KMel Robotics flying robots that can play instruments: Just a reminder about how this all works: each one of these robots has its position measured down to the millimeter (or better) at a very high frequency using an external localization system. The individual hexrotors themselves are being centrally controlled by a computer somewhere else, sort […]
Author Archives: DP
A small GPS Arduino watch/clock
Here’s Oscar Liang another Arduino GPS project, he writes: Garlow stands for GPS Arduino Rechargeable Logger OLED Watch. The device gives GPS information which is logged on SD card and shown on a OLED display. It can be carried as a watch or simply used as a GPS data logger. The whole system is based on Arduino […]
A simple posture sensor
Here’s a simple cure for your posture and the back pain blues, a posture sensor by Wingman: The simplest distance sensors are ultrasonic or infrared sensors. I went with a SR-HC04 because it is cheap and sufficiently precise. There are no special requirements to the controller so I am using an Attiny85. A small piezo speaker provides acoustic […]
Hacker Camp Shenzhen Day 1: Surviving Shenzhen, Chinese Lesson, Market
By ian Ian @ Dangerous Prototypes discusses survival in Shenzhen and Huaqiangbei Electronics Market etiquette, Jin @ FlyLin gives a short Chinese lesson. Morning discussions from Hacker Camp Shenzhen 2014, Thursday April 3rd. Presentations, pictures, and overview here. Via Hacker Camp Shenzhen mini-site: Hacker Camp Shenzhen Day 1: Surviving Shenzhen, Chinese Lesson, Market
Digispark Pro – tiny, Arduino ready, USB and mobile dev board
Ihsan informs us of Digitstump’s inexpensive, tiny Arduino IDE ready, USB and mobile dev board, the Digispark Pro: Serial over USB debugging, USB programmable, 14 i/o, SPI, I2C, UART, USB Device Emulation, Mobile Development Ready, Optional BT, BLE, Mesh, and Wi-Fi. The super small, dirt cheap, always open source, Arduino compatible, USB (and Mobile and Wireless!) development […]
Proto I/Os Arduino
Ricardo of Electropepper writes about their latest project: Now i want to show you my most recent project, an arduino shield aimed for prototyping, it has 8 LEDs, four buttons a buzzer and a temperature sensor, like everything else in my website its all open source, you can check the project here Via the contact form. […]
The final key – Hardware password manager
The final key – Hardware password manager by cyberstalker.dk The Final Key is a piece technology that solves a problem. The Final Key is a hardware password manager with encryption and focus on combining portability, compatibility security and easy of use. It is a hobbyproject of mine and not under any commercial distribution, you are also free […]
Cleanly de-soldering a pin header
boldport has written an article describing a technique he’s used for removing the header cleanly: Know that sinking feeling after realising that you’ve soldered that 40-pin header on the wrong side of the board? I’ve come up with a technique that works for me for removing the header cleanly and I describe it in the video.
Hacker Camp Shenzhen Day 3: Big Hacker Shaokao (BBQ)
By ian Time flies! No one believes this is the last day of Hacker Camp Shenzhen. There’s just one event left. A Hacker Shaokao (BBQ), and every hacker in Shenzhen is invited. Once again, we gathered at Exit C of Science museum metro stop, where every event started throughout the whole workshop. See the hacker […]
Hacker Camp Shenzhen Day 3: Office Hunting, Labor Supply, Starting a Business
By ian Day 3, the final day of Hacker Camp Shenzhen. If you’re in love and you’ve decided to stay, Ian @ Dangerous Prototypes shows how to find a home and office. Presentation here.
chipKIT Project 4: Digital light meter
Raj of Embedded Lab has a series of chipKIT tutorials. This 4th project of a series will show you how to build a digital light meter using the chipKIT Uno32 board and the BH1750 digital light sensor: A light meter is used to measure the intensity of illumination in a given area. It is widely […]
16F1509 ramp generator using the internal 5-bit DAC
Charles Douvier of PNW/Electronics writes: Turns out the DAC is probably the easiest peripheral I’ve used on the PIC. It took me longer to wait for the PICKit to update from 18F configuration to 16F. BUT.. if you’re having issues.. here you go: A simple voltage follower (or however you want to buffer the output) […]
#FreePCB via Twitter to 2 random RTs
Every Tuesday we give away two coupons for the free PCB drawer via Twitter. This post was announced on Twitter, and in 24 hours we’ll send coupon codes to two random retweeters. Don’t forget there’s free PCBs three times a every week: Hate Twitter and Facebook? Free PCB Sunday is the classic PCB giveaway. Catch […]
Hacker Camp Shenzhen Day 2: BBQ dinner
By ian We raided the local BBQ place near the hacker camp hotels. We call it ‘South Park BBQ’ because it’s along South Park (Nanyuan) road. Bonus fact: South Park Elementary is next door! More below!
Hacker Camp Shenzhen Day 2: Export, Import, Shipping, Sourcing Agents
Hacker Camp Shenzhen, day 2, down to business with talks about sourcing agents, shipping, exporting, and importing. Guest speakers include Connie @ ArcBotics, Tully @ Samarai Circuits & Factory For All, and local sourcing agent Hanlai.
Optical mouse video output hack
The $5 mouse that you just tossed in the garbage might have had some hackable life still in it. As Conor Peterson shows us most optical mice are actually quite simply in operation with most of the hard work being done by the low resolution camera sensor. With a bit of Arduino code he was able to […]
Reverse engineer wireless temperature / humidity / rain sensors, part 1
Ray Wang writes: I just wrote a series of three posts about how I reverse engineered a few off-the-shelf wireless temperature, humidity sensors and rain gauge, and used an Arduino to listen to and decode the sensor data. The tools involved are quite simple: an Arduino and a 433MHz RF receiver. I also used a […]
Audible Morse code to text message converter
Dilshan Jayakody writes: Morse View is an open source software project to convert audible Morse codes to text messages. This application is capable to convert Morse codes from wave files or from the audio line/microphone inputs. Conversion from Morse code to text can perform based on amplitude and frequency decomposition of the input audio stream. […]
Hacker Camp Shenzhen Day 3: Soldering workshop
By ian Hacker Camp Shenzhen’s main event, the BGA reballing course, continues for a second day. At this point most people had reballed a chip, or were close to finishing. For the rest of the day out instructor, a master solder ninja, took on every challenge we tossed at him. Before the workshop stated though, […]
Hacker Camp Shenzhen Day 2: Soldering workshop
By ian Hacker Camp Shenzhen’s main event is a two day soldering course at a mobile phone repair school in Huaqiangbei. They teach a technique to replace the solder balls used to connect modern BGA chips to circuits boards. Usually this process requires special machinery, but the repair school teaches a simple hand technique that […]