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    Common electronics formula's

    Hi,

    I'm interested in finding out what common formula's people use on a regular basis, eiether electronic or electrical.

    The common ones are Ohms Law(v=IR), Watts Law (P=IV - don't know if it...
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    Re: 7 segment displays

    No you don't need a 555 for each 4026 - you can use PULSOUT in a FOR-NEXT loop to increment each digit the specified number of times.

    If you pulsed between 1 - 10 pulses (10 is for the 0) you...
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    Re: Is the serial backpack from Sparkfun....

    The BS2 LCD commands are not compatible, but it isn't difficult to control a SparkFun Serial LCD backpack from a BS2 - I've done it lots of times and have demo code if required.
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    Re: 7 segment displays

    Another option (although involving much wiring) would be to use a 7 segment display driver such as a CMOS 4026 IC. http://www.kpsec.freeuk.com/components/cmos.htm#4026

    However you would require...
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    Parallax Card Reader Woes

    Hi all,

    I'm using a slightly modified version of the demo code that came with the ISCSC4442 (256 byte) card. The only thing I've really added is the ability to read the card and see ASCII values...
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    Thanks for the idea but I use a mac, so as that...

    Thanks for the idea but I use a mac, so as that uses a Windows app it's out for me. The Sparkfun DIY oscilloscope is good and I was about to buy one, but really I need a storage oscilloscope and...
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    Ahhhh! I was getting the unit m in ms confused...

    Ahhhh! I was getting the unit m in ms confused with the M in MHz. So, with this unit I can measure anything from 1Hz to 500Khz, i.e. anything between 1s and 500,000th of a second?
    ...
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    Oscilloscope question

    Hi guys,

    I don't know if this is necessarily the right forum for this question, but I'm customizing a Boe-Bot (like everyone else) to get myself started and was looking at an affordable...
  9. Ahhh now it makes sense, I haven't come across a...

    Ahhh now it makes sense, I haven't come across a regulator with an enable/shutdown pin like that before.

    Thanks for the ideas, now to find somewhere that will sell them in the UK!
    ...
  10. Thanks Mike, sounds like a plan! Just to sum...

    Thanks Mike, sounds like a plan!

    Just to sum up - the Stamp pin would provide a 5v output to the 3.3v regulator which then obviously drops this to 3.3v (within module tolerance) which would then...
  11. Best way to control 3v laser module using 5v stamp?

    Hi,

    I have a laser module rated at 3.1v (+-10%) that I want to be able to turn on from a Stamp. I know that there are several methods I can use like having a 3.3v rail and using a transistor, or...
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    Just so you know, this is your competition: ...

    Just so you know, this is your competition:

    www.frontpanelexpress.com/

    However in order to order from them you must use their software to design your panel.

    They also sell enclosures but...
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    Ahhh, and here was me over-complicating things by...

    Ahhh, and here was me over-complicating things by thinking I had to send something else, instead of just $7C followed by $0A!

    Many Thanks,
    Morrolan

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Flying is simple....
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    SEROUT problem with Sparkfun Serial LCD?

    Hi,

    I'm having a problem using the SEROUT command with a Sparkfun serial LCD 16x2.

    The Datasheet says that in order to write a custom boot splash screen, set the display how I want it, then...
  15. I understand what you mean! What you need to...

    I understand what you mean!

    What you need to do is store the input value from DEBUGIN and then lookup SELECT...CASE statements. That will allow you to display different results on the screen...
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    Did you not receive the SumoBot manual with your...

    Did you not receive the SumoBot manual with your SumoBot?

    If you need help you can always download the Basic Stamp Syntax and Reference Manual: ...
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    Hi Mike, I think it might actually be my stamp...

    Hi Mike,

    I think it might actually be my stamp - changing the pins seems to work but I think I'm having trouble with P9 - I'll run a few tests on inputs and outputs on it, see if I can figure out...
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    Boe-Bot IR Detector issues

    Hi all,

    I'm going through 'Robotics with the Boe-Bot' currently but I'm having problems around page 241 - I am testing the IR Detector pairs but all I am receiving in the debug terminal is a 1 and...
  19. One possible solution is the use of Quantum...

    One possible solution is the use of Quantum Tunnelling Compound.

    The harder you press, you lower the resistance. If you release the pressure, resistance rises.


    It just looks like a black...
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    It all really depends on your outlook - do you...

    It all really depends on your outlook - do you just want to get your CNC mill working quickly, regardless of the process? If so, go with the windows based unit and buy a good book on VB.net.

    If...
  21. Using RCTIME to create a crude touch sensor

    Hi All,

    Today I attended a seminar held by Freescale Semiconductor aimed at ultra-low power microcontrollers (3uA for the MCU and also running/powering an LCD!) and one interesting thing I noticed...
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    One option (which does require more investment...

    One option (which does require more investment sadly) is using something like a BS2e that also has Scratchpad RAM. Whilst this can't be aliased like a normal variable, nevertheless you can use it to...
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    Why would you want to do that? The 4x20 Parallax...

    Why would you want to do that? The 4x20 Parallax serial LCD I have already has an SX28 on the board pre-programmed to act as a controller for the LCD? Is the LCD a non-parallax device? If so, what...
  24. GPS is said to be accurate upto 16 feet / 1 metre...

    GPS is said to be accurate upto 16 feet / 1 metre with the current technology, until the European Galileo system fires up which will ultimately be aiming for a resolution of 3 feet / 1 metre. I do...
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    Is this a homework assignment by any chance?...

    Is this a homework assignment by any chance? http://forums.parallax.com/images/smilies/tongue.gif

    Your problem is the fact that the basic stamp does not have interrupts, so unless you find some...
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