0Posted by skullkey on January 31, 2013 at 3:06 pm
We have launched a webcast called Let’s Talk Hack!
As the name suggests it is part of the Let’s Talk Network which has their studio at House4Hack. LTN allows us to use their equipment and provides technical support – for the first show, the Let’s Talk Geek mixer stepped up and we are much obliged!
Shows is recorded and streamed live and we will notify on the mailing list the dates, but aiming for roughly once a month.
The shows will focus on a main topic and in the first one, co-host Tom presents USB reverse engineering – starting with some background on USB and then digging into the hardware and software tools available.
To watch the show (low,med,high res) or listen to a podcast, go to the show’s homepage Let’s Talk Hack
0Posted by skullkey on January 23, 2013 at 8:50 am
Introduction to Arduino Course for February 2nd is fully booked! We will have another session in March so watch this space!
For those who have booked:
The course cost is R600 and includes the Arduino UNO, cable, breadboard and everything you would need to complete this course. You can pay either on the day in cash or EFT – the banking details is on our about page: www.house4hack.co.za/about
Please bring a laptop along and install the latest version of the Arduino IDE: http://arduino.cc/en/Main/Software prior to the training. If you are struggling please email me (email@example.com)
0Posted by skullkey on December 21, 2012 at 6:53 am
This antenna is designed to give you 3dB gain over a dipole and its omni-directional for use with your SDR receiver
Its so easy to make antennas with different lengths
I used Banana sockets so you can make many antennas of different lengths for the different bands giving you gain as well as a frequency range
This antenna consists of two wires: a long one connected to the Black Banana socket
and a short one in front of that connected to the red Banana socket
The Slim Jim is a variation of the JPole antenna and my designed is the “End-Fed variation” of that.
To calculate the lengths we will give you a link below
I bought the Banana Plugs and sockets and ribbon cable at an Electroning shop the rest of the parts from Builders warehouse in prepacked “Ellies TV cables and connectors” bags
We will make the antenna
Step 1 terminate your ribbon cable with a pair of Red and Black Banana Plugs
Step 2 At a quater wavelength above the Red Banana Plug (Length C in Calculator) cut a piece of the “Red line” to make a gap (Length E in Calculator)
Step 3 make the total length of the ribbon cable from the bottom of the Black Banana plug (Length A in Calculator) and join the “Red line” to the “Black line” at the top:
Do not do this step until you have completed the housing you may need to add the length We will make the antenna housing
Step 4 Drill two holes on the top of the box one nearest to you put the Black Banana socket the other place the red Banana socket
Step 5 Drill a hole on the side of the box nearest to you and mount the Coax Female-Female Barrel connector
Step 6 Make a cable with Coax Plug on one side and to the banana sockets on the other side The inner conductor is soldered to the red banana socket
the outer shield is crimped to the black banana socket
Step 7 connect a “Ellies” cable from the coax socket to input of the SDR receiver
I have a space in the middle of the box for a wooden dowel to act a support for hanging you antennas on it
The way I have made this box, you can build other types of antennas to plug on this box
The M0UKD Slim Jim Antenna Calculator: http://www.m0ukd.com/Calculators/Slim_Jim/ (Dont worry that they short the bottom of the antenna its because they are using a tuning stub for transmitter matching and we are connecting to it as “End fed”)