Spare parts pulled together into a Nixie clock

We’d like to dig around in [Small Scale Research's] parts bin. Apparently there’s good stuff in there because he managed to build this Nixie tube clock using mostly leftovers.

The chip driving the device is an ATtiny1634. We weren’t familiar with it so here’s a datasheet (pdf) if you’re curios as well. The microcontroller communicates with an old GPS module in order to keep perfect time. There is an external antenna for it which connects through the hole next to the red switch seen above. The high voltage driver is a repurposed backlight inverter which is fed 12V power from an old laptop supply.

The album linked above shows the build quite well and even includes full schematics. There are some fireworks when he encountered an issue with a pretty large cap shorting to a resistor leg. If this isn’t enough juicy detail for you there are a few more nuggets shared in the Reddit comments.

Arduino data logger maps out the potholes on your morning commute

Now you can prove that you have the bumpiest commute in the office by measuring how rough your ride actually is. [Techbitar] calls the project the Bump-O-Meter. It uses an Arduino, GPS, and accelerometer to map out rough roads.

The hardware was built on a breadboard and [Techbitar] goes into detail about connecting and communicating with each module used. Once it’s running, the logger will read up to six sensors and record them to an SD card. In the video after the break he shows the method used to dump and graph the data. He starts by looking at the data in a spreadsheet. There are many fields included in the file but only three of them are needed to graph what is seen above. After narrowing down the number of columns he heads over to GPS Visualizer and uploads the data set which is then automatically plotted on the map.

In a Utopian society all city owned vehicles would have a system like this and the bad sections of road would automatically appear on the road crew’s repair list.

Continue reading “Arduino data logger maps out the potholes on your morning commute”

Stacking GPS, GSM, and an SD card into an Arduino shield

A few years ago, [Phang Moh] and his compatriots were asked by a client if they could make a vehicle tracking device for oil tankers all around Indonesia. The request of putting thousands of trackers on tanks of explosives was a little beyond [Phang Moh]‘s capability, but he did start tinkering around with GPS and GSM on an Arduino.

Now that tinkering has finally come to fruition with [Phang]‘s TraLog shield, a single Arduino shield that combines GPS tracking with a GSM and GPRS transceiver. There’s also an SD card thrown in for good measure, making this one of the best tracking and data logging shields for the Arduino.

The shield can be configured to send GPS and sensor data from devices attached to an I2C bus to remote servers, or a really cool COSM server. [Phang] is selling his TraLog for $150, a fairly good deal if you consider what this thing can do.

Seems like the perfect piece of kit for just about any tracking project, whether you want to know the location of thousands of oil tankers or just a single high altitude balloon.

Tip ‘o the hat to [Brett] for finding this one.

Cellular vehicle information and control

This hardware, which was built as a Computer Engineering project by [Bryon] and his classmates, gives you feedback and control of a car though a cellular phone network. It uses text messages to communicate with a control device. This can be pretty much any cellphone, but in the clip after the break they show off an Android app which puts a pretty GUI in front of you and abstracts away the tedium of specially formatted messages.

At the heart of the system is an Arduino Mega board. It has a cellular shield with an external antennae for connectivity. A GPS device, relay board, and ODB-II module provide feedback and control to the system. The relays allow the car to be started and the doors to be locked. The GPS and ODB-II module can send back location and vehicle information (anything available from the car’s sensors). There were some issues with the text messages being blocked during testing. The team thinks that the automated back-and-forth triggered some kind of spam filter from the telecom.

There’s still more work to be done if they want to actually drive the car via remote control.

Continue reading “Cellular vehicle information and control”

Make cell phone calls with your Arduino

Cellular shields for the Arduino have been around for ages, but this is the first one we’ve seen that turns your Arduino into a proper cell phone.

The shield is based around the SIM900 GSM/GPRS radio module, and is compatible with the SIM908 GSM/GPRS module that adds a GPS receiver. Also on board this shield are a pair of 1/8″ audio jacks, perfect for connecting a microphone and headphones. Yes, you can actually make cell phone calls with your Arduino now.

The real star of this build is the new GSM Shield library. This library of code includes the methods necessary for an Arduino to function as a cell phone (answer, hang up, dial a number), but also includes a lot of improvements for TCP/IP communication.

Even though the cost of getting an Arduino communicating through a GSM or GPRS network is fairly high, we’re thinking this would be the perfect starting point for a completely open source, open hardware cell phone. A phone with the same functionality as an old Nokia brick that is also a MiFy would be an amazing piece of hardware, and would surely make for a profitable Kickstarter.

Real time GPS decoding with software defined radio

In case the Realtek RTL2832u-based USB TV tuner dongle isn’t useful enough, the folks behind a project to get a software defined GPS receiver off the ground successfully plotted GPS data in real-time with this very inexpensive radio.

Previously, we’ve seen these dongles grab data from GPS satellites - useful if you’re building a GPS-based clock – but this build required hours of data collection to plot your location on a map.

The folks working on the GNSS-SDR project used an RTL2832 USB TV tuner and a Garmin active GPS antenna to track up to four GPS satellites in real-time and plot a location accurate to about 200 meters.

The Google Earth plot for this post shows the data collected by the GNSS-SDR team; the antenna was fixed at the red arrow for the entirety of the test, and the  yellow lines represent a change in the calculated location every 10 seconds. Amazing work, and only goes to show what this remarkable piece of hardware is capable of.

GPS dog collar keeps track of your walks

[Becky Stern] came up with a way to make sure you and your dog are getting enough exercise. It’s a dog collar mounted GPS that measures how far you have walked. Just set your target distance and the progress bar in the middle of this flower will let you know when you reached it.

The most obvious piece of hardware is the OLED board which is sticking out like a sore thumb. But if you’d like to be a little more discreet you could forego the full-featured display for some carefully places LEDs to make up a circular progress bar. The GPS module itself fits well in the center of the flower, which [Becky] shows us how to make out of wire-edged ribbon. Hidden on the other side is an ATmega23u4 breakout board running the Arduino bootloader.

If you’re interested in sewables and textiles [Becky] uses a lot of basic techniques that are good to learn. Check it out in the clip after the break. She’s always shown a remarkable ability to develop projects which won’t scare away the villagers in the way our wire-sprouting breadboard hacks sometimes do.

Continue reading “GPS dog collar keeps track of your walks”