A Flexible Sensor That Moves With You

See the original posting on Hackaday

If you have a project in mind that requires some sort of gesture input or precise movements, it might become a nettlesome problem to tackle. Fear this obstacle no longer: a team from the Wyss Institute for Biologically Inspired Engineering at Harvard have designed a novel way to make wearable sensors that can stretch and contort with the body’s natural movements.

The way they work is ingenious. Layers of silicone are sandwiched between two lengths of silver-plated conductive fabric forming — by some approximation — a capacitance sensor. While the total surface area doesn’t change when the sensor is stretched …read more

Nixie Tachometer Displays in Style

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Nixietach II is a feature-rich tachomoter [Jeff LaBundy] built for his 1971 Ford LTD. It displays RPM with an error rate of only 0.03 RPM at 1,000 RPM

The latest iteration of a long-running project, [Jeff] approached it with three goals: the tachometer had to be self-contained and easy to install, the enclosure had to be of reasonable size, and it had to include new and exciting features over the first two versions.

The finished project consists of an enclosure mounted under the dash with a sensor box in the engine bay connected to the ignition coil. He can also …read more

Nixie Tachometer Displays in Style

See the original posting on Hackaday

Nixietach II is a feature-rich tachomoter [Jeff LaBundy] built for his 1971 Ford LTD. It displays RPM with an error rate of only 0.03 RPM at 1,000 RPM

The latest iteration of a long-running project, [Jeff] approached it with three goals: the tachometer had to be self-contained and easy to install, the enclosure had to be of reasonable size, and it had to include new and exciting features over the first two versions.

The finished project consists of an enclosure mounted under the dash with a sensor box in the engine bay connected to the ignition coil. He can also …read more

A Flexible Sensor That Moves With You

See the original posting on Hackaday

If you have a project in mind that requires some sort of gesture input or precise movements, it might become a nettlesome problem to tackle. Fear this obstacle no longer: a team from the Wyss Institute for Biologically Inspired Engineering at Harvard have designed a novel way to make wearable sensors that can stretch and contort with the body’s natural movements.

The way they work is ingenious. Layers of silicone are sandwiched between two lengths of silver-plated conductive fabric forming — by some approximation — a capacitance sensor. While the total surface area doesn’t change when the sensor is stretched …read more

Stealing Joules From An Aluminium-Air Battery

See the original posting on Hackaday

While batteries are cheap and readily obtainable today, sometimes it’s still fun to mess around with their less-common manifestations. Experimenting with a few configurations, Hackaday.io user [will.stevens] has assembled an aluminium-air battery and combined it with a joule thief to light an LED.

To build the air battery, soak an activated charcoal puck — from a water filter, for example — in salt-saturated water while you cut the base off an aluminium can. A circle of tissue paper — also saturated with the salt water — is pressed between the bare charcoal disk and the can, taking care not to …read more

Quick Hack Cleans Data from Sump Pump

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Nobody likes to monitor things as much as a hacker, even mundane things like sump pumps. And hackers love clean data too, so when [Felix]’s sump pump water level data was made useless by a new pump controller, he just knew he had to hack the controller to clean up his data.

Monitoring a sump pump might seem extreme, but as a system that often protects against catastrophic damage, the responsible homeowner strives to take care of it. [Felix] goes a bit further than the average homeowner, though, with an ultrasonic sensor to continually measure the water level in the …read more

Fail of the Week: Good Prosthetic Hand Design Goes Bad

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Is this a case of a good design gone wrong in the build phase? Or is this DIY prosthetic arm a poor design from the get-go? Either way, [Will Donaldson] needs some feedback, and Hackaday is just the right place for that.

Up front, we’ll say kudos to [Will] for having the guts to post a build that’s less than successful. And we’ll stipulate that when it comes to fully articulated prosthetic hands, it’s easy to fail. His design is ambitious, with an opposable thumb, fingers with three phalanges each, a ball and socket wrist, and internal servos driving everything. …read more

Fail of the Week: Good Prosthetic Hand Design Goes Bad

See the original posting on Hackaday

Is this a case of a good design gone wrong in the build phase? Or is this DIY prosthetic arm a poor design from the get-go? Either way, [Will Donaldson] needs some feedback, and Hackaday is just the right place for that.

Up front, we’ll say kudos to [Will] for having the guts to post a build that’s less than successful. And we’ll stipulate that when it comes to fully articulated prosthetic hands, it’s easy to fail. His design is ambitious, with an opposable thumb, fingers with three phalanges each, a ball and socket wrist, and internal servos driving everything. …read more

Quick Hack Cleans Data from Sump Pump

See the original posting on Hackaday

Nobody likes to monitor things as much as a hacker, even mundane things like sump pumps. And hackers love clean data too, so when [Felix]’s sump pump water level data was made useless by a new pump controller, he just knew he had to hack the controller to clean up his data.

Monitoring a sump pump might seem extreme, but as a system that often protects against catastrophic damage, the responsible homeowner strives to take care of it. [Felix] goes a bit further than the average homeowner, though, with an ultrasonic sensor to continually measure the water level in the …read more

Where a Wood Shop Goes, a Hackerspace Follows

See the original posting on Hackaday

The 2×4 Contest at my local hackerspace captured my interest. The challenge was to build something cool out of a single eight-foot 2×4 with the winner getting free wood storage in the space. I had half an idea for a project, but I ran out of time and never even started it. My idea was to cut the board into half-thickness strips and glue them edge-to-edge with some biscuits holding them together — to basically make wider, thinner boards to do… something cool with it.

One of the entries is pictured above. [Jon Alt] designed this clock and phone charger …read more

Stealing Joules From An Aluminium-Air Battery

See the original posting on Hackaday

While batteries are cheap and readily obtainable today, sometimes it’s still fun to mess around with their less-common manifestations. Experimenting with a few configurations, Hackaday.io user [will.stevens] has assembled an aluminium-air battery and combined it with a joule thief to light an LED.

To build the air battery, soak an activated charcoal puck — from a water filter, for example — in salt-saturated water while you cut the base off an aluminium can. A circle of tissue paper — also saturated with the salt water — is pressed between the bare charcoal disk and the can, taking care not to …read more

OpenEMS Makes Electromagnetic Field Solving… Merely Difficult

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To ordinary people electronics is electronics. However, we know that the guy you want wiring your industrial furnace isn’t the guy you want designing a CPU. Neither of those guys are likely to be the ones you want building an instrumentation amplifier. However, one of the darkest arts of the electronic sects is dealing with electromagnetic fields. Not only is it a rare specialty, but it requires a lot of high-powered math. Enter OpenEMS, a free and open electromagnetic field solver.

We would like to tell you that OpenEMS makes doing things like antenna analysis easy. But that’s like saying …read more

Where a Wood Shop Goes, a Hackerspace Follows

See the original posting on Hackaday

The 2×4 Contest at my local hackerspace captured my interest. The challenge was to build something cool out of a single eight-foot 2×4 with the winner getting free wood storage in the space. I had half an idea for a project, but I ran out of time and never even started it. My idea was to cut the board into half-thickness strips and glue them edge-to-edge with some biscuits holding them together — to basically make wider, thinner boards to do… something cool with it.

One of the entries is pictured above. [Jon Alt] designed this clock and phone charger …read more

OpenEMS Makes Electromagnetic Field Solving… Merely Difficult

See the original posting on Hackaday

To ordinary people electronics is electronics. However, we know that the guy you want wiring your industrial furnace isn’t the guy you want designing a CPU. Neither of those guys are likely to be the ones you want building an instrumentation amplifier. However, one of the darkest arts of the electronic sects is dealing with electromagnetic fields. Not only is it a rare specialty, but it requires a lot of high-powered math. Enter OpenEMS, a free and open electromagnetic field solver.

We would like to tell you that OpenEMS makes doing things like antenna analysis easy. But that’s like saying …read more

Four Chords Should Be Enough For Anyone

See the original posting on Hackaday

You might be surprised at how many pop songs are exactly the same. Cat Scratch Fever is the exact same song as Smoke on the Water. Even one of Yeezy’s songs is strikingly similar to a weird 90s French electronic group. Musically, though, there are an incredible number of songs that follow a I-V-vi-IV progression. Let it Be is one of them, as is Beast of Burden. aLady Gaga’s Poker Face is another. Now, finally, we have automated most of the pop songs you know and love. [Sven] has created a small MIDI device that only plays a I-V-vi-IV progression, …read more

Unholy Mashup Of SpaceMouse And Sculpt Keyboard Is Rather Well Done

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What do you do if you have a pair of input device peripherals for your computer, but they are from different manufacturers and thus not available as a single unit? If you are [Marco van Nieuwenhoven], you combine the two to make a mashup single peripheral.

[Marco]’s two peripherals were a 3Dconnexion SpaceMouse Wireless, and a Microsoft Sculpt Keyboard. His mashup isn’t featured here because it simply is a mashup, after all anyone with a hot glue gun could combine the two, instead he’s created a single peripheral that almost looks as though it could have been manufactured that way. …read more

Edit Hex in the Browser

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If you can’t stand the thought of using an application in your browser, you might as well jump ahead to the comments and start flaming.

Still with us? Imagine this scenario. You are at the office, at a client’s site, at a school, or visiting your mom. Suddenly, for some strange reason, you need to edit a hex file. We don’t know why, but if you are reading Hackaday, it isn’t that big of a stretch to imagine it. What do you do? Download and install a hex editor? Maybe you can’t. Or, if it is mom’s computer, maybe you …read more

Give Your Bench Power Supply A Helping Hand

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[Sverd Industries] have created a pretty cool bench power supply integrating soldering helping hands into the build. This helps free up some much-needed bench space along with adding that wow factor and having something that looks quite unique.

The build is made from a custom 3D printed enclosure (Thingiverse files here), however if you have no access to a 3D printer  you could always just re-purpose or roll your own instrument enclosure. Once the enclosure is taken care of, they go on to install the electronics. These are pretty basic, using a laptop PSU with its output attached to the …read more

Four Chords Should Be Enough For Anyone

See the original posting on Hackaday

You might be surprised at how many pop songs are exactly the same. Cat Scratch Fever is the exact same song as Smoke on the Water. Even one of Yeezy’s songs is strikingly similar to a weird 90s French electronic group. Musically, though, there are an incredible number of songs that follow a I-V-vi-IV progression. Let it Be is one of them, as is Beast of Burden. aLady Gaga’s Poker Face is another. Now, finally, we have automated most of the pop songs you know and love. [Sven] has created a small MIDI device that only plays a I-V-vi-IV progression, …read more

Give Your Bench Power Supply A Helping Hand

See the original posting on Hackaday

[Sverd Industries] have created a pretty cool bench power supply integrating soldering helping hands into the build. This helps free up some much-needed bench space along with adding that wow factor and having something that looks quite unique.

The build is made from a custom 3D printed enclosure (Thingiverse files here), however if you have no access to a 3D printer  you could always just re-purpose or roll your own instrument enclosure. Once the enclosure is taken care of, they go on to install the electronics. These are pretty basic, using a laptop PSU with its output attached to the …read more

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