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Recent content by dpsman

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    Opto-isolation and Voltage stepdown Question

    You can also implement VVV's idea with a small DC-DC converter or even better, you can power the whole thing with the DC-DC and keep bidirectional communication with uC with only two optos and forget about thermal stability of opto devices! regards, dpsm
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    3D Component models for Protel 2004

    You can use any CAD software capable of writing/exporting IGS files, like Rhino, Solid Works, etc. Once you've imported the files you may have to correct positioning and rotation. Regards, dpsm
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    WP Groups from SD (Secure Digital) cards

    Has anybody successfully used CMD28,CMD29,CMD30 command from a SD card? I'am having trouble performing a full erase command ( I get a WP ERASE SKIP flag from status). I've tried clearing WP bits with no results, Your help will be highly appreciated!, Regards, dp
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    What is the maximum USB current?

    Re: Maximun USB current 100mA max during enumaration (config...) 500mA max after that (only if it is a external powered HUB like the ones that comes inside the PC). Regards. dps.
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    128x64 LCD module - help

    agm1264b You may check both: http://www.google.com/url?sa=t&ct=res&cd=3&url=http%3A//www.grote.net/bascom/files/convert_bitmap.pdf&ei=NTf2Qq29I8ncsAHi4u3tDQ **broken link removed** dpsm.
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    C programming pointer explanation needed

    The "trick" is done with the recursive call of reverse(); each time it is called, the line "reverse(&sPtr[1]);" performs an a increment of the pointer due recursion. Thus, when the first call to reverse() it start printing the last char and so on. Is that the type of answare you are looking...
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    Proteus for MSP430F149

    Dear FSio: He is telling you that it may be possible. I think that you want some ready made ones!. If you have the time and knowledge to do that (no offense) or the money to pay to ADT for a model (no offence meant here neither), probably you would not be asking for MSP430 libs for Proteus...
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    serial interfacing question on MCU ( clocking )

    In hardware UART the bit is usually sampled at half the bit time (depends on the implementation) About the other question, there are some algorithms to autodetect the UART speed, but I had never evaluate them. In most UARTs you can change speed with only a few instructions, so... It may not be...
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    serial interfacing question on MCU ( clocking )

    Dear hm_fa_da: When you asked about serial interface, I thought about an UART interface; in this case, the answer is yes. The RS232 standar, specifies only the "physical" layer of the interface, that is voltage levels, threshold, etc. When you connect two or more MCUs, SPI or I2C interfaces...
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    serial interfacing question on MCU ( clocking )

    The data frame (start bit + data + stop bit) is synchronized with the start bit and checked with the stop bit. That is, when the receiver jumps from "idle state" then starts to count 1/BPS times and samples each bit (normally at the middle of the time). All the bits of each frame must be...
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    Does Simulink require Matlab to run?

    Re: Simulink Simulink® 6.2.1 System Requirements: Requires MATLAB Simulink required for all Design Automation products General System Requirements for Microsoft Windows UNIX/Linux Macintosh Product Version Availability Simulink® is available on the following platforms: Operating System...
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    How to measure a DC current?

    One accurate and isolated solution: **broken link removed**
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    What kind of paper should be used for PCB printing?

    Re: PCB Printing I think I don't understand... You want to print directly on the PCB?
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    maximum voltage input for PIC16F877 ADC input..

    pic16f adc vref Max Vdd = 5.5V Max voltage in analog pins = Vdd + 0.6V (according to the analog input model)
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    What kind of paper should be used for PCB printing?

    Re: PCB Printing I've got good results with glossy papers and laser printing (OLD HP 4P like...)

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