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  1. Old Steve

    Hacking a Mattel Mindflex Headset for Brainwave Control

    Old Steve submitted a new Showcase Item: Hacking a Mattel Mindflex Headset for Brainwave Control Read more about this showcase item here...
  2. Old Steve

    Make a Mind Controlled Arduino Robot Book

    Is this the comedy section of the forums? Some parts of this 'educational' book are almost comical. This battery goes from 1.3Ah to 39Ah in five sentences:- It gave me a laugh. :D:rolleyes: They follow up with, (my highlighting):-
  3. Old Steve

    LP2950 Indecision - How would you do it?

    I have a need for a <100mA low-dropout regulator with an output voltage of 3.45V to 3.5V It has to feed two modules, one with a minimum supply voltage of 3.4V, and the other with a maximum supply voltage of 3.6V. (Between a rock and a hard place.) I'll be feeding it with a minimum of 4.2V or...
  4. Old Steve

    Unusual 12V SLA Charger Circuit

    Like a dummy, I connected my SLA charger to the battery backwards last night, heard a 'crack' and smelled the magic smoke. I connected it to the battery without the mains connected yet, by the way. I pulled it apart and fixed it, (only a track was damaged), but in the process was reminded of...
  5. Old Steve

    Uploading an Arduino UNO *.hex file to the chip/board

    I learned today that the Arduino software can output a *.hex file, as well as the usual *.ino file. >"Sketch" >"Export Compiled Binary" Can the hex file be uploaded to a chip without buying a separate programmer, just using the Arduino software? If so, under >"Tools", >"Programmer", do I select...
  6. Old Steve

    Arduino UNO Serial Question

    I'm unsure of a point regarding serial comms on an Arduino UNO. My Arduino hasn't arrived yet, so I can't do any experimenting to find out the hard way. I need to receive serial raw data from one remote device, process it, then send the processed data on to another remote device, again using...
  7. Old Steve

    Arduino vs raw PIC, Atmel etc

    So, I thought I'd ask a question, for a change. Everywhere I look, I see Arduino, Arduino, Arduino. What are the advantages of Arduino vs simply using a PIC or similar chip, with the appropriate extra components? Easier to code for? Cheaper? Definitely not smaller. And are they really viable...
  8. Old Steve

    PT2272 Supplier - No data version - (3^12 address)

    Hi all, the title says it all. I'm looking for a supplier of PT2272 remote control decoder ICs in the 'no data' version, (12-bit tri-state address.) The M4, M6, L4 and L6 versions are easy to find, (6-bit/8-bit address), but not the 12-bit address version. Any help will be greatly appreciated...
  9. Old Steve

    LM393 Comparator Problem

    I'm hoping that someone can see what I've done wrong in this circuit, (attached). It looks fine to me, but I haven't done any electronic design for some years and must be getting rusty. It monitors a 9V Ni-Cd battery - the top comparator should go high when the battery voltage is 7.2V or higher...
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