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James Zelazny RE: new custom PCB  

By James Zelazny, 2 weeks  ago

Transmitting payloads
  Dan, VERY nice job on the PCB ! I was hoping to someday shrink it down and looks like you already did a great job.Thank you for taking an interest in that PCB.Still hoping to hear a signal from STELLA...
Roberto Pietrafesa RE: new custom PCB  

By Roberto Pietrafesa, 2 weeks  ago

Transmitting payloads
  Thanks a lot for sharing your new layout, dear Dan! I will follow your further flights! 73 de IZ7VHF.
DL6OW new custom PCB  

By DL6OW, 2 weeks  ago

Transmitting payloads
  hi guys, i have reworked the layout from Jim, to use only one regulator and have the cpas on board. also this is a smaller version . 73 Dan
James Zelazny RE: Custom PCB  

By James Zelazny, 3 weeks  ago

Transmitting payloads
  Excellent work on the custom board by Daniel,DL6OW !   97700D37560D453E80835CCEF42DD0A6.jpg
James Zelazny RE: Custom PCB  

By James Zelazny, 1 month  ago

Transmitting payloads
  Some help in regards to programming -
James Zelazny RE: Cheap GPS  

By James Zelazny, 1 month  ago

Supplies and materials
  Contacted the seller of the above GPS modules and received a quote. Shipping is ridiculous and asking over $7.00 USD each. Best to get a real Ublox module -
James Zelazny RE: Cheap GPS  

By James Zelazny, 1 month  ago

Supplies and materials
  Another possibility ?
James Zelazny RE: Custom PCB  

By James Zelazny, 1 month  ago

Transmitting payloads
  Another note about the custom PCB - This board uses the SOT23  LDO regulators.Be sure to set your Atmega328 fuses for 3,3v operation when programming. 5v fuse =  avrdude -c usbtiny -p m328p -U efuse:w...
James Zelazny Cheap GPS  

By James Zelazny, 2 months  ago

Supplies and materials
  Ran across this GPS but still looking to find more details.Could be Ublox NEO-7 compatible? Features: low power consumption 25mA, positioning accuracy 2.5 meters. High sensitivity, antenna self inspe...
James Zelazny RE: Custom PCB  

By James Zelazny, 2 months  ago

Transmitting payloads
  Here is a very crude video showing solar cell soldering,ATMEGA328 programming,GPS soldering.Sorry for the terrible focus - NOTE - In the programming section,when you setup your U3S for modes and band...
James Zelazny RE: Old designs using AD9850/51 DDS modules and Arduino  

By James Zelazny, 2 months  ago

Transmitting payloads
  Wiring diagram and photos using ad9850 dds/Atmega328p/Ublox neo-6 GPS.   9850.zip
James Zelazny RE: Custom PCB  

By James Zelazny, 2 months  ago

Transmitting payloads
  Simple mods that should be made before you power it up to test-   Mods.rar
James Zelazny RE: Custom PCB  

By James Zelazny, 2 months  ago

Transmitting payloads
  The boards are not labeled for value placement. From my very crude notes -   R1=1K, R2=1K, R3=10K, R4=10K, R5=10K, C3=.1uf, L1=(leave open), C5=22PF, C6=22PF, C4=.1uf, C2=.1uf, C1=.1uf, X2=20mhz, X1=2...
James Zelazny RE: Custom PCB  

By James Zelazny, 2 months  ago

Transmitting payloads
  4 things about the board. Install everything but the GPS and Si5351 when programming the Atmega328 to avoid applying too much voltage to them.The Atmega with my programmer uses 5v,the GPS and Si5351 w...
James Zelazny Old days  

By James Zelazny, 2 months  ago

My launch experiences
  Here is a time when I wasted money. At the time,there were no "pico" trackers and small foil balloons would never carry such a payload.This attempt cost me 3 months of my life and spent WAY too much m...
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