JAQ's Blog - Electronics, Microcontrollers, DEC Minicomputers, Raspberry Pi, Airplanes and other stuff....

1. GPS Connection to Hans Summers Ultimate 3 QRSS Kit
(JAQ/BLOG)

A few years back I built a QRSS transmitter (for slow morse and WSPR) based on a recycled DLink DSL-502T router running OpenWRT and connected to an Si570 DDS module. (http://www.quicktrip.co.nz/jaqblog/home/44-si570qrss) ...

2. SI570 QRSS Beacon
(JAQ/BLOG)

My MEPT QRSS and WSPR beacon is controlled by a DLink DSL-502T running OpenWRT. The QRSS and WSPR messages are generated by directly controlling the frequency of an Si570 chip.  The interface ...

3. Building simh for OpenWRT
(JAQ/BLOG)

... to add some blinking lights?   Part One... Building simh for OpenWRT This turned out to be surprisingly easy if you have an OpenWRT build environment.  The steps are: 1. Download ...

4. Keeping only the last downloaded podcast....
(JAQ/BLOG)

My linux server uses podget to download podcasts.  The downloaded podcasts are picked up using rsync by my Asus WL-520GU / OpenWRT based car audio player. The Asus WL-520GU uses an 8GB USB stick for storage ...

5. Who is using the water?... the bore monitor speaks
(JAQ/BLOG)

... For 2 years this worked well and then the Packet Wacker died. Around this time i had been playing with DLink DSL-502T ADSL models and reflashing them with OpenWRT to provide Amateur Radio IGate services.  ...

6. Building a DLink DSL-502T Based IGate - TNC Schematic and Firmware
(JAQ/BLOG)

As mentioned elsewhere the TNC we use in the Igates is based on the ATMega8 based TNC design from Henry Carl Ott (N2RVQ). For those interested in constructing their own here is the schematic  ...

7. DSL-502T IGate Front Panel LEDs
(JAQ/BLOG)

There are 5 LED's on the front of the DSL-502T.       Not much to say about the Power LED.  If the power is connected it should be lit.   ...

8. Programming the DSL-502T IGate using “Damn Small Linux”
(JAQ/BLOG)

Items you need to get started:   1.  The “Damn Small Linux” ISO from http://distro.ibiblio.org/pub/linux/distributions/damnsmall/current/current.iso burn to a CD (approx ...

9. Building a DLink DSL-502T Based IGate - The TNC
(JAQ/BLOG)

In addition to configuring the DLink DSL-502T routers for the IGate project we also needed a TNC to connect between the radio and the serial port. Our TNC selection was based on the following criteria: ...

10. Building OpenWRT for DSL502T Appliances - Removing Modules
(JAQ/BLOG)

When building OpenWRT Kamikaze 8.09.2 for the DSL502T there are a number of mobiles included by default that are important if you are using the device as a modem but unnecessary if you plan to use the ...

11. Ubuntu 8.1 - Network Configuration Change Script
(JAQ/BLOG)

Ubuntu 8.1 works really well as a build environment for OpenWRT and programming environment for the DSL502T.  I have found that to make OpenWRT a network connection with Internet access is required but ...

12. DSL502T + Ruby + Webrick + YAML = DIY Monitoring Appliance
(JAQ/BLOG)

... the OpenWRT firmware.   Included in the OpenWRT packages is Ruby and I know I could easily write a ruby program with a web interface (using Webrick) and simple data storage (using YAML) so replace ...

13. Building a DLink DSL-502T Based IGate
(JAQ/BLOG)

... AR7 MIPS based More complete hardware details are on the OpenWRT DSL-502T hardware page. In it's IGate implement we don't use the ADSL modem or the USB-B port.  What the specification ...