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  • DPScope - Build Your Own USB/PC-Based Oscilloscope

    I stopped producing and selling the kits and assembled scopes. For bulk orders (e.g. classroom projects) for the DPScope and the DPScope SE, qty 50 or larger, I can supply the pre-programmed microcontrollers and printed circuit boards on special order. You would need to procure the other components yourself (I can provide a detailed bill of materials to make this easier). Please contact me through my support email and we can work out the details:Email: mailto:dpscope.contact@gmail.com (dpscope.contact@gmail.com)

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  • womai commented on david-beit-ezra's forum topic DPScope software

    Hello,I recently moved the DPScope website to a new host. You can download the most recent software for the scope from here:http://dpscope.freevar.com/downloads.htmlIt definitely can work under Windows 10 - I have it installed on several Windows 10 machines myself. Just make sure you download the software for the correct scope - DPScope, DPScope II, and DPScope SE are - despite similar names - completely different designs and their respective PC software is not compatible to a different model. The front panel (where the LED and the probe connectors are) tells you which model it is. The link above is for the "classic" DPScope shown in the picture David posted below.

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  • LCS-1M - a Full-Featured, Low-Cost Hobby Oscilloscope

    I moved my website to a different host. This project is not there yet but I plan to put it there as well as soon as time allows. Also the contact email changed:Webpage: http://dpscope.freevar.comEmail: mailto:dpscope.contact@gmail.com (dpscope.contact@gmail.com)

    I moved my website to a different host. This project is not there yet but I plan to put it there as well as soon as time allows. Also the contact email changed:Webpage: http://dpscope.freevar.comEmail: mailto:dpscope.contact@gmail.com (dpscope.contact@gmail.com)

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  • DPScope SE - the Simplest Real Oscilloscope/logic Analyzer on the Planet

    I moved my website to a different host. Also the contact email changed:Webpage: http://dpscope.freevar.comEmail: mailto:dpscope.contact@gmail.com (dpscope.contact@gmail.com)

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  • DPScope - Build Your Own USB/PC-Based Oscilloscope

    I moved my website to a different host. Also the contact email changed:Webpage: http://dpscope.freevar.comEmail: mailto:dpscope.contact@gmail.com (dpscope.contact@gmail.com)

    I moved my website to a different host. Also the contact email changed:Webpage: http://dpscope.freevar.comEmail: mailto:dpscope.contact@gmail.com (dpscope.contact@gmail.com)

    I moved my website to a different host. Also the contact email changed:Webpage: http://dpscope.freevar.comEmail: mailto:dpscope.contact@gmail.com (dpscope.contact@gmail.com)

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  • LCS-1M - a Full-Featured, Low-Cost Hobby Oscilloscope

    Hello, yes I took down the site a while ago. I plan to make it accessible again in the future (on some free hosting service), but migrating all the pages will take some time.

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  • DPScope - Build Your Own USB/PC-Based Oscilloscope

    Hello Jeff,indeed I took the webpage offline for good a short while ago - life has moved on and I no longer have enough time or interest to really support it. However I want to make this project open source when I find a few free hours, so stay tuned.Best regards,Wolfgang

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  • DPScope - Build Your Own USB/PC-Based Oscilloscope

    Yes, that's correct. That was a conscious decision for the sake of simplicity. The way the firmware works it would have to be a variable-bandwidth filter (adding a lot of complexity), or if using one for the full usable bandwidth then the software would have to do the necessary downsampling and filtering, to which the specific microcontroller used lacks the necessary resources (mainly memory - I pretty much use every available bit of it and then some).

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  • In principle, this is absolutely doable. But you need to be careful that not only the resistors, but also the capacitors of the attenuator have a sufficiently high voltage rating. The components I uses are rated to at least 100V which is safely above the maximum allowed input voltage of 25V. One issue is that with very high attenuation the upper capacitance becomes very small and thus susceptible to any parasitic stray capacitances. A safer bet would be to use a 1:10 or even a 1:100 scope probe and leave the input attenuator unchanged.

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  • If your requirements for waveform fidelity are moderate you could replace it with a fixed ceramic capacitor. You may have to try with a couple values to find the right one. Should be around 18pF, so you may want to get 16pF, 18pF, 20pF and 22pF. Decide by doing the calibration procedure, only replacing the fixed caps instead of trimming the trimmer capacitor. No need to solder each one in place during the tryout, pressing it into the via holes should be sufficient.

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  • Because the capacitive divider is only affecting the AC component of the signal (it has infinite resistance for DC), it does not matter to which DC potential (GND or 2.5V) it is connected to.

    Sorry but I am not familiar with Arduino programming (and the Atmel AVR microcontrollers they are based on) - I use bare Microchip PIC for my projects.

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  • I am sorry but I do not have any experience on the Arduino - my scopes use "bare" Microchip PIC and dsPIC microcontrollers, while the Arduino is based on an Atmel microcontroller, so even a completely different architecture. There is an Arduino based oscilloscope project on Instructables though, you may want to search for that one.

    I am sorry but I do not have any experience on the Arduino - my scopes use a "bare" Microchip PIC and dsPIC microcontrollers, while the Arduino is based on an Atmel microcontroller, so even a completely different architecture. There is an Arduino based oscilloscope project on Instructables though, you may want to search for that one.

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  • you need the Picaxe logicator and the Picaxe download cable (see www.picaxe.com for details).

    as far as construction soldering iron, solder, wire cutter,electric drill, screwdriver. If you mean software tools, you need the Picaxe programmin editor and the Picaxe download cable (see www.picaxe.com for details).

    as far as construction soldering iron, solder, wire cutter,electric drill, screwdriver. If you mean software tools, you need the Picaxe logicator and the Picaxe download cable (see www.picaxe.com for details).

    The schematic shows most of it. Apart from the Picaxe microcontroller (details on www.picaxe.com), all other parts are generic components which many hobbyists will find in their drawers. Same goes for the enclosure, I just took a suitable one from my stock of parts.

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  • No X-Y mode in the current version of software, and not likely that I will add this feature in the near future.

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  • First, the voltage into the buffer opamp is limited by the calmping diode to between 0V and 5V (actually, maximum one diode drop below/above thos values). The output of the buffer opamp can conly swing rail to rail, i.e. will never go beyond 0V and 5V, so the following device input (of the PGA) will never see values outside that range. The 10x gain is only true if the input to the 10x stage is small enough, larger values get clipped.

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