Hello!
I was on the hunt for a USB PIC microcontroller programmer after losing interest in the GTP-USB-Lite.
After a night long search, I found the June Bug Programmer by Blueroom Electronics. The programmer Side is a PICKit 2 Version without the EEPROM's used for On the Go Programming.
The trick to getting this programmer to work is to use a 18F2550 programmed with a .Hex file provided by Microchip. Once this is done, you can calibarate and use the programmer. Oh yes! Once the Chip is programmed, you can update it's firmware by pressing a Push-button on-board.
This makes sure you can program the latest supported PIC micro controller.
This Is a Must Have for Any Hobbyist!!!
Since The PCB is not available on the internet, I decided to ask Theo, a Young Lad who seems to have the knack, even though he is not into RF Design and Construction (yet!).
Here is the PCB and the Component Layout in PDF format.
The Hardware is supported by MPLAB and the hex file can be found in the MPLAB installation directory.
More Updates soon!
73's
Ragav
Sunday, April 13, 2008
Wednesday, December 26, 2007
Getting a VHF Rig!
Hey!
I am finally getting a VHF rig after much pushing around. The Rig ( A KYD TK-750A) is on its way from Bangalore! Here Is a Picture with all specs...covers the whole VHF spectrum!!!
I am finally getting a VHF rig after much pushing around. The Rig ( A KYD TK-750A) is on its way from Bangalore! Here Is a Picture with all specs...covers the whole VHF spectrum!!!
Thanks to VU2POP (Prathap) ,VU3KCA (Keerthy) ,VU3TLR (Sujay) ,VU3UBR(Shyam), VU3HMU (Barath....Yes he is finally Licensed) !!!!
Drop a Call on 2 meters (Main repeater is on 145.175 600 Positive Shift)
73 !
Ragav
Broadcast SDR receiver !
Hello People!
I received these plans for a Broadcast Software Defined Radio Receiver from OM Sarma In Hyderabad. It Uses a LC tuned VFO to cover 3-16 Mhz. Although this can be used to tune to Amateur radio transmissions it will be difficult to fine tune into a signal....
Use One of the following sofwares to decode the signals:
I received these plans for a Broadcast Software Defined Radio Receiver from OM Sarma In Hyderabad. It Uses a LC tuned VFO to cover 3-16 Mhz. Although this can be used to tune to Amateur radio transmissions it will be difficult to fine tune into a signal....
Use One of the following sofwares to decode the signals:
Here are the files:
Three Cheers for VU3WJM OM Rahul for the design!!!
Will be making this soon!
73's
Ragav
Monday, December 17, 2007
RX 20 and The Signal Gen Project
Tuesday, December 11, 2007
Hamfest India - 2007
Hello!
I came home a couple of days back from Guntur after attending the much awaited HamFest India '07. I really appreciate VU3 RSB OM Sharath Babu for organizing this hamfest and for also personally seeing to it that all delegates were happy throughout the visit.
The photos can be seen over here
Had a Great Eyeball with VU2POP,VU3KCA,VU2RMU,VU3URJ,VU3HDK and a lot of other Hams....Best part is I got an eyeball with ex.VU2FAX OM Farhan!!
73
ragav
I came home a couple of days back from Guntur after attending the much awaited HamFest India '07. I really appreciate VU3 RSB OM Sharath Babu for organizing this hamfest and for also personally seeing to it that all delegates were happy throughout the visit.
The photos can be seen over here
Had a Great Eyeball with VU2POP,VU3KCA,VU2RMU,VU3URJ,VU3HDK and a lot of other Hams....Best part is I got an eyeball with ex.VU2FAX OM Farhan!!
73
ragav
Saturday, October 20, 2007
RX 20 - Initial Circuit
Hello :)
I had been QRL with college and did not find time to update this blog.
I quickly opened the BITX circuit diagram and made some quick changes (removing the TX RF/IF/AF amplifers) ....
Take a Look at the circuit here . It looks much simpler now doesnt it :)
There are several optional additions to the circuit such as a Automatic Gain Control, Digital Frequency Display and also a Active/Passive AF SSB respsone filter which will be added later on
More in the next installment :))
73's
I had been QRL with college and did not find time to update this blog.
I quickly opened the BITX circuit diagram and made some quick changes (removing the TX RF/IF/AF amplifers) ....
Take a Look at the circuit here . It looks much simpler now doesnt it :)
There are several optional additions to the circuit such as a Automatic Gain Control, Digital Frequency Display and also a Active/Passive AF SSB respsone filter which will be added later on
More in the next installment :))
73's
Wednesday, October 10, 2007
RX 20 An Adaptation Of The BITX 20 :)
Hey people!
There has been a lot of buzz about the BITX transceiver over the internet. A friend of mine expressed his need to get a RX in his room as a bedside Receiver for monitoring DX and other traffic on the 14Mhz Band. Although propogation is bad on 20M we still decided to go hunting for the best Rx design with the usual criteria :
We were still not satisfied after looking at almost all designs on the internet. After a Quick convincing session me and my friend decided to make a Rx based on a exsisting TRX design and we did not go anywhere else except The BITX site.
We decided to make a few modification though. The extra amplifiers needed for Tx are to be omitted and a Xtal Controlled LO with varactor tuning is to replace the LC VFO (We know that the tuning range will be limited but it is a sacrifice we are willing to make to avoid the Coil.)
Other Inclusions are a 3 Khz Active / Passive Audio Filter for SSB reception along with a AGC with a Override Switch. An S-Meter is also a fancy option which we might just add.
The only thing troubling us (lest we forget the College QRL) is the VXO. I was planning to get a standard 4.00Mhz Crystal available in the market for usage with the clock timer chips. The trouble is to pull the Frequency of the LO upto +/- 60 Khz using a super VXO design. I was thinking if these xtals would be able to do that.
The first step in this project would be is to complete the LO along with a Buffer and feed the signal to a frequency counter to see how far these xtals could be pulled.
Rest in the next Installment :)
73's
There has been a lot of buzz about the BITX transceiver over the internet. A friend of mine expressed his need to get a RX in his room as a bedside Receiver for monitoring DX and other traffic on the 14Mhz Band. Although propogation is bad on 20M we still decided to go hunting for the best Rx design with the usual criteria :
- Should be a low cost design without compromising on performance.
- Should be a easy to construct and troubleshoot design.
- No hard to find / Exotic components.
- Should be well documented as the Rx may be used for Research at a Undergraduate Level
We were still not satisfied after looking at almost all designs on the internet. After a Quick convincing session me and my friend decided to make a Rx based on a exsisting TRX design and we did not go anywhere else except The BITX site.
We decided to make a few modification though. The extra amplifiers needed for Tx are to be omitted and a Xtal Controlled LO with varactor tuning is to replace the LC VFO (We know that the tuning range will be limited but it is a sacrifice we are willing to make to avoid the Coil.)
Other Inclusions are a 3 Khz Active / Passive Audio Filter for SSB reception along with a AGC with a Override Switch. An S-Meter is also a fancy option which we might just add.
The only thing troubling us (lest we forget the College QRL) is the VXO. I was planning to get a standard 4.00Mhz Crystal available in the market for usage with the clock timer chips. The trouble is to pull the Frequency of the LO upto +/- 60 Khz using a super VXO design. I was thinking if these xtals would be able to do that.
The first step in this project would be is to complete the LO along with a Buffer and feed the signal to a frequency counter to see how far these xtals could be pulled.
Rest in the next Installment :)
73's
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