a small resistor between the Arduino output (digital pin 3) and the opto-isolator to avoid overpowering its internal LED. Aaed Musa has updated details to Rubik's Cube Solver.The coin cell battery pack includes a switch to control power input.Augusto Baffa liked The Hobbyists Guide to FPGAs.Tektronica liked OSUG: Open-Source Underwater Glider.minh7a6 wrote a reply on QMP32B: ARM Cortex M4F 3D Printer Controller Board.lfforth liked Real-time Laser Measurement with a Webcam.Bindhammer has updated the log for Enhancer mask. Bindhammer has updated details to Enhancer mask. Bindhammer has updated the project titled Enhancer mask. None on The Singularity Isn’t Here… Yet.steves on Tiny PCB PiezoPiano Plays Just One Octave.Bastet on It’s A 486 Computer, On A Breadboard.Dude on The Singularity Isn’t Here… Yet.Hackaday Berlin: The Badge, Workshops, And Lightning Talks 10 Comments If I ever buy more, I’ll get it straight from the factory, but eh… I figured out of the 5 boards I got, surely one of them could be reliable…i was wrong in this case! Background: not a novice to programming esp8266 / atmega chips, let alone mcu boards…just saying. These were of course the dirt cheap chinese copycat boards from amazon, so I had a feeling it wouldn’t be smooth, but after that many hours with multiple ftdi/uart to usb methods and hardware I’m still left wondering what combination of rubbing my head + patting my back + holding and releasing multiple wires to various pins actually did the trick those few times I wrote to the boards….esp32 has a bad taste in my mouth now. I bought a batch of boards packaged with camera modules labeled as ‘esp32cam’ recently, and tried everything to get the reset to trigger enough to write any sketch via the ide, and was only successful about 3 times after 10 hours of all the possible tricks and wiring combinations / timing, and even then I wasnt able to get the damn camera modules to work. Posted in digital cameras hacks Tagged Arduino IDE, camera, ESP32, ESP32-CAM, ftdi, gpio, programming, reset, serial, sketch, usb, video wall Post navigation The video quality is about what you’d expect from a 1,200 pixel display at 40 mm per pixel, but it’s still pretty smooth – smooth enough to make his interpretive dance moves in the last few minutes of the video pretty interesting. To demonstrate the add-on, he programmed his ESP32-CAM and connected it to his enormous ping pong ball video wall. It looks to be a pretty handy board, which will be available on his Tindie store. It does that by simply power cycling the camera, allowing sketches to be uploaded via USB. His solution is called cam-prog, and it takes care of not only the USB conversion but also resetting the board. None of that is terribly complex, but it is inconvenient. That design decision leaves users in need of a USB-to-serial adapter that has to be wired to the GPIO pins of the camera board so that programs can be uploaded from the Arduino IDE when the reset button is pressed. The problem stems from the lack of a USB port on the ESP32-CAM. Not being one to take such challenges lying down, has come up with a nice programming board for the ESP32-CAM that you might want to check out. The trouble is that programming it can be a bit of a pain, requiring extra equipment and a spare finger. On paper, the thing is amazing: an ESP32 with support for a camera and an SD card, all for less than $10. Don’t you just hate it when dev boards have some annoying little quirk that makes them harder to use than they should be? Take the ESP32-CAM, a board that started appearing on the market in early 2019.
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