JeeLabs . net

13-05-2013

23:02 JeeLabs Café Support: RE: LCD plug and interrupt

_@physikus,_
The LCD plug PCB has a position marked for a 2pin connector (JP1) that connects to GND and P5 on the ...

05-05-2013

21:35 JeeLabs Café Support: Expander Plug Question

_@mndless,_ the "MCP23008 chip":http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en021393#documentation can...

11:00 JeeLabs Café Support: Jeenode (433mhz v6) Heating Up

_@bwww,_  nice soldering, but unfortunately the RFM12B module is rotated 180º
It will probably not recover, but the ...

29-04-2013

15:40 JeeLabs Café General: RE: Getting the battery level on normal JeeNodes

_@damonb,_ that technique certainly saves some quiescent current. In the search for ever longer battery life, it does...

28-04-2013

23:22 JeeLabs Café General: RE: Strange problems with rfm12b

_@yattapl,_ the Wiki documentation was not clear about using the capacitors when in a 5v context.
Please refer to t...

26-04-2013

14:00 JeeLabs Café General: RE: Coin cell pulsed drain

_@ltj,_
Yes, it's there  - just hiding ;-) 
If you refer to the "JMv3 Schematic":http://jeelabs.net/attachments/d...

11:55 JeeLabs Café General: Coin cell pulsed drain

_@ltj,_ a *short* pulse load is fed mainly from the capacitor in parallel with the battery. Provided this is a large ...

09:48 JeeLabs Café General: RE: Yet Another Raspberry Pi /RFM12B Board

_@plutonomore,_ Neat !
A couple of comments on the RF design. If it is physically possible, the ANT connector shou...

25-04-2013

22:27 JeeLabs Café General: RE: How to brick a JNu

I'd be very interested if there is a recipe for invoking "High Voltage" Serial Programming on the JMv3 - this was a +...

20:33 JeeLabs Café General: RE: Calibrating RFM12B crystal

Buried rather deeply in "this presentation":http://jeelabs.net/attachments/download/1160/RFM12B_Tuneup.pdf (P.15, .pd...