Search results

Search Forums New Posts
  1. bertus

    I cant measure voltage on 100 picofarad capacitors on multimeter

    Hello, An 1X probe of an oscilloscope has an input impedance of 1 Meg Ohm, 20 times lower as the 20 Meg Ohm of the multimeter. An 10X probe of an oscilloscope has an input impedance of 10 Meg Ohm, still 2 times lower as the 20 Meg Ohm of the multimeter. Bertus
  2. bertus

    microsoft surface pro 4 repair

    Hello, There is only one in the housing you have. The others have other housing or a small x. Bertus
  3. bertus

    Need help with DC Dimming seven seg displays.

    Hello, This would be a better way to draw a CA multiplexed display: Bertus
  4. bertus

    Thermocouple Interfacing with PIC18F45K80

    Hello, Did you read the application note I posted? It has a schematic for J type themocouple and an 3004, but a 3008 could also be used. Bertus
  5. bertus

    Thermocouple Interfacing with PIC18F45K80

    Hello, Wich type of thermocouple do you have? It is likely a K or T type as those are most common. Have a look at this page for more data: http://www.lanzo.se/applications/thermocouple.html Also have a look at the attached PDF for interfacing. Bertus
  6. bertus

    Need help with DC Dimming seven seg displays.

    Hello, What kind of dispalys do you use? The schematic tells me they are CA (common Anode). Your schematic looks like you are using CC (common Cathode) displays, as your transistors are at ground level. Bertus
  7. bertus

    AD9850 Generate Random Fixed Frequencies Controlled By MEGA328P-AU

    Hello, Did you read the comment by Dick in this thread on AAC: AD9850 Generate Random Fixed Frequencies Controlled By MEGA328P-AU by DickCappels @ AAC : I sorted a similar problem on my hand-wired board by placing a resistor in series with the clock input of the AD9850; apparently there was...
  8. bertus

    Wavetek 2510A/2520

    Hello, Did you read the reply of @Harald Kapp last April: https://www.electronicspoint.com/forums/threads/wavetek-2510.292847/#post-1797356 Bertus
  9. bertus

    Comedy Thread

    Sheep discovers a trampoline:
  10. bertus

    microsoft surface pro 4 repair

    Hello, The part coded with AJX is a TLV3011. (found on this page : http://chip.tomsk.ru/chip/ChipDoc.nsf/vc1!readform&view=smd&cat=A&start=15001&count=500 ) Bertus
  11. bertus

    ardino code for Two color LED to PIC18F45K80

    Hello, When you bought the 37 in 1 kit, have a look here: https://tkkrlab.nl/wiki/Arduino_37_sensors They tested the modules on either arduino or Raspberry pi. Bertus
  12. bertus

    ardino code for Two color LED to PIC18F45K80

    Hello, Where did you buy the module? Perhaps you can buy some bi-color 3 pin led and replace it. Bertus
  13. bertus

    ardino code for Two color LED to PIC18F45K80

    Hello, Then the green is probably blown. What happens when you connect the left pin to + 5 Volts via the resistor and the right pin to ground? Bertus
  14. bertus

    ardino code for Two color LED to PIC18F45K80

    Hello, Then the right pin should light the green led. Bertus
  15. bertus

    Comedy Thread

    Some fails fro electroboom:
  16. bertus

    ardino code for Two color LED to PIC18F45K80

    Hello, I am thinking, perhaps you module uses an other kind of led and does not follow the connections of the arduino modules. Try the middle pin to ground and the left or right via a 220 Ohms resistor to the + 5 Volts. Bertus
  17. bertus

    ardino code for Two color LED to PIC18F45K80

    Hello, The arduino code is fading from red to green and from green to red and so on. The delay between each fade step is 5 mSec. The total cyclus is 2 times 256 steps of 5 mSec. So the total cyclus is about 2.5 seconds. Bertus
  18. bertus

    ardino code for Two color LED to PIC18F45K80

    Hello, That is strange. It could be the module is damaged. Wich module do you have? The KY-011 or the KY-029? https://arduinomodules.info/ky-011-two-color-led-module-3mm/ https://arduinomodules.info/ky-029-dual-color-led-module/ Bertus
  19. bertus

    AC->DC converter without a diode.

    Hello, This can happen when a capacitor gets the reversed voltage: Bertus
  20. bertus

    ardino code for Two color LED to PIC18F45K80

    Hello, Where are the leads going to? I only see the module and not the other connections. To test the module, connect the left pin to ground and the middle pin to +5 Volts. The red led should be lit. The other test is the left pin to ground and the right pin to + 5 Volts. The green led should...
Top