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Hackster.io

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Thanks to +Make: and Hackster, you can start harmonizing offline and online Maker initiatives, from Maker Faire to online communities and beyond.
Hackster and Maker Media have come together to digitize the world’s largest Maker community!
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Mike James

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Hello,

I want to try making my own paper pulp packaging for a project. It's how egg boxes are made - The Idea is to blend newspaper with hot water into pulp and put it into a mould. Now I don't have access to a vacuum press so I'm looking for any suggestions for moulding.

Thanks,

Mike
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John Bump's profile photoMike James's profile photo
5 comments
 
Great suggestions guys, I will commence trials soon and post the results.

Mike
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Dirt simple, idiot-proof continuity tester to free up an Arduino for better projects.
 
So, I've got an #electronics problem that's been bothering me most of this week. I built a continuity tester for the QA department at work. The reason for making it bespoke like that is to eliminate operator error. In other words, I had to idiot-proof it.
The tester has two big lights on it, one green and one red.
When the tester is powered on, the red light goes on.
If a part is inserted into the stand and completes the circuit, the red light goes off and the green light goes on. The schematic I linked is more or less how the tester works in principle. One LED is illuminated until it gets a signal from one of the analog pins (continuity), at which point it switches to the other LED.

The problem is that right now it's using an #Arduino to drive a pair of transistors to switch between two 12V high-powered LEDs. I say problem because I think using an Arduino for this is total overkill, even for idiot-proofing.

What I want to make is a continuity tester that runs two LEDs, red when on and green when continuity is detected, using the absolute bare minimum of components. I don't want anything more sophisticated than a #555 timer chip on this setup; just caps, resistors, transistors, and maybe a relay or two. There's plenty of #DIY continuity tester diagrams out there, but they all work on the ON/OFF principle when I need something more like A/B if that makes sense. 
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Cindy Thornton's profile photoBruce Fleming's profile photo
6 comments
 
If you want to keep the programmability of the project but use a smaller AVR, try adapting this tutorial: http://www.instructables.com/id/The-Idiots-Guide-to-Programming-AVRs-on-the-Chea/?ALLSTEPS#intro

You can learn how to program AVRs in C as an alternative. There are different tutorials such as this one: http://hackaday.com/2010/10/23/avr-programming-introduction/

Here is a book I am currently using: Make: AVR Programming, by Elliot Williams.

For either C experience, all you need is an Arduino to program your AVR: https://www.arduino.cc/en/Tutorial/ArduinoISP

Note in the sketch for the Arduino as ISP, you can add three LEDs that help with the device - Heartbeat - running progam, Error, and in communication with slave.
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I need help! I have a html page. I want to put a button on there that sends this: http://192.168.1.21/?r=0&g=0&b=0

I just don't want it to accually go to that page but only 'post' the data and stay on the same page.

I read something about doing it with ajax but i am unknown with ajax aswell as javascript and php.

Can anyone make me an example?
(I need 6 of those buttons on one page)
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Fredrik Wiberg's profile photoMano Biletsky (Open MAKER)'s profile photo
6 comments
 
I will try to do it myself, but if i can't manage it myself i will contact you.
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Aaron Maurer

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Students Need The Truth! http://wp.me/p4covo-1B3 
This is a request. A major game changing request. One that I think will not only challenge some of you to actually speak up, but one that will allow honesty and
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Vinay Shenoy

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Hey guys, Need a help. Iam working on a mini project. How can I control the direction of a small 5ft Meteorological/weather balloon? . The problem is that , the load bearing capacity of this kind of airborne balloon is very less of about 500gms. I have to equip the electronics which are about 400gms or so.Do I need to add propellers? If yes, what sort of ? I'm not in a position to sort this neither I am able to use a larger balloon.

Also let me know different ways of controlling an airborne balloon in terms of direction. Please help me folks asap!
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John Shovic

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SwitchDoc Labs has now made the cover three times in Raspberry Pi Geek Magazine. MouseAir, the I2C Mux and wind power on Project Curacao.
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John Shovic

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This series of articles discusses the use of XML for the Raspberry Pi. In part 3 we see how XML is used as a client/server application.
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Zach Hipps

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My nephew just made this video explaining how to make an audio pickup using a piezoelectric element and a simple preamp. He's just getting into the maker scene and I couldn't be more thrilled!
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Richard Reubenstone's profile photo
 
Zach, speaking of piezo-electric devices, check this out, a device to create and store energy from walking: http://bit.ly/2bEOWrY

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Vicky R.

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Hello ,do you know when the life for lights challenge winners will be announced? 
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Matthew Lawson

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Does anyone have a spare ZXMP6A13F 60 V P channel MOSFET SOT23 or equivalent? Both DigiKey and Mouser are back ordered and I need to make a repair to my radio before ARRL Field Day. Its for an Icom 821H. I have lost my transmit on 70cm. I am hoping someone has one in their parts drawer. If anyone knows of a supplier with them in stock that would be awesome too! Thanks in advance. 
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Matthew Lawson's profile photoLonnie Honeycutt's profile photo
6 comments
 
That's awesome Matthew.
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John Shovic

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New tutorial: measuring current on devices plugged into Raspberry Pi and Arduino projects with the INA3321 3 channel current device.
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John Shovic

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This is a tutorial for Grove Connector Projects. Three simple projects are described for the Raspberry Pi and Arduino with pictures and software.
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John Shovic's profile photoRichard Reubenstone's profile photo
3 comments
 
+John Shovic This is the type of collaborative project you will find on Collaborizm: 96 engineers from around the world came together to build a delivery drone car powered by #arduino. bit.ly/dronebot #drone
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Vinay Shenoy

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Hey guys! I am planning to do a hobbyist diy open source project this month. Can anyone help me in finding the best one. My areas of interest are embedded systems, bionics, wireless communication. I wish to do any project that has real world application with tremendous human benefits. Waiting for any early reply.
Please let me know asap!
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Kevin Chen's profile photoVinay Shenoy's profile photo
2 comments
 
Thanks +Kevin Chen​
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John Shovic

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How to mount, measure and test an I2C Compass on your Raspberry Pi / Arduino Project. Positioning and isolation.
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Jerry Ellsworth

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Hoping someone can give me advice. I bought a few of these BLE chips thinking they would have breadboard holes I could solder headers to:
http://www.amazon.com/gp/product/B00O2TTUEW?psc=1&redirect=true&ref_=oh_aui_detailpage_o01_s00

Instead there are tiny, indented contact points on the side of the board that I have no idea how to deal with. The spacing is much closer than a breadboard as well.

Any suggestions? Thanks!
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Matt Smith's profile photoJerry Ellsworth's profile photo
5 comments
 
Thanks Liam. That sounds like a great trick, although I think I need more skill (or practice) to pull it off. I think I trashed my first chip in the effort. Luckily they were cheap :-)

Matt, that pic helps a lot. I'll try that with my next one.
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John Shovic

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This series of articles will discuss the use of XML on applications for the Raspberry Pi. Part One covers the format of the data structures.
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