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Recent content by fsoender

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    How to load test lithium battery

    Well I know that, heard about modification?
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    How to load test lithium battery

    OK, so I found this site: http://denishennessy.com/2012/04/08/measuring-battery-capacity-with-an-arduino/ Can I replace the resistor with the high watt I found and use this project and reduce the volt to the Arduino?
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    How to load test lithium battery

    I just want to load test for a few second
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    How to load test lithium battery

    Klaus, That sounds good. Yes, the battery can handle it, its multiples in a series-parallel pack. I can drop the voltage to about 24 V, and use this resistor I found on the net? 2.4 ohm - 400w Milwaukee 26-136 Ribwound, 1-5/8" x 8-1/2" $49.00 - - - Updated - - - Would it be better to use a...
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    How to load test lithium battery

    Hi, I was wondering if you guys have a way to load test a 29.6v / 10A lithium battery pack to 10A? Would a multimeter and a 2.96 Ohm / 296 W resistor work?
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    Need help understanding this schematic

    Thanks klaus! :)
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    Need help understanding this schematic

    Hi, Thanks, that helped! :)
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    Need help understanding this schematic

    Hi, The coil is transmitting signal, so I don't get why its used H-bridge... I know H-bridge is used in motors to run the motor one way at the time. Can you explain how it works here when its transmitting its "bits" thru the coil? Why is the TX signal sent from both side of the coil? I though...
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    Need help understanding this schematic

    I'm wonder why and what these two FET stages does in this attached schematic? Why is there two and not just one to send bits to the coil? Thanks!
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    Transfer data between coils

    Ok, thanks. Have you ever seen any schematics for similar project? The frequency have to be low, I know they are in the ELF band.
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    Transfer data between coils

    Im looking into designing a wireless data transmission using two coils. Tx coil will send a 8 bit data to the Rx coil that sends it to the PC thru USART. I want to read multiple temperature sensors thru a steel wall. I will be using a Atmega128. Transmit package: XX XXXX XX = 8 bits 2 bit...
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    Camera + Microcontroller + GUI

    All, Have anyone done this: I want to capture a picture with a camera e.g Omnivision with a Atmel Sam4, send the data thru RS232 to a PC. Then the question, have anyone seen or made a GUI with Visual Basic Express 2010 to display a captured image from a microcontroller?
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    Sending an image with RF

    Sorry about that, I mean those kits you can buy. Will those kits with that 2.4GHz antenna/electronics be enough power to be received on ground station? It would be great if that would work, if not I have to build my own. I just cant see that they are powerful enough..?
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    Sending an image with RF

    Im working on an QubeSat project, how would you boost the 2.4GHz signal from the satellite, or would it be enough power as it is?

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