Engineers produce the world’s longest flexible fiber battery

Researchers have developed a rechargeable lithium-ion battery in the form of ultra-long fiber that could be woven into fabrics. The battery could enable a wide variety of wearable electronic devices, and might even be used to make 3D-printed batteries in virtually any shape.

Quiz

It’s time for a quiz! A brief quiz with basic electrical questions is in front of you. If you obtain a score of greater than 90%, you’ll be qualified to win a soldering iron! Good luck and have fun!

Christmas Countdown Quiz

What unit is used to measure Current?(Required)

Ampere [A]

Ohm [Ω]

Volt [V]

What flows in a circuit?(Required)

Current

Resistance

Voltage

In the following image, you can see a symbol of(Required)

Resistor

LED

Battery

Using this part of the multimeter you are measuring(Required)

DC current

DC voltage

AC voltage

If you’re not able to read the colour bands of a resistor, what’s the easiest way to find its value?(Required)

With a soldering iron

With an oscilloscope

With a multimeter

What component is this?(Required)

Diode

Capacitor

Transistor

What’s the formula (Ohm’s law) for calculating voltage?(Required)

V = R x I

V = R / I

V = I / R

What’s the most correct way to finish this sentence: “The capacitor works similar to…”(Required)

...a light bulb

...a remote control

...a battery

Which one of these components can create light?(Required)

LED

Transistor

Resistor

What happens if you connect a resistor with low value, directly between the plus and minus of a battery?(Required)

The resistor lights up

The battery lights up

The resistor becomes warm

Optional: Email

Please provide your email address if you want to be considered for the prize.

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Ask Us Anything

This post will be a little different from the others.

Do you have any questions regarding electronics? Are you stuck on a project and don’t know how to move forward? Do you have questions about Ohmify? Or anything else relating to electronics? Then ask us below, in the comment section.

The Ohmify team is looking forward to responding to all of your questions!

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Soft semiconductors that stretch like human skin can detect ultra-low light levels

Researchers have demonstrated a new photodetector material that acts like a second skin layer and is up to 200% more stretchable than its original dimension without significantly losing its electric current. The researchers say the soft flexible photodetectors could enhance the utility of medical wearable sensors and implantable devices, among other applications.

Ohmify Gift Cards are now available

A year of learning and building electronics can take you from knowing nothing to being able to build pretty advanced projects.

Is there someone in your life that is (or could be) interested in electronics?

We are now offering gift cards for a 1-year membership to Ohmify + a starter’s component kit.

The person you give it to can redeem the gift card when they want to get the component kit and a year-long membership with access to all of the courses, tutorials, and projects at Ohmify.

They will also have access to a community forum where my team and I are ready to help with whatever they’re struggling with.

Maybe they’ll thank you with a homemade present next year ;)

Click here to purchase a gift card to Ohmify

Also – if they use the gift card before the end of the year – they’ll get six downloadable eBooks as a Christmas bonus.

(The Christmas bonus is also available for existing members in the Trainings Library.)

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E-waste recycling emits emerging synthetic antioxidants

Manufacturers add synthetic antioxidants to plastics, rubbers and other polymers to make them last longer. However, the health effects of these compounds, and how readily they migrate into the environment, are largely unknown. Now, researchers have detected a broad range of emerging synthetic antioxidants, called hindered phenol and sulfur antioxidants, in dust from electronic waste (e-waste) recycling workshops, possibly posing risks for the workers inside.

With fuzzy nanoparticles, researchers reveal a way to design tougher ballistic materials

Researchers have discovered a new method to improve the toughness of materials that could lead to stronger versions of body armor, bulletproof glass and other ballistic equipment. The team produced films composed of nanometer-scale ceramic particles decorated with polymer strands (resembling fuzzy orbs) and made them targets in miniature impact tests that showed off the material's enhanced toughness. Further tests unveiled a unique property not shared by typical polymer-based materials that allowed the films to dissipate energy from impacts rapidly.