Hacked Gadgets Forum

April 5, 2015

Arduino Support for the ESP8266 Serial WIFI Wireless Transceiver Module

at 7:38 am. Filed under Electronic Hacks



The ESP8266 Serial WIFI Wireless Transceiver Module is popular (we have  been giving them away in some contests). It packs a lot of features in a small package for a great price. Make spoke with the creators of the Arduino Support for that device. Since there is a powerful microcontroller running the device they were able to pack in some additional code to get some work done on the side.

Make: Did you face any major architectural issues or other problems while implementing support?

Sloan: The application needs to be multitasking due to the TCP and WiFi stacks, and Arduino code is inherently blocking, so care needed to be taken to return to the multitasking ESP code as to not break it. If a user is going to code a blocking routine they need to call delay(0) or yield() to prevent the code breaking and the watchdog firing.”

March 29, 2015

Box that can be Unlocked with a Flame

at 3:24 pm. Filed under Cool Gadgets, DIY Hacks, Electronic Hacks


Alex Glover created a locked box project, some project boxes need a secret knock code to unlock, GPS positions to unlock and dice roll combinations to unlock. I think this is the first time I have seen a box that is unlocked by a flame. Nice thing is that it is not obvious that the box is opened in this way. I think it would be nice to have a certain flash pattern needed to make it hard for observers to see how to unlock it.

March 26, 2015

GSM Power Monitor and Control

at 8:10 pm. Filed under Cool Gadgets, DIY Hacks, Electronic Hacks

GSM Power Monitor and Control


If you would like to keep better track of your energy usage this GSM Power Monitor and Control by Idris Zainal Abidin might be just what you need. There isn’t much details so you would not be able to build it from the article but it should be enough for some inspiration to build your own creation.  The modular build looks great even though it would not be best suited for a compact instillation.  


March 25, 2015

Cliff Test – Constant Current Variable Load

at 10:18 pm. Filed under DIY Hacks, Electronic Hacks

Cliff Test - Constant Current Variable Load 


Check out the Cliff Test, it is a Constant Current Variable Load by TimNJ. It is based on the popular inexpensive load tester circuit that Dave Jones built a while ago. 

“Here’s some information about it:

-External AC/DC power suppply
-Fan cooled (no temperature control at the moment)
-Load switch (with LED indicator)
-10-turn pot
-Internal trimmer to set max current (currently set at 1A, but can most likely do 2-3A)
-Yellow and black banana jacks for current measurement (1A/1V)
-10x 10ohm Vishay CPF3 (3W) resistors”


Cliff Test - Constant Current Variable Load_2

March 23, 2015

Laser Oscilloscope using two Speakers

at 7:34 am. Filed under Cool Gadgets, Electronic Hacks

Laser Oscilloscope using two Speakers


Kerry Wong has built a great Laser Oscilloscope using two Speakers. Of course this is not something that can be used to measure any real voltages or waveforms with any accuracy, for that you can use any used $50 scope. What this one does is produce a great visual display. You would be able to record separate right and left audio tracks to produce any light show you like.

Via: Dangerous Prototypes

“A rod (must be made of none magnetic material) was glued onto the cone of the speaker using epoxy at an angle. So when the speaker vocal coil is energized, the vertical movement of the speaker cone translates into the vertical movement of the rod. The other end of the rod was glued onto one axis (one edge of the mirror). Another set of identical actuator mechanism was used to control the other axis. A long screw was used as the support point of the mirror. The length of the screw was chosen so that the mirror sits on the screw tip and can rotate about freely. The picture on the right above shows this configuration.”


March 22, 2015

DIY Oscilloscope using Arduino Uno and Mega

at 4:09 pm. Filed under Cool Gadgets, Electronic Hacks

DIY Oscilloscope using Arduino Uno and Mega


If you are interested in making a very basic scope to monitor some simple things before you spend the money on a real scope have a look at the work that vaupell posted in the Element 14 community. He tried a number of internet scope projects until he found this one that worked like a charm.

“After trying many different versions of code and tutorials, I was unable to get a single one to work, and all the tutorials and guides around was 2-3 years old. Not sure if it is the IDE or the actual hardware that has changed in such a way that it didn’t work anymore. I finally found a working oscilloscope from a Japanese website, (linked below) and a working TFT screen library, meaning i could read the various signals received. Clearly the limitations are 0-5v but that is fine, what i needed to know is either wave type and frequency, and this is sufficient. It also gives me an indication of the amplitude which is just a nice bonus.”


March 14, 2015

Custom DIY RFID Smart Lock

at 7:42 pm. Filed under Cool Gadgets, Electronic Hacks


RFID technology has rapidly been getting cheaper and simpler for the DIY enthusiast to get into over the years. The video above uses a Raspberry Pi and doesn’t have build instructions but that doesn’t matter much. Any microcontroller can easily connect to the heart of the access system which is the actual RFID reader. An Arduino could be used instead, it could be made stand alone instead of network connected for a simple setup. Julian Ilett picked up one of these inexpensive RFID readers, it looks very impressive for the price. 


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