Hacked Gadgets Forum

September 29, 2014

Bitx20 V3 Dead Bug Style Bandpass Filter

at 11:21 pm. Filed under DIY Hacks

 Bitx20 V3 Dead Bug Style Bandpass Filter


Check out this Dead Bug Style Bandpass Filter design by PA1ED. If you want great noise isolation a metal box is ideal, check out his FR4 box design! Great idea using FR4 for the PCBs and for the case.

 “Because I don`t have a spectrum analyzer,I was not able to test it if the Bandpass filter was doing a good job on the frequency it was designed for.So I took out the earlier filter and put the new filter in my Bitx 20 V3.After I made the connections,I put the power and a antenna on the Bitx.And guess what.I didn`t hear anything,only noise.After a turn on one of the 20pf variable capacitors the stations where comming thru.I searched for a weak station and began to turn the three variable caps so that the incoming station was on his best.”

Via: Dangerous Prototypes and Soldersmoke




Bitx20 V3 Dead Bug Style Bandpass Filter_2

September 28, 2014

Name the Thing Contest – 259

at 12:33 pm. Filed under Contests



The prize this week is a Mifare RC522 RFID Card Reader. This contest will run for one week (September 28 – October 3, 2014). Ending time is based on central standard time. To enter, identify the item above and what it can be used for. Please note the image above is a side view of the thing.

Please do not give the answer in the comments.

Send an email to contest @ hackedgadgets.com with “Name the Thing Contest” as the subject, and the message body consisting of:

  • The name of the item in the above picture
  • An example of what the item pictured above can be used for

The winner will be chosen at random from all of the correct entries.


Added November 12, 2014

The item to guess was an audio crossover.

The winner is Bohdan K.  (there were 146 entries)


Below is a picture of the prize.


Mifare RC522 Card Read Antenna RF Module RFID Reader IC Card Proximity Module

Singing Halloween Pumpkins

at 12:18 pm. Filed under DIY Hacks

Singing Pumpkins


If you want to make a memorable Halloween Display have a look at these Singing Halloween Pumpkins by . A video projector is used to shine images onto the fronts of the pumpkins in such a way that it looks like they have been carved. The effect is very real looking.

“The illusion of the singing pumpkins is created by projecting animated features onto uncarved pumpkins. It is particularly effective because the only content in your projected animation are the carved features of each pumpkin. The rest of the video image is black, or no light when translated to a projection. The brightness of the projected animation reflects off of the pumpkin and appears to emanate from within, even casting a glow in front of the pumpkin as it would if it were actually carved and internally illuminated.”


September 27, 2014

Murata Cheerleaders

at 1:56 am. Filed under Complex Hacks, Cool Gadgets, Electronic Hacks, Insane Equipment



Murata is always pushing the envelope when it comes to demonstrating their technology in action. You probably remember the close up look we got of the technology behind Murata Girl and Murata Boy. This time they have made an entire group of robotic cheerleaders who dance in formation. They sit on top of a ball and balance as they are moving around. We have seen balancing ball robots before but the complexity of moving all of these balancing robots in unison must be quite challenging.

You need to see them in action. Click here to see the video, scroll down to see how the technology comes together.

Thanks to Amy from Murata for the info.



September 25, 2014

Hacked Ericsson Cell Phone and Arduino Remote Control System

at 9:17 pm. Filed under DIY Hacks, Electronic Hacks


Kostas Kokoras built a Hacked Ericsson Cell Phone and Arduino Remote Control System. Kostas broke out the Ericsson T65 cell phone serial port to allow him to connect it to the Arduino, nice of the Ericsson engineers to give us a usable serial port that is easy to access! The system looks for specific phone numbers and a certain number of rings to perform functions, this is a great idea since there would be no phone usage billing if the phone is just rung and no connection is made.


Ericsson T65 Pinouts

Name Direction Description
1 ATMS Audio to mobile
2 AFMS/RTS Audio from mobile/RTS (connected to GND in cable?)
3 CTS/ONREQ CTS/Mobile Station On REQuest (connected to GND in cable?)
4 data in Data to mobile (Rx). (Tx for K300i)
5 data out Data from mobile (Tx). (Rx for K300i)
6 ACC in Accessory control to mobile. Used as Rx in some models (i.e. T68) for flashing.
7 ACC out Accessory control from mobile/handsfree sense. Used as Tx in some models (i.e. T68) for flashing.
8 AGND Audio signal ground + 0V reference
9 flash Flash memory voltage + Service (shorted to pin 11 in service cable)
10 DGND Digital ground
11 Vcc DC + for battery charging + External accessory powering

September 24, 2014

Realtime GPS Vehicle Tracking Sends Data using GSM

at 7:19 pm. Filed under Cool Gadgets, DIY Hacks, Electronic Hacks



If you like the idea of having a GPS tracking device in your car to monitor the actual location of it there are some devices that you can simply purchase like the  SilverCloud we saw before. But if you like to build things yourself have a look at the Realtime GPS Vehicle Tracking device that Sends Data using GSM by the guys over at Cooking Hacks. Not sure what this has to do with cooking but I am not one to talk…

“It will send you an SMS with the location, longitude and latitude at the moment, and it also sends GPS data to a web server with the realtime position (Google Maps). Thanks to the GPS+GPRS shield you can track your car in realtime. This shield is programmed to recognise your number and only if it is correct it will send you this data.”




September 22, 2014

Vodka Vending Machine

at 2:39 pm. Filed under Cool Gadgets


Ben Armstrong built this interesting Vodka Vending Machine.

“Designed to dispense alcoholic beverages in night clubs this project was design and built by myself and another team mate. Arduino hardware was used to program the device which include a stepper motor, an infra red sensor, two solenoid valves, an LCD screen, buttons and a coin collector.”

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