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Sentry Turrets used for building site security

Matt — Fri, 18 Mar 2016 11:13:24 GMT

These were spotted in a building site.. they seem to be protecting the digger from trespassers. I'd be interested to know what technologies are involved.

[View:/resized-image/__size/620x349/__key/communityserver-discussions-components-files/71/6153.contentimage_5F00_68305.jpg:620:349]

[View:/resized-image/__size/620x349/__key/communityserver-discussions-components-files/71/0285.contentimage_5F00_68306.jpg:620:349]

Here's some video of them too;

[View:https://www.youtube.com/watch?v=68ErtTmO2BE:440:330]

Tracking Trespassers

Former Member — Mon, 29 Feb 2016 13:35:59 GMT

Good day

Is there a service or device to pick up if there is a foreign phone on your property?

Today there is a huge problem with poachers, stock theft and crime in general in South Africa especially stock theft for my father as he is a farm owner and one of he's farms are close to a town where easily accessible for poachers to steels stock. Unfortunately tracking someones phone without consent is illegal without the proper permissions, a way around this is to create a personal device to detect if someone is on your property if they have there cellphone with them, without technically tracking them, In terms of size of property we are talking about a 1000 hectares of land.

Advice is more than welcome, thank you!

RE: Tracking Trespassers

dougw — Tue, 01 Mar 2016 06:19:27 GMT

You might be able to use a nano-cell base station or possibly even a pico-cell station to automatically detect phones within a range of about 1000 feet with appropriate antennas. Ask the manufacturer if this function is available.

RE: Hardware Encryption Module

jpmc01 — Mon, 19 Oct 2015 19:49:43 GMT

Hi Joey,

if you connect a FT232R to the Rxd (p3.0) and Txd (p3.1) pins of a 8051 you have a 8051 with USB capabilities.

I am currently using a AT89C51ED2 micro (64K Flash / 2K EEPROM) connected to a FT232R : works great.

By adding three MSOFET's an three resistors I can also use the USB port for programming the AT89C51ED2.

regards JP

Hardware Encryption Module

Former Member — Mon, 14 Sep 2015 18:36:10 GMT

Hello everyone,

I am going to Implement a AES-256 using some controller. I need suggestions for road-map and a decent choices of controllers.
Should I send complete file to controller for encryption because this implementation limits my range of file sizes.

Any help will be appreciated.
Regards

RE: Hardware Encryption Module

screamingtiger — Mon, 12 Oct 2015 12:48:32 GMT

I never used the 8051 in an embedded or micro system. It is a CISC architecture and not necessary for the AES-256 which is designed for a RISC system. So I find that requirement to be odd, but none the less.

With that said here are a list of chips:

http://www.atmel.com/products/microcontrollers/8051architecture/flash_reprogrammable.aspx

2KB of flash will suffice for your code,

http://www.atmel.com/devices/AT89C2051.aspx?tab=parameters

This chip has a UART. Personally I would look for something that is designed for USB development. I think you would want this to look like a flash drive where you plug it in and it installs the software.

RE: Hardware Encryption Module

Former Member — Sun, 11 Oct 2015 14:26:41 GMT

Hi Joey,

Our adviser is urging us to use some derivative of 8051. Do you know any of them which can be used for implementation of AES-256 as it has very low memory. In pakistan, Nothing is available. We will have to import it. Kindly guide me to select a chip or kit.

Regards

RE: Hardware Encryption Module

screamingtiger — Mon, 21 Sep 2015 12:35:38 GMT

I would just design a quick protocol or use. It can be real simple like having a start a stop sequence, send 2 blocks. One block is data, the other is a check of some sort, in worse case a checksum.

A single serial port is fine, which will be a USB port in today's terms.

I assume your country is ok with AVR just not Arduino? If so, check out AVRUSB

Another commone one is the ATTiny USB

I cant say if that is the exact one you should use but you need something that can either be a USB client OR has a usb->serial converter like the Arduino.

Keep in mind you will need software for the PC, written by you, to function as a "Driver". This software would allow you to drag and drop a file and it would take care of sending the device the data and saving the file. There may be some generic functionality you can use if you are a Windows person where it detects it as an "Encryption Device".

You can store the key in the controller but keep in mind that it can be extracted. I recommend the device prompt for a password (through the driver) and compute a key or decrypt the key stored in EEPROM. One of the issues with Symmetrical methods is key transfer as I am sure you are aware.

I don't see that you would want to implement anything too complex such as data compression etc..

Pick a device to use and I can help you from there.

RE: Hardware Encryption Module

Former Member — Mon, 21 Sep 2015 11:46:14 GMT

Hi Joey,
Thanks for response.
By hardware I mean a device which can be connected to a computer to encrypt data whatever implementation it may use.
I am considering sending data as one block from one serial port, encrypt data and receive it from the other. Should i use two different ports for sending and receiving or one will suffice?
I am doing UG project on the basis of which I may score a job. Thatswhy i dont want to use arduino because in my country Arduino is not taken seriously and thought as a easy solution. Which other will be better or should I use arduino.?
Also I want to store the Key in the Controller.
Which protocol will be better to use or should I design my own for sending and receiving data.?
Regards

RE: Hardware Encryption Module

screamingtiger — Thu, 17 Sep 2015 18:48:35 GMT

First of all, its not a "hardware implementation" if you use a MCU BTW. Its still a software implementation.

AES is simple so you can use any microcontroller.

Don't know what your experience is, but Arduino would work. Chipkit Products are good (FAST!). PSOC is good.

All can user serial communication. All can use C/C++.

I am not sure sending a complete file is wise, most MCU have small storage. I would do it more like a stream or block send. That is send it blocks of data, get back the encrypted blocks. Since AES is a block cipher this works well.

Send your key to the MCU, have it perform the key expansion, then send it a block , get a the block back. A small protocol will be needed to accomplish this but then again a protocol is always needed.

I don't know your exact details needed, a bit more information would help. Using this method you will need software running on a PC to send the file to the device, unless its a device that encrypts on the fly like a USB drive.

More info!

RE: Hardware Encryption Module

gadget.iom — Thu, 17 Sep 2015 15:13:04 GMT

Duplicate of: Hardware Encryption Device/Module

RE: DroneShield - the ultimate Raspberry Pi Project

coolxraygun — Mon, 22 Dec 2014 22:22:02 GMT

have you tried if it works and then I will do it

RE: DroneShield - the ultimate Raspberry Pi Project

Former Member — Mon, 22 Dec 2014 21:40:06 GMT

So when you detect a drone can you actually do anything to prevent it coming near

DroneShield - the ultimate Raspberry Pi Project

Former Member — Sat, 04 May 2013 00:41:35 GMT

DroneShield! Protect Your Privacy

http://droneshield.org/Home.html

DroneShield is a low-cost, easy-to-use device that detects the presence of nearby drones (including RC helicopters, quadrotors, etc) and issues alerts via email, sms, and a flashing light. The goal is to help preserve privacy from low-cost remote-control air vehicles with video cameras.

DroneShield includes a microphone that listens for sounds of drones. Each DroneShield contains a database of common drone acoustic signatures so false alarms are reduced (IE ignores lawn mowers and leaf blowers) and in many cases the type of drone is also included in the alert.

And now for the best part...they are porting it to Raspberry Pi!

I have signed up to volunteer my time to help assemble, load software, test and debug...

Does anyone else find this project as awesome as I do [View:/resized-image/__size/16x16/__key/communityserver-discussions-components-files/71/contentimage_5F00_938.png:16:16] ?

Jeff

Laptop Webcam to Network Camera or Battery Powered/Automated Video Recorder

Former Member — Fri, 21 Jun 2013 04:36:44 GMT

I stripped a webcam out of an old laptop; I do not remember what kind.

I was wondering if it would be possible to convert this webcam into a network camera or some sort of battery powered/automated video recorder.

Here are a few pictures of the webcam:

[View:/resized-image/__size/450x151/__key/communityserver-discussions-components-files/71/contentimage_5F00_24802.jpg:450:151]

[View:/resized-image/__size/450x145/__key/communityserver-discussions-components-files/71/contentimage_5F00_24803.jpg:450:145]

[View:/resized-image/__size/304x394/__key/communityserver-discussions-components-files/71/contentimage_5F00_24804.jpg:304:394]

From left to right: red, yellow and orange (twisted together), silver, and brown/redish.

security ram hc908ap64cfbe

Former Member — Tue, 25 Dec 2012 17:00:09 GMT

I have tried to download the base flash software from hc908ap64 mcu, but without success because security rom area.

I used prog08sz software and and cyclone pro programmer.

Is someone of you able to help on this problem?

I need it because I intend flashing a blank board with this base software.

Thanks in advance for help.

Have any question on Biometric Face Recognition?

atomar — Thu, 12 Nov 2009 08:56:58 GMT

Hello Guys,

If you have any questions on Biometric Face Recognition article or on biometric technology please let me know by posting you questions here.

If you haven't read the Article please have a look "Biometric Face Recognition"

Ankur Tomar

What biometric system?

awinning — Wed, 11 Nov 2009 13:08:45 GMT

Fingerprints, DNA, retina scan, bone structure, vein structure, earprints, speach patterns and other biometric methods of identification have all, or are all being developed and tested. Is there one method to rule them all?

What type of biometric test do you think will dominate, or is there enough market and applications for all to do well?