n27sb
N27SB
- Joined
- Jan 30, 2015
- Messages
- 779
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For those of you that have been using the egg finder, Chris has come up with an auto start fix.
I modified a unit that was already assembled. Pretty easy to do if you are careful. Note, (the sides of my board are shaved down to fit a 24mm nosecone)
You can use the following:
Steve:
Hey, Eggtimer Rocketry is a real job (too...)
OK, here's what you need to do. I'm assuming that you have NOT assembled it yet...
o Assemble per the instructions, but leave off the following parts:
o ATTINY85 processor
o .1 uF cap above ATTINY85
o Push button switch
o The GREEN LED
o The 2.2K resistor next to the GREEN LED
If you HAVE assembled it, carefully remove the ATTINY85 processor (be careful not to lift any of the pads!), the GREEN LED, and the 2.2K resistor next to the GREEN LED. The other parts can stay, they're just not doing anything anymore.
Now, with a piece of very fine wire (I recommend wire-wrap wire, 30 ga) jumper the LOWER-RIGHT pad of where the ATTINY85 processor would have been to the UPPER pad of the 2.2K resistor that's next to the (removed) GREEN LED.
That's it. Assuming all of your solder joints are good, as soon as you connect power the RF module should start blinking, approximately once per second.
Cris
I modified a unit that was already assembled. Pretty easy to do if you are careful. Note, (the sides of my board are shaved down to fit a 24mm nosecone)
You can use the following:
Steve:
Hey, Eggtimer Rocketry is a real job (too...)
OK, here's what you need to do. I'm assuming that you have NOT assembled it yet...
o Assemble per the instructions, but leave off the following parts:
o ATTINY85 processor
o .1 uF cap above ATTINY85
o Push button switch
o The GREEN LED
o The 2.2K resistor next to the GREEN LED
If you HAVE assembled it, carefully remove the ATTINY85 processor (be careful not to lift any of the pads!), the GREEN LED, and the 2.2K resistor next to the GREEN LED. The other parts can stay, they're just not doing anything anymore.
Now, with a piece of very fine wire (I recommend wire-wrap wire, 30 ga) jumper the LOWER-RIGHT pad of where the ATTINY85 processor would have been to the UPPER pad of the 2.2K resistor that's next to the (removed) GREEN LED.
That's it. Assuming all of your solder joints are good, as soon as you connect power the RF module should start blinking, approximately once per second.
Cris