I have been trying to program cheap Chinese DDS modules recently. I wanted to add a DDS VFO to one of my bitx rigs. These modules are available at $4.5 from aliexpress. They claim that it can work up to 40Mhz. I used an arduino Uno along with a rotary encoder for controlling the module. The… Continue reading Plug and Play DDS VFO with arduino
I was away from home for a week and returned back yesterday evening. As I had a weeks emails pending, the first thing I did after reaching home was to access gmail. To my horror, google was telling me that I am providing a wrong password. Then, I tried to log in to my blog.… Continue reading Hacked by Bader2010
The Bitx completed My bitx project has been lying dormant for a couple of months now. I completed wiring about 2 months back. The transmitter was working properly. But the receiver was not receiving anything . When I tried to increase volume, it started howling. After initial testing, I became QRL with lot of other… Continue reading Bitx Progressing
The 10 MHz crystal filter is one of the most important modules of bitx transceiver. Bitx uses an IF of 10 MHz. 10 MHz crystal filters are available at approximately Rs10 ( 1 US$ = Rs40 approximately) in the Indian market. I bought 10 crystals from a local electronics shop. The first thing I did… Continue reading Building Bitx part 2- The crystal filter.
A low cost PIC 16F877 prototyping board is being developed at College of engineering Attingal under my guidance. The credit for develoment goes to Shibu and Manoj. The board is intended for classroom use. The idea is to provide a low cost platform for experimenting with PIC micro controllers. The proposed board will have easily… Continue reading PIC 16F877 prototyping board – part 2