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  1. OLIVE2222

    Securing component to heatsink

    Another good information: http://www.irf.com/technical-info/appnotes/an-1012.pdf
  2. OLIVE2222

    What are these 10$ Logic Analyzers on the Ebay ?

    In the meantime i have ordered the 4 channels logic analyzer here under: http://www.ikalogic.com/ikalogic-products/scanalogic-2/ 4 channels is somewhat limited to serial bus analyze but the software is very user friendly , many protocol decoding are included too and the module can replay the...
  3. OLIVE2222

    Whats this please?

    Hi Mark, you welcome to ask any question ! The component is a crystal. If you can take a picture of the crystal other side, the board other side and the germany made IC we can probably provide you more complete information's. Olivier
  4. OLIVE2222

    Soldering flux pen

    The kester 186: http://www.kester.com/download/186%20Soldering%20Flux%20Data%20Sheet.pdf
  5. OLIVE2222

    PCB Layout Help

    JD, for a test you can just cut the +3V3 track and solder a wire on C3
  6. OLIVE2222

    component identification

    702 is a "common" marking for the single 2N7002 FET. It's probably a dual version from an unknown manufacturer. You can check if the pinout it's the same as this one: http://www.fairchildsemi.com/ds/2N/2N7002DW.pdf
  7. OLIVE2222

    PCB Layout Help

    JD, To find out if the 52KHz is the root cause can you supply the board with a linear (lab) 3V3 supply or a fresh pair of AA batteries ? Olivier
  8. OLIVE2222

    PCB Layout Help

    Is the 25MHz crystal usage even possible? The Atmel ATSAMD20-XPRO board is using a 32KHz (RTC) crtystal on the concerned pins. Olivier EDIT: OK misreading on my side you are using the XOSC pins, not the XOSC32K ones, that's OK.
  9. OLIVE2222

    PCB Layout Help

    To me the problem is more located on the ATSAMD20 system clock configuration. Have looking at you gerbers and the layout looks OK. The 52Khz from you regulator should not be the root cause to me. You can have two issue: Correctly set up the ATSAMD20 for an external crystal Correctly set up the...
  10. OLIVE2222

    PCB Layout Help

    The ATSAMD20 as a quite complex clock circuitry, do you succeed to make it work on is internal 8Mhz oscillator first? Also you are using the clock generator to produce 25MHz to the enc28j60, is the clock generator able to divide by 1? I have seen a minimum of 8 but just have a quick look on the...
  11. OLIVE2222

    PCB Layout Help

    Hi JD and welcome to electronicspoint! We can have a look at your PCB layout but better to start with the schematic. Can you please post it ? Also the ENC28J60 as a clockout pin where you can measure the 25Mhz clock divided by 4 (default value). Olivier
  12. OLIVE2222

    Help please with transistors

    The transitor(s) can be board removed for check purpose (as the led) before replacement. However both transistors are popular Japanese models. 2SA2015, European equivalent is BC557, same package different pinout 2SC945,European equivalent is BC547, same package different pinout
  13. OLIVE2222

    Does anyone know what this component is????

    It's probably a common mode filter made by Epcos. Olivier
  14. OLIVE2222

    Electronic angle finder repair

    You will find here under the 6 connections to be checked. All measurements are to be done with the negative probe connected to the ground. Please report the 6 values with the arm mounted for min, middle and max angle: LMC6482 Min Mid...
  15. OLIVE2222

    Electronic angle finder repair

    Oups, Yes the angular sensor is the Tokin part and the overmolded black part between the battery holder and the Tokin is the 4MHz resonator. Except the Tokin itself they are very few parts prone to fail in this angle finder. The OP can check for a signal on the LMC6482 pin 1 and 7 and on the...
  16. OLIVE2222

    Electronic angle finder repair

    The Tokin is probably the angular position sensor, I have doubt, as Kris, about the 4 Mhz resonator option because of is bulky size. Here a link with related products: http://www.nec-tokin.com/english/product/piezodevice2/ceramicgyro.html Olivier
  17. OLIVE2222

    Boom Gate Remote - Domino DTC 4334

    The remote control use a rolling code, as seen in ebay and gibidi link. The rolling can be implemented with only one carrier frequency (the code is changed each time the button is pressed according to a proprietary rule). frequency hopping, who can be part of an encryption process, use few...
  18. OLIVE2222

    Problem with IC LM324

    Your schematic is the 4.95V case identified by Harald who can't work with a LM324. As rail-to-rail op amp you can use a cheap MCP6001 from Microchip. You must carefully chose your resistor in the divider to match the pressure range with the ADC reference. Also note that your 5V that supply the...
  19. OLIVE2222

    Boom Gate Remote - Domino DTC 4334

    Hi Jim and welcome to electronicspoint ! Your remote control is part of the gibidi range: http://www.gibidi.com/english/prodotti/accessori/Dep_ACCESSORI_Lug09_Ing_web.pdf They offer a manager tools to handle the keys and the access. They products so are probably not based on generic remote...
  20. OLIVE2222

    Wondering about the proper steps from prototyping to PCB board.

    How many iterations are needed to get a working PCB is highly depending on both the design complexity and the designer skills/experience, yep obvious. It's can be a pain when you begin, but that's the learning curve, same to become a good carpenter or anything! Having a first PCB with a bit of...
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