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  1. Fish4Fun

    Arduino Mega2560 & GRBL .....

    @adam.... My guess would be the board is fine as I tried numerous Mega2560 boards purchased @ different times from different vendors.....I also strongly suspect the C source code when compiled works just fine....LoL What I *****Think***** is that there is a slight discrepancy between my compiler...
  2. Fish4Fun

    Arduino Mega2560 & GRBL .....

    ^^^^^WoW^^^^^ It turns out I DID have an UnO variant on hand....one of the DCcEle UnO clone variants.....Still can't access it via the Arduino IDE.....BUT I was able to "compile & export" the GRBL source code from the first github link (several posts ago)....And then was able to Flash it using...
  3. Fish4Fun

    Arduino Mega2560 & GRBL .....

    Adam......I just ordered: 3 x Arduino Uno R3 with the ATMega328P-PU (DIP with Socket) and ATMega16AU USB 5 x Arduino Uno R3 with the ATMEGA328P (SMD) and CH340G USB 5 x ATMega328P-PU bare chips All are from US suppliers, so should all be here next week.....If you don't see anything "glaring"...
  4. Fish4Fun

    Arduino Mega2560 & GRBL .....

    115.2k is the setting for grbl .9x, but "watching" the Tx0 line from reset through several minutes on a DSO shows no outgoing pulses @ all from the ATMEGA Board.....The Rx0 line behaves as expected when a cmd is "sent"....but there has yet to be any sign of a response on the Tx0 line...
  5. Fish4Fun

    Arduino Mega2560 & GRBL .....

    Hey Adam! Oooops.....While I **did** download the one I linked above....the one I am using came from here: https://github.com/LETARTARE/Grbl-xx_with_Arduino/tree/master And perhaps that is the part of the problem? Not sure.....At this point I am open to any and all suggestions...If you have...
  6. Fish4Fun

    Arduino Mega2560 & GRBL .....

    Hey Adam, Thanks for the Response! There is no "My Code" other than the default Arduino IDE comments and this: #include <main.h> void setup(){ main(); } void loop(){} .....I can post the various headers and C files in the libraries (would be A LOT of text), or you can simply download...
  7. Fish4Fun

    slip ring connectors

    So is there a greater purpose for these slip rings? How much current are we trying to transfer? What rpm range is this designed for? Off the top of my head I am thinking there is an easier way to achieve your goal...for instance: pouring a piece of copper/brass tubing/pipe with a high...
  8. Fish4Fun

    Arduino Mega2560 & GRBL .....

    Hey Amar Dhore! Thanks for the reply! Good advice, wish it were my problem; sadly it is not. Thanks! Fish
  9. Fish4Fun

    Arduino Mega2560 & GRBL .....

    Hey Adam! Thanks for the reply....As stated, I can flash the "blink sketch" (compiled and exported as a binary, flashed from extreme burner) and it works fine.....I can communicate with the board just fine when flashed with other firmware....I have extensive experience with AVR chips and...
  10. Fish4Fun

    Need Advice: Software to Read an IC

    Hey MrElectronicsMan, Welcome to EP! Maybe it would be best to explain your ultimate goal....a quick ebay search shows two sainsmart ethernet relay modules an 8ch and a 16ch.....how many relays do you need? It APPEARS the ethernet portion of the product simply "plugs-into" a standard 8/16...
  11. Fish4Fun

    24v stepper controlled by aruduino

    BigOne5500, I think there might be an elephant or two in the room no one has mentioned, and since you seem committed to designing/building a 24V stepper driver, I am going to go ahead talk a little about these elephants..... Starting with the smaller elephant, while P-Channel mosfets appear...
  12. Fish4Fun

    Arduino Mega2560 & GRBL .....

    I am an absolute NooB with respect to the Arduino IDE and C programming, but I have been building projects using the AVR family of uControllers since the 90's.....of course, everything I have done has been in Assembler.....What I actually "need" I could have done in an afternoon writing ASM, but...
  13. Fish4Fun

    Which Microcontrollers to get?

    Hey Pantsignal! Welcome to EP and Welcome to the wonderful world of AVRs! From my perspective there are two basic types of "embedded design".....the first case covers "one-offs" through short-run production of less than ~5k pieces....the other case covers "full-blown production" typically for...
  14. Fish4Fun

    ATMEGA2560//Atmel Doccumentation Error?

    In the Data Sheet for the ATMEGA2560 the following code example is given to initialize a UART: Assembly Code Example(1) USART_Init: ; Set baud rate sts UBRRnH, r17 sts UBRRnL, r16 ldi r16, (1<<U2Xn) sts UCRnA, r16 ; Enable receiver and transmitter ldi r16, (1<<RXENn)|(1<<TXENn) sts UCSRnB,r16...
  15. Fish4Fun

    Ultrasonic sensor working underwater?

    Hey heavans1944! That is on my list of things to "try", but I am worried that w/o being epoxy encapsulated that humidity might cause problems....I am also uncertain how the "echo" effect will play out....I actually have two cisterns that need such a device...one is ~10ft in diameter but only...
  16. Fish4Fun

    Stepper Motor Max RPM

    Hey Ian! Of course. As I mentioned I really posted here so that I could direct people to it w/o having to re-write it/C&P it...making it a resource just makes it easier to find ;-) Thanks! Fish
  17. Fish4Fun

    Ultrasonic sensor working underwater?

    I ordered one of those linked ebay "waterproof" transducers.....hoping to use it underwater....but when it arrived it is as stated above....more "weather resistant" than "waterproof" and certainly not instilling a lot of confidence it will work "underwater"....that being said, I want to use mine...
  18. Fish4Fun

    Raspberry Pi to linear actuator circuit

    Hey supermitchell2! Welcome to EP! It looks to me like you are using a mosfet to control the coil of a relay and are using another mosfet to control the supply to one side of the same relay contacts (and if your schematic is correct you are attempting to use an N-Channel Mosfet to control the...
  19. Fish4Fun

    Stepper Motor Max RPM

    Thanks Harald! (Selfishly) That is why I posted it here....so I could just send people links to it w/o having to re-write it every time it comes up ;-) I am, of course, ever hopeful that others might contribute to it, but even if they don't it pretty much covers the most common recurring...
  20. Fish4Fun

    Convert PWM output to variable frequency

    Hey Cirkit! Use the Digikey link to get the data sheet for the VFC320CP....it is a very straightforward chip to use....and it does exactly what you would think it does...converts a voltage to a frequency (or a Frequency to a Voltage)...RPM in a Stepper motor driven by a stepper driver is...
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