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  1. HarryA1

    My robot shows an error on the left wheel

    If it works in another unit why do you think it is damaged? Perhaps the fault lies with the error sensing circuit.  A  fault that arises with vacuum cleaner power heads is that a string, etc.  gets wound around the wheel axis impeding the wheel. There are videos related to this type of problem...
  2. HarryA1

    Optical Network Terminal (ONT) Design

    For the RTL9602C see: https://www.worldwayelec.com/pro/richtek-technology-corporation/rtl9602c-va4-cg/5335833 It is also listed here: https://www.netcomponents.com/sitemap/RTL9602C-VB-CG.html The BD16A62 transformer is listed here:  https://lcsc.com/search?q=bd16a43 and here...
  3. HarryA1

    Looking for an Optical RPM module

    You can roll your own laser  tachometer  and mount it however you wish: https://www.youtube.com/watch?v=0UqHNrqmTRU
  4. HarryA1

    Program Attiny13a​​​​​​​ With Arduino

    See section [047] here: https://blog.podkalicki.com/100-projects-on-attiny13/  else you could rewrite the stepper.cpp library file for the ATtiny13A.
  5. HarryA1

    How to using LM324M amplifier circuit for AUX speaker output

     I could not find any information on the Sonico Eastern er337.  I take it that it runs off the 12 volt car battery. Also the output to the speaker is two wires so that must be mono not stereo output. You could try it and see how well it works. As the input is for a microphone it expects low...
  6. HarryA1

    How to use 74HC595 Shift Register with Arduino?

    how-to-use-the-74hc595-shift-register-with-arduino
  7. HarryA1

    Question regarding of the keil5 logic analyzer of the LPC1768 chip

    Sorry I can not help you. There is a site that discusses a similar problem "How to set up Keil Logic Analyzer to Read Specific Pin?"  Here:  https://electronics.stackexchange.com/questions/348122/how-to-set-up-keil-logic-analyzer-to-read-specific-pin Also there is some information on Youtube...
  8. HarryA1

    Arduino + Visual Basic

    You can use the serial commucations control in VB (Visual Basic) to commucate with an Arduino board. This allows one to make a more formal interface to the board. The serial comm control is found in project/component/Microsoft Comm Control 6.0 in the VB visual studio. Selecting it adds it to...
  9. HarryA1

    Can I replace MPXV7002DP transducer by MPXV7002DPT1?

    This site gives the MPXV7002DPT1 as an alternative to the MPXV7002DP see:  https://www.apogeeweb.net/circuitry/mpxv7002dp-transducer-datasheet-features-pinout.html#product-overview This one has a list of exact alternatives  also...
  10. HarryA1

    Simplest amp design possible

    The 2sc5200 is a large "High-Fidelity Audio Output Amplifier"  it would be used as the last stage in a mullti-transistor amplifier. What is the input  in to your amplifier?  Consider using an op amplifier that would give you a simple amplifier that could use a low level input and give you 5...
  11. HarryA1

    NI GPIB-USB-HS - Issues - no original - fake - HACK? - firmware replacement from orginal

    You can find information on the subject at the NI subforum: https://forums.ni.com/t5/Instrument-Control-GPIB-Serial/bd-p/140?profile.language=en The NI discussion forum starts here: https://forums.ni.com/t5/Discussion-Forums/ct-p/discussion-forums?profile.language=en
  12. HarryA1

    1N5404 SUBSTITUE

    You can use the 1N5408 in place of the 1N5404 and you can use the 1N5404 in place of the 1N5408 if the voltage is less than a peak reverse voltage of 400 volts.
  13. HarryA1

    nano verifing code

    Can you copy this code and paste it into the IDE and get it to compile? Be sure to select nano in the IDE tools->board = "Arduino Nano". This is for an ultrasonic device but for testing you do not need  the device: #define trigPin 9 #define echoPin 10 long duration; int distance; long...
  14. HarryA1

    Searching for STM32L496VGT6 and others

    Try https://search.yahoo.com/ I found all four that way!
  15. HarryA1

    Pcb dsw pro5000 poli audio

    Hello everyone, good afternoon. I am new here. And I've been researching a common defect in a polk dsw pro5000 board. Whoever has the schematic diagram or gives me the list of the following components, I'm very grateful. D4 (?) C7 (?) Diodo? D5 (?) That is a 5000 not a 500? see...
  16. HarryA1

    What can be used to increase the LM3914N voltage

    If you download the lm3914.pdf file from TI you will see directions on how to program the current. I believe it is sinking current not supplying voltage. Also there are numerous web sites on how to build an LM3914 dot/bar display driver circuit. See: https://www.ti.com/product/LM3914 For...
  17. HarryA1

    Advice Please On this amp design

    This works well in the simulator using the transistors shown:
  18. HarryA1

    Advice Please On this amp design

    Making your R1 2000 ohms from 1000 ohms improves the output with slightly  less output power. What do you expect for output power and what do you have for input voltage? Also the transistors are large current perhaps some thing smaller? The circuit you are using has a base current of about 1.8...
  19. HarryA1

    MOD-23 counter

    The circuit below is similar to what you want to do. Using a 4 input NAND gate you can connect it to the 4 outputs that represent the valve you want.  Your NAND gate output would connect to the clr line.
  20. HarryA1

    Advice Please On this amp design

    The output looks good in the simulator at 120mv(peak to peak) the current through the 8 ohm resistor is about 500ma pp which is about 1 watt. At 150mv the output is starting to clip on the bottom. This is do to the PNP Q3 having more base current than Q2. Q3 is directly connected to Q1 while Q2...
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