Pinguino32-DIY PIC32 development board with the Pinguino bootloader

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.

Replacing resistor arrays with single 0603 resistors

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 […]

DIY Arduino 6-channel temperature monitor

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 […]

Adding a thermometer to your digital multimeter

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 […]

Homebrew electronic tubes

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 […]

Waking up is easy with automated breakfast and curtains

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. […]

DIY tube-mosfet hybrid headphone amplifier

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 […]

Another PIC18F2550 USB development board

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 […]

Interfacing Arduino with an HP LED display from the ’70s

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 […]

Interfacing CMOS cameras to 8bit microcontrollers.

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 […]

Using the MSP430 LaunchPad to program MSP430 microcontrollers

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 […]