• Enter the TVWB 27th Anniversary Prize Drawing for a chance to win a Weber Traveler Portable Gas Grill! Click here to enter!

Search results


 
  1. Peter F

    SMD Heatermeter on a RPI B+? Yes, it can be done......

    The PCB is available (from me). I will post the mouser project and the PCB design probably today or else tomorrow. The board is not setup for the RDTC board so you still have to use some jumper wires.
  2. Peter F

    SMD Heatermeter on a RPI B+? Yes, it can be done......

    The new case, Noise levels are low, lower than the noise levels of the previous PCB with the black wire mod.
  3. Peter F

    New build - LCD question

    Can you switch the green and yellow LEDs on and off, using the the webinterface? If you can then the shift register is working, if not then the there is something wrong with the shift register or with the connection between the atmel and the shift register.
  4. Peter F

    SMD Heatermeter on a RPI B+? Yes, it can be done......

    Correct! No noticeable noise anymore.
  5. Peter F

    SMD Heatermeter on a RPI B+? Yes, it can be done......

    The SMD capacitors are cheaper so that might compensate for the extra cost of the SMD inductor. I'm not designing for mass production and this is a much nicer solution. ;)
  6. Peter F

    SMD Heatermeter on a RPI B+? Yes, it can be done......

    Try to run the fan in manual mode at 20% and watch the pit temperature when you unplug the fan. When the temperature changes you have a noise issue.
  7. Peter F

    SMD Heatermeter on a RPI B+? Yes, it can be done......

    The answers are no and yes! The inductor is actually about 25ct more expensive, the case design will follow but first I want to properly test this board to avoid any -random color- wire mods. I used a 100µF capacitor in the output circuit instead of 47µF (didn't have one due to a supplier...
  8. Peter F

    SMD Heatermeter on a RPI B+? Yes, it can be done......

    Haven't given it any thought because the vias don't really bother me that much. The only vias that were giving me headaches were the vias under the atmega, and these have been eliminated in this version.
  9. Peter F

    SMD Heatermeter on a RPI B+? Yes, it can be done......

    I wasn't happy with the noise levels of the V6.0 Combi PCB so I decided to move some parts around to try to reduce the noise. One of the main sources of noise on the old PBC was the position of L1, moving the inductor closer to the fan connector helped to reduce the noise levels significantly...
  10. Peter F

    SMD Heatermeter on a RPI B+? Yes, it can be done......

    The second 10k resistor is only necessary when you build a 4 probe version. For a TC version this resistor needs to be left out , if you leave it in then it will interfere with the TC amp.
  11. Peter F

    SMD Heatermeter on a RPI B+? Yes, it can be done......

    The 9 components near the probe jacks are 3 sets of components repeating 3 times, so from top to bottom its, 10k 100K 0.1u 10k 100k 0.1u 10k 100k 0.1u Due to lack space for the text I had to do it like this. For some reason the + indication for the LED's is also missing. The long legs (+) of...
  12. Peter F

    SMD Heatermeter on a RPI B+? Yes, it can be done......

    Yes, it's a DS1054Z! Couldn't help myself, it's a complete overkill but a very nice toy!!
  13. Peter F

    SMD Heatermeter on a RPI B+? Yes, it can be done......

    I'm using the a+ snapshot from the wiki, the file date is July 10 2015. However, this could also be the date that the file was unzipped.
  14. Peter F

    SMD Heatermeter on a RPI B+? Yes, it can be done......

    Which version of Eagle are you using? The files are created in Eagle 7.2.0 , I'm not sure how compatible this is with older versions of Eagle
  15. Peter F

    SMD Heatermeter on a RPI B+? Yes, it can be done......

    Because I wasn't happy about the noise on the TC signal I decided to take some measurements to find out what the source of the noise was and to see if an easy fix was possible. All measurements were taken at 20% output at "voltage" setting with a 6.5CFM blower attached. Noise at output AD8495...
  16. Peter F

    SMD Heatermeter on a RPI B+? Yes, it can be done......

    Thanks for the compliment. There is a small noise issue when using the thermocouple (yellow icon), with a thermistor pit probe no noise at all. What I don't like about this design is that the inductor is to far away from the switching mosfet. In my opinion all connections between the two (and...
  17. Peter F

    New build - Link meter problems

    That 1.4V should be 3.3, this can mean 2 things; 1) Your MCP1700 is dead and needs to be replaced. 2) There is a short circuit somewere.
  18. Peter F

    New build - Link meter problems

    The 3.3V reg should only get a 5V input! Just to be sure, the 3.3V reg looks like this:
  19. Peter F

    Heatermeter 4.2.4 (not working) for sale (soldering issues)

    Klaus, Why order these parts from mouser, I'm sure that conrad.de can also provide you with these parts. Edit: Just checked and conrad has all parts on stock for less than €2.- shipping is €3.99 (if I read it correctly, mein Deutsch ist schrecklich).

 

Back
Top