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Archive for the ‘hacks’ Category

DIY USB power bank from laptop battery

Tuesday, August 23rd, 2016

A DIY USB power bank made from an old laptop battery from DoItYourselfGadgets: A situation many can relate to: an empty smartphone battery and no outlet around! That's exactly why I recycled an old laptop battery into an USB power bank. This article will show you the basic powerbank circuit consisting...

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A low-voltage disconnect for 12 volt lead acid and lithium batteries

Thursday, August 11th, 2016

KA7OEI writes: The avoidance of overcharging is usually pretty easy to avoid: Just use the appropriate charging system - but overdischarge is a bit more difficult, particularly if the battery packs in question don't have a "protection board" with them. Lead acid batteries (almost) never come with any sort of...

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Posted in DIY, hacks | 2 Comments »

Hacking HAKKO 936

Friday, August 5th, 2016

Simon Ludborzs writes: For many years I lived with dodgy epoxy fix on the handle, and finally swapped it out with a cheapie from eBay. All the HAKKO bits (tip, barrel, heating element) got transfered to the plastic handle and all was good in the world. Except for the heater...

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Your laundry is done

Monday, August 1st, 2016

Xose from Tinkerman has published a new project: I often forget my wet clothing in the washer and after a day they really smell... so I thought about monitoring my washer and get a notification in my phone when the laundry is done. An ESP8266 based Sonoff by ITead, current monitoring...

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9V/1kV DC/DC converter

Wednesday, July 20th, 2016

Robert Gawron's home insect electrocution project: Currently I'm working on a device to electrocute home insects like cockroaches, progress is small because they are smarter than I thought, but that's a different story. For that project I had to find a source of sufficient high voltage and output power. Presented...

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Posted in hacks | 4 Comments »

DIY smart glasses

Friday, July 1st, 2016

Harris has been working on his DIY smart glasses: The glasses themselves are based around an STM32F051K8 microcontroller (LQFP32 for easy soldering!). All the firmware is custom written though I got the LCD driver initialization codes from the BuyDisplay examples. The firmware is written using a somewhat “co-operative scheduling” with...

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Posted in DIY, hacks | 1 Comment »

AUX in Volvo HU-XXXX radio

Friday, June 3rd, 2016

Karl Hagström wrote an article detailing how he hacked the stereo (HU-650) in his Volvo V70 (2007) and added his own AUX input: Why, why, why isn't there an AUX input on my car stereo from 2007? Yes 2007 was before the big era of smartphones, but everyone owned a couple...

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Using Tronsmart Pavo M9 for HDMI input streaming

Friday, June 3rd, 2016

Danman wrote: Thanks to a tip of my reader, I found a relatively cheap (69Eur) Android box with HDMI input and record ability. I thought that it should be possible not only to record the HDMI input but also to stream it in realtime so I ordered one for experimenting....

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Butchered USB TTL serial adaptor

Tuesday, May 17th, 2016

Turning a USB to RS232 adaptor into a USB to TTL serial adaptor by Aaron Brady: I didn’t want to wait, so I had a look around what we had on hand. We did have a spare RS232 to USB adaptor. This one speaks the full ±15V, and I briefly considered...

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Hacking a UART where there never was before

Tuesday, April 26th, 2016

Thanks to Andrew for sharing – check out the full post on their blog, MOAM Industries. As part of a prototype developed 12 months ago I was tasked with reading measurements from a blood pressure cuff [sphygmomanometer] in real time. Not surprisingly there are no consumer level devices that have...

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Posted in hacks | 1 Comment »

BeagleBone Black GPIO Benchmark

Tuesday, April 26th, 2016

Joonas Pihlajamaa from Code and Life writes, " I've previously made a GPIO benchmark of Raspberry Pi 1 and 2, and have always wanted to see how BeagleBone Black would stack against the Pis. I recently got one so the obvious thing to do was to see how fast the...

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Posted in hacks, R-Pi | 4 Comments »

Bringing a vintage telegraph into the digital age

Thursday, April 7th, 2016

Kyle Gabriel writes: I recently inherited a key on board (KOB) telegraph that my late grandfather used to practice Morse code with when he was a kid (Figure 1). A little bit of curiosity of how it would work and a little bit of displeasure from seeing it sit and...

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Behringer v-tone GMX212 Hybrid tube amplifier mod

Monday, April 4th, 2016

Davide Gironi wrote a post on his blog showing how he modified the Behringer v-tone GMX212 Hybrid tube amplifier: For this project I've used 12AX7 vacuum tube. This tube is one of the most used for the guitar preamplification. So there are many resources available on web. The first problem i...

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Hacking DTM0660L based multimeters

Saturday, March 26th, 2016

Kerry Wong writes: In my previous post, I did a review of the 6000 counts ennoLogic eM860T true RMS multimeter. This meter is based on a signal chip design using the versatile DTM0660L DMM chip. Besides the ennoLogic eM860T, several other multimeters such as UNI-T 139C, Velleman DV4100, Tekpower TP40...

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Ultimate geeky desk sockets

Wednesday, March 16th, 2016

Here's a geeky desk sockets project from Luke. He writes: I wanted a few more functions than just a desk USB Hub. Looking on the net i came across this youtube video . This was the type of thing i was looking for but it had far too many functions...

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Posted in hacks | 2 Comments »

STM32 FM song transmitter using tricky crystal feedback modulation

Monday, March 14th, 2016

Vinod writes, "This is an FM transmitter directly made from STM32F407 discovery. It transmits the wav file stored in internal flash via FM at 100MHz. The modulation over here is happening by a tricky feedback from the analog output of the same mcu to the crystal oscillator there by disturbing...

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Posted in hacks | 1 Comment »

mavroOBD, an open source Arduino compatible OBD/Can-Bus module

Thursday, February 11th, 2016

Mavromatics' open source project designed to “hack” your vehicle, that is available on github: The goal of this project it to create an Arduino based OBD port module that can be used to enhance a vehicles capabilites. For example, if you want door locks to close when moving faster than...

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Posted in Arduino, DIY, hacks | 1 Comment »

MIDI to USB adapter with Teensy LC

Monday, January 18th, 2016

Joonas has written up documentation on his MIDI to USB adapter with Teensy LC: Thankfully, I had a MIDI connector and a high-speed optocoupler at hand, and with these I could implement a MIDI in rather easily. After some investigation with Arduino Uno, it seemed quite simple to receive the serial...

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Using a $2 DS3231 RTC & AT24C32 EEprom from eBay

Friday, January 15th, 2016

From the comments on our 'Using DS1307 and DS3231 real-time clock modules with Arduino' post, Edward Mallon writes: I’ve been putting the $1 DS3231 boards through their paces for quite a while now…and they have been performing well. More details at Edward Mallon's blog. Via the comments.

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Posted in hacks | 8 Comments »

Atmega16u2 virtual serial example using LUFA Library

Wednesday, January 6th, 2016

Shane of Wattnotions has published a new build, an Atmega16u2 virtual serial LUFA board: What I wanted the LUFA library to do was pretty specific – the atmega16u2 should show up as a virtual serial port so that the computer can connect and read data from it like any other serial...

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Posted in hacks, library, PCBs | No Comments »

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Recent Comments

  • Joshua: Will be put to good use
  • Brett: free
  • ALeggeUp: First try
  • DrObscure: Me three..
  • IWAN NAWI: PCB Sunday, right here on the blog . http://dangerousprototypes.com/blog/2016/08/28/free-pcb-sunday-pick-your-pcb-264/