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  1. Fish4Fun

    120 AC to 120 DC

    I actually have one of those treadmill motors I bought with the intention of turning into a variable speed spindle...then I bought a 2.2kW Spindle/VFD.....so just haven't got around to that project yet...lol....my thought on it was pretty straight forward....I was planning on scouring EBAY for...
  2. Fish4Fun

    Convert PWM output to variable frequency

    @Alec_t....hrmmm, let me see if I understand what you are doing....you are using D1 and C1 to turn the Schmitt trigger into an oscillator when the PWM signal is LOW....is this correct? That is going to make for a very jerky/noisy stepper! LoL. But I like the thought! I am NOT a huge fan of...
  3. Fish4Fun

    Stepper Motor Max RPM

    I dabble in CNC as a hobby. Like all physics based hobbies noobs frequently do not understand why their projects perform poorly and generally refuse to believe the answer is as simple as component matching. A constantly recurring scenario is poor stepper motor performance....Stepper motors are...
  4. Fish4Fun

    Stepper Motor Max RPM

    Fish4Fun submitted a new resource: Stepper Motor Max RPM **Theory** - Stepper Motor Max RPM **Theory** Read more about this resource...
  5. Fish4Fun

    Thoughts on LED Replacement of 8ft Tubes

    chopnhack.....really? $38/Tube? Why am I ALWAYS the last one to get the memo? .....About 7 years ago I replaced the 4ft F-Tubes in my display freezer.....4 total tubes.....I paid close to $400 for them....I was just assuming the 8ft F-Tubes would be STUPID expensive...and likely they were...7...
  6. Fish4Fun

    Running LED bulb on lower voltage?

    lablougie, Ahhhhh....Those bulbs have a "driver" built into them (at least the ones I have seen do) and might or might not operate @ 9V.....regardless, I would suggest 1 of 3 things: 1) simply buy one of those 8-cell AA battery holders....the nominal voltage will be 8 * 1.5V = 12V.....a single...
  7. Fish4Fun

    Help Wanted: Input & Guidance on integrating Arm board, Wince, touchscreen to my digital lab supply.

    WOW, I take all my Nay-Saying back....if you have booted it into windows and can interface with it then you are already WAY farther than I thought you would get....So carry on! @electronics...definitely a hobby....built my first AM transmitter from a kit back in the mid 70's....I was young...
  8. Fish4Fun

    Help Wanted: Input & Guidance on integrating Arm board, Wince, touchscreen to my digital lab supply.

    Hey Mike! Welcome to the forum! Wow, I am not even sure where to start......Oh yea....the scanner....I think you might be biting off more there than you want to chew...not saying what you want to do is not possible....but it could take weeks/months of research to work it all out....then again...
  9. Fish4Fun

    Thoughts on LED Replacement of 8ft Tubes

    I have been working on an economical way to replace ~40 8ft F-Tube lighting fixtures for the past decade or so...with each advancement in LEDs I re-figure, recalculate and procrastinate.....The most recent cycle involves the 10W chips nominally 12V / 900mA with peak efficiency ~ 10.0V ~...
  10. Fish4Fun

    Running LED bulb on lower voltage?

    labougie, Welcome to the forum! While the question is reasonable, and simple enough.....the answer is not quite as straight-forward....."traditional" bulbs (ie incandescent ) have a relatively fixed impedance comprised primarily of resistance hence the power consumption from any given bulb is...
  11. Fish4Fun

    So I missed a memo.....or three or four

    I am glad we are on the subject of high-level programming of embedded devices.....it brings to light a philosophical problem I have had for a long time with learning/using C for uControllers.....I absolutely understand the advantages of access to libraries...."Simple things" like base-10/Ascii...
  12. Fish4Fun

    I2C mesh network

    HowardB...Welcome to the Forum! The biggest problem I see with using I2C in this manner is that the vast majority of I2C devices are not "Smart" devices....more typically they are dedicated devices like temperature sensors, RTCs, EEPROMs, ADCs etc, etc...w/o a priori knowldege about what the...
  13. Fish4Fun

    Toaster oven reflow controller plans

    I think this is what you are looking for: ControLeo .... Here is an article abut the guys who designed/built it: http://makezine.com/2015/04/15/diy-open-source-reflow-oven/ Here is the kit on ebay...
  14. Fish4Fun

    Toaster oven reflow controller plans

    bigone5500......Did you try a google search for "DIY reflow oven" ? There are several different options and at least one open source Arduino project.....I don't have a link, but a friend of mine recently ordered a "kit" (pretty sure off ebay)....had all of the various components listed in the...
  15. Fish4Fun

    Arduino Uno R3 or Arduino Mega 2560?

    Spike124....I would suggest using MEGA2560s unless there is some good reason not to.....from my perspective there isn't enough cost difference to separate them and the 2560 has massive resources compared to the UNO....some might argue that the 2560 has a few "quirks" that can cause problems for...
  16. Fish4Fun

    So I missed a memo.....or three or four

    @*steve*......YEP! I missed THAT memo too.....Did more searching/reading....WOW....I feel sorta like Rip-Van-Winkle.....Ti is OBVIOUSLY feeling they missed the boat with the Arduino Explosion.....(or maybe it has just taken them this long to respond to the Intel Revolution back in the 1980's...
  17. Fish4Fun

    So I missed a memo.....or three or four

    I started playing with writing code for PCs back in the early 80's.....by the late 90's I had added AVR uControllers and a smattering of 8051 based uCs to my tool box....I still write/support some personal Apps for PCs in Visual Basic...I still write firmware for AVRs in ASM....I know I need to...
  18. Fish4Fun

    Drone flasher

    @jack....You only ordered an 8-Bit FC? You cheap old fart, LMFAO....then why didn't you just go with an Arduino?.....Though this revelation does explain the rather lack-luster radio you ordered.....you plan on simply Txing an analog video signal.....That clears up a lot of things in your...
  19. Fish4Fun

    Drone flasher

    AK, nicely done!.....Only potential problem I see is I don't know that the signal from the Receiver/Flight Controller ever actually "stops", and if it does stop if the line is held high or low....Jack will need to find this out before moving forward.....If the signal simply "defaults to a...
  20. Fish4Fun

    Drone flasher

    Jack...couple of quick notes..... #1 --> A Servo PWM typically does not go to "0" pulse width #2 --> BLDC Motors are, in-fact, 3-Phase motors from an electrical point-of-view...the distinction is that they typically use permanent magnets in place of "rotor windings".....WRT to RPM vs...
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