Here is a tutorial on how to build a sous-vide cooker. Sous-Vide cookers cook food placed inside a plastic bag, which is inserted into temperature controlled bath. NerdKits describes all the theory, along with plenty of instruction on how to build your own. Via Hacked Gadgets.
Pinguino design team released the design for the Pinguino32 PIC32 development board using their Pinguino bootloader. It supports PIC32MX250F128, and PIC32MX220F032B microcontrollers. The design is open source, and made with KICAD software. Download it from their Google code area.
If a project calls for resistor arrays, but all you have are singles and mad soldering skills, you can try this hack. Yoganerdnl used a bunch of 0603 resistors on their side to replace the resistor arrays on his Bus Pirate SOIC DIY edition board. It takes patience and a steady hand, but it’s a […]
Johnathan Hottell wanted a way to monitor and display the temperature readings at various points around the engine on his LB7 Duramax diesel truck. He developed this project for a six channel temperature monitor employing a bank of thermistors to monitor various engine locations. They are read each second by the Arduino’s analog pins, with […]
Reading ambient temp is useful in electronics, and reading it from your handy multimeter is even better. Raj added a thermometer feature to his DMM, by hard-wiring it into the case. He used an LM35 analog temperature sensor and a slide switch connected to the multimeter inputs. You just flip the knob to the 200mV […]
DIY etched boards are the quickest way to get a project up and running. This is just what Noy did with his IR Toy, and CPLD breakout boards. He modified our projects to a single layer design. Used the toner-transfer method to copy the traces, and etched the boards with a mix of hydrochloride acid […]
Ante Vukorepa draws our attention to this video of Claude Paillard, a French radio amateur (F2FO), making his own tubes (also known as thermionic valves) from scratch. “The video depicts the whole process, from winding the filament through making the glassware, assembly and vacuuming, to testing. Pretty awesome!” For more information on Claude’s activities as […]
Homemade soldering flux has been a hot topic in the forum. Some people prefer it to most commercial stuff. Dpropicweb consolidated the recipes, tips, and discussion into a Flux, Flux, Flux wiki page.
Not a morning person? Try this automated dorm room. Curtains open, eggs boil, and bread is toasted, all automatically. The motor mounts and gearing for the curtains are machined and laser cut. So here was my approach; Use a motor to pull the curtains and use a remote set to control the kettle and oven. […]
Torwag started a thread in the forum with lots of interesting tips for taking macro pictures of PCBs without buying an expensive macro lens: Many here know how difficult it could be to do good detailed images of your project. A lot of point and shoot cameras are not up to this (macro) task. DSLRs […]
This 5x5x5 LED cube uses a microphone and op-amp to react to sound. It’s run via an Atmega328P with an Arduino bootloader: ok, it is nothing new and far away from well done.. But its just amazing for me to see it working and i learned quiet a lot :) I just want to share […]
Pantelis designed and built a DIY soldering station for mains powered soldering irons. He added a thermocouple temperature sensor to the heater, and controls the power to it via a microcontroller. The whole project is documented in pictures. Via PCB heaven.
Protocols like SPI, I2C, and UART are intended for chips sharing a PCB, lots of problems crop up when you try to send them over long distances. Michu designed individually controllable LED modules controlled by SPI signals sent over long lengths of cable. Initially he had lots of noise and buggy control. After some debugging […]
Robert designed this awesome looking headphone amplifier. The circuit is assembled without a PCB, and done very ascetically. It looks so good without a case, that it would have been a shame to stick in a plastic box. So he pored some clear acrylic into a mold, and made this cool looking case. Via PCB […]
Diyaudioprojects feature a DIY tube-mosfet hybrid headphone amplifier. It uses 12AU7 tubes and the IRF510 mosfet. The schematics, and pcb files are available on their site. The circuit consists of two stages: 1. a common cathode tube volt amp stage (gain), 2. a MOSFET source follower for current gain (with a LM317 regulator used as […]
Palma made a USB development board for the PIC18F2550. These chips are really popular, and there is a bunch of projects floating around the internet with them, even our own USB IR Toy, and USB LCD Backpack use them. This board is basically a breakout board, with decoupling capacitors, and a USB jack. We like […]
John demonstrates how to interface a vintage LED display with the Arduino. The display in question is a HP 5082-745 model, found in calculators, and other products from this manufacturer in the ’70s. Using the display is very easy – kudos to the engineers at HP for making a simple design that could be reusable […]
Here is an article from IKALOGIC describing how to implement CMOS cameras as sensors in 8bit microcontrollers. Processing color video in real time requires powerful DSPs or MCUs, but by downgrading the image to gray-scale, and using a lower resolution, processing becomes much easier to handle, so even small 8bit MCUs can handle it Many […]
Kerry wrote a tutorial on how to use the MSP430 LaunchPad to program external (off board) standalone MSP430 microcontrollers. To program an external MSP430G2 device, you need to simply remove all the jumpers from the LaunchPad develpment board and connect the TEST, RST and ground pins with your target device (see picture below). Since the […]
Here is a project describing how to build a DIY USB slingshot joystick. The platform is based on a small NXP LPC11U24 breakout board with USB capability, a 3-axis sensor, and a stretch sensor. It is all incorporated into real slingshot frame. It was inspired as a demo to show off how easy it is […]