Updating a 1999 Saab with an Arduino

Unless your car is fresh off the lot, you’ve probably had the experience of riding in a newer car and seeing some feature or function that triggered a little pang of jealousy. It probably wasn’t enough for you to run out and sign yourself up for a new car loan (which is what the manufacturer was hoping for), but it was definitely something you wished your older model vehicle had. But why get jealous when you can get even?

[Saabman] wished his 1999 Saab 9-5 had the feature where a quick tap of the turn signal lever would trigger three blinks of the indicator. Realizing this was an electronic issue, he came up with a way to retrofit this function into his Saab by adding an Arduino Pro Micro to the vehicle’s DICE module.

The DICE (which stands for Dashboard Integrated Central Electronics) module controls many of the accessories in the vehicle, such as the lighting and wipers. In the case of the blinkers, it reads the state of the signal lever switches and turns the blinkers on and off as necessary. After poking around the DICE board, [Saabman] found that the 74HC151 multiplexer chip he was after: the state of the blinker switches could be read from pins 1 and 2, and he’d even be able to pull 5 V for the Arduino off of pin 16.

After prototyping the circuit on a breadboard, [Saabman] attached the Pro Micro to the top of the 74HC151 with some double sided tape and got to work on refining the software side of the project. The Arduino reads the state of the turn signal switches, and if they flick on momentarily it changes the pin from an input to an output and brings it high for three seconds. This makes the DICE module believe the driver is holding the turn lever, and will keep the blinkers going. A very elegant and unobtrusive way of solving the problem.

Hackers aren’t complete strangers to the garage; from printing hard to find parts to grafting in their favorite features from other car manufacturers, this slick Saab modification is in good company.

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Animated Bluetooth Bike Turn Signals

Tired of risking his life every time he had to signal a turn using his hands while riding his bicycle in rainy Vancouver, [Simon Wong] decided he needed something a bit higher tech. But rather than buy something off the shelf, he decided to make it into his first serious Arduino project. Given the final results and the laundry list of features, we’d say he really knocked this one out of the park. If this is him getting started, we’re very keen to see where he goes from here.

So what makes these turn signals so special? Well for one, he wanted to make it so nobody would try to steal his setup. He wanted the main signal to be easily removable so he could take it inside, and the controls to be so well-integrated into the bike that they wouldn’t be obvious. In the end he managed to stuff a battery pack, Arduino Nano, and an HC-05 module inside the handlebars; with just a switch protruding from the very end to hint that everything wasn’t stock.

On the other side, a ATMEGA328P microcontroller along with another HC-05 drives two 8×8 LED matrices with MAX7219 controllers. Everything is powered by a 18650 lithium-ion battery with a 134N3P module to bring it up to 5 VDC. To make the device easily removable, as well as keep the elements out, all the hardware is enclosed in a commercial waterproof case. As a final touch, [Simon] added a Qi wireless charging receiver to the mix so he could just pull the signal off and drop it on a charging pad without needing to open it up.

It’s been some time since we’ve seen a bike turn signal build, so it’s nice to see one done with a bit more modern hardware. But the real question: will he be donning a lighted helmet for added safety?

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DIY Bike Brake Light And Turn Signals

If you ever take your bike out and share the road with large automobiles, you know that sometimes it can get a little hairy. As a biker, you will stand no chance in a collision with a vehicle. Communicating your intentions, i.e. turning and braking, can certainly reduce your risk of getting in an accident. [Mike] didn’t like the traditional idea of taking a hand off the handlebars in order to signal to traffic so he did something about it, he built turn signals and a brake light for his bike.

The business end of this project is the rear-facing light bar mounted under the rider’s seat. It is made from Radio Shack project boxes and mounted to an off-the-shelf L bracket. A bunch of LEDs were installed in the project boxes, the yellow turn signal LEDs are arranged in the shape of arrows and the red brake light LEDs are in an oval. Inside the project boxes you will find the 9v battery that powers the circuit and also a breadboard that is home to the circuits responsible for blinking the turn signals.

DIY Bike Turn Signals

Check out the switch assembly that is mounted to the handle bars. It was built using an old reflector bracket which was already the correct size to mount to handle bars. As you would expect, there is a toggle switch for turning the turn signals on and off. A little bit more interesting is the brake switch. It is a hinge-lever style limit switch and positioned in a manner such that it is activated when the brake lever is pulled. There is no additional thought or effort required on the cyclist’s part!

Something that is certainly not expected on the switch assembly is the headphone jack. [Mike] likes to listen to music while he rides and a cord dangling around from a backpack or bike bag gets in the way. On the rear light bar, there is a headphone jack that allows an MP3 player to be plugged into. The audio signals travel up the same CAT5 cord used for the turn and brake signals. This allows only a short run of headphone cable from the handlebars to [Mike’s] ears.

Kenyan Teen’s Invention Protects Cattle and Lions

Lion Scarecrow

[Richard’s] community in Kenya had a problem. The people depended on local livestock for survival, but the local lion population had started consuming that very same food source. The result was that people suffered from loss of the livestock, but the lions also suffered when the people killed them to protect their source of food. [Richard] knew he could do something to help both his community, and the lion population. He ended up building a lion attack prevention system.

He first tried a sort of scarecrow, to keep the lions away from the cattle. Unfortunately the lions proved to be too “tricky” and quickly realized that the scarecrows were no threat. Then one day, [Richard] was working with a flashlight. This led him to realize that the lions seemed to be afraid of moving light. That gave him the idea for his invention.

He had previously taken apart his mothers new radio, much to her dismay. He learned a lot about electronics in the process. He combined his electronics knowledge with this new knowledge about lions, to create his lion attack prevention system. The core component is the turn signal circuit from a motorbike. The circuit is hooked up to a rechargeable battery and a solar cell. This all runs through a switch so [Richard] can turn it on only when needed. The circuit is switched on at night to keep the lions away. [Richard] claims that they have experienced no lion attacks since the system was put in place two years ago!

This protects both the local cattle as well as the lions themselves. The whole thing is powered from the sun, so it’s likely to last a very long time. This kind of project may seem simple to many readers, but it’s a great example of the good ideas and ingenuity that can grow out of necessity. Oh, did we mention that [Richard] is only 13 years old? His invention is now reportedly being used all over Kenya and has led [Richard] to receive a scholarship to what he calls “one of the best schools in Kenya”.

While this hack has clearly changed the lives of many people in [Richard’s] region. You don’t have to make something overly complicated to change the world.

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Brake Light Backpack overpowered with LED pixels

led-motorcycle-backpack

Here’s another Flora Arduino based project from [Becky Stern]. It’s a backpack with brake lights and turn signals for use when motorcycling, but it should work just as well for bicyclists. From this view the project looks pretty normal, but things get downright crazy when she decided to use the WS2801 pixels for the LEDs. Sure they take all the work out of driving an array of LEDs, and they offer full color and dimming levels. But when you see the bulk of cabling and PCBs this adds to the project (shown in the video after the break) we think you’ll agree that this was an interesting choice.

That issue aside the project is a lot of fun. The system doesn’t patch into the motorcycle’s electronics. Instead, it uses an accelerometer to detect when the brakes are applied and light the LEDs according. The turn signals are switched with an RF remote control that can be mounted on the handlebars.

Anyone looking to hack outerwear with electronics can learn form the fabrication techniques used here. [Becky] details how to make holes in the bag and sew parts to them, as well as using Sugru to waterproof vulnerable components.

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Fabricating headlights for an F250

The amount of time that is going into these custom headlights is just staggering. [Mcole254] is working on his brother’s truck, replacing the stock headlights with High-Intensity Discharge (HID) lamps and rolling some nice LED features into the mix while he’s at it.

The build starts by removing and disassembling the stock headlight assembly. In order to get the enclosure apart he heated it in the oven until the glue was softened and the parts could be pried apart. The goal is to replace the reflectors with an assembly that suits the new lamps and LEDs. Above you can see the white pieces which were vacuum formed from a mold that [Mcole254] made from wood and PVC. He tried several iterations using his home-made vacuum former but couldn’t get the definition he really wanted. The most recent posts from him show some massive 3D printed parts that will be used instead.

While inside he added a line of amber LEDs for the turn signal. You can seem them mounted along the silver strip between the upper and lower reflectors. A demo of those super bright additions is embedded after the break.

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Animated turn signals add a little bit of Cylon to your automobile

[StarfireMX] churned out a fantastic turn signal replacement for his Mustang. When he switches on his blinker, a chasing pattern of amber LEDs is shown on the front corner of his car. Pretty cool, and as far as we can tell this is still street legal. But once he gets onto private property [StarfireMX] can have a little bit more fun with the replacements. The LEDs are actually fully addressable RGB modules. They can display a variety of colors and patterns, with wireless control from a touch-screen unit he also built.

Both the turn signal unit, and the remote controls are Arduino driven with XBee modules for wireless communications. Pop the hood and you’ll find even more blinky lights to accent the engine, which are also tweaked using the remote control.

Don’t miss the demonstration video after the break. Near the end of the clip you can see how the controller is mounted with heavy-duty Velcro behind the grill. Inside the project box there’s a voltage regulator which drops the 12V down to 5V and can put out a whopping four amps to make sure the LEDs have plenty of current.

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