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funkathustra

Member Since: October 18, 2009

Country: United States

  • Product WRL-12820 | about 2 weeks ago

    Yay! Only 50% more expensive than from DigiKey!

  • Product LCD-08335 | about 3 months ago

    The clock signal is obviously constant, but it’d have to be synchronized by looking at the sync pulse embedded in the component video signal. You’d also have to do some math somewhere to convert the color space of the component video signal (which is YPbPr) to RGB. And you’d still have to generate the HSYNC/VSYNC signals based on the front/back porch of the display.

    That’s a lot of work to go through to end up with something that’s not going to work nearly as well as an off-the-shelf 4.3" monitor with an analog input (something you can most certainly buy off eBay).

  • Product LCD-08335 | about 3 months ago

    Total lost cause. Just buy a 4.3" LCD monitor with a composite input off eBay. This product is just a “dumb” LCD. You’ll need a controller configured specifically to drive this display with the proper front/back porch timings, pixel clock, and obviously resolution.

  • News - We Have It In Stock | about 8 months ago

    I’m sorry, but I can’t take this blog post seriously. SFE is great at lots of stuff – but stocking components isn’t one of them. Just look at microcontrollers. SFE only carries 16 different MCUs. No, I don’t mean 16 different families – I mean 16 different chips. 7 AVRs and 9 Microchip PICs. Where are my MSP430s? Where are my HC08s? 8051s? And what about ARM microcontrollers (which are cheaper/faster/better than any 8-bit MCU they carry)? No STM32s, no Freescale Kinetis, no NXP LPCs – not even Atmel ARMs.

    And look at the microcontrollers they do carry: almost all of them are ANCIENT. They’re selling old PIC16F877s and 18F2520s, for example. Who would possibly use those in new designs? Where are the LF series? Where are the newer ones, (something like the highly-useful, and very cheap PIC16LF1825)? I would expect DigiKey/Newark/Mouser to stock old MCUs for old production designs, but why does SFE bother?

    SparkFun seems to be oblivious to the heavy-duty war raging on between the 8-bit proprietary designs and the 32-bit ARMs. Microchip is rushing to keep pumping out cheaper/better/faster 8-bit MCUs (none of which SFE carries) while the Cortex-M0 is taking over the entry-level market, while 72 MHz Cortex-M3s (again, not stocked by SFE) are cheaper/better than Atmel AVRs.

    SparkFun’s stock makes me feel like I’m living in 1998.

    Please stop bragging about your component stock, and instead, brag about stuff you’re actually good at – like your awesome community and open-source development boards.

  • News - 3D Models of SparkFun Par… | about a year ago

    Three things to note:

    1) No one uses anything other than STEP / IGES for 3D EDA design. So, if you really want to set up a component repository, I’d suggest you make sure those formats are available.

    2) I guess I’m trying to figure out why you’re setting up a repository in the first place? Everyone in the industry I know uses 3D Content Central. It’s already established, has tens of thousands of parts, is free, and allows user uploads. Why reinvent the wheel?

    3) The fact that you have 50 posts discussing which arbitrary scaling to apply to components or which file formats to support (what the heck is an SKP file?) is a good sign that you’re not doing it right.

  • Product DEV-11712 | about a year ago

    I’m not sure why you don’t think you can source these processors. They’re quite common (I see them in lots of designs). Contact your favorite Chinese IC broker and I’m sure he or she can get you it.

    A google search turned this up immediately: http://www.aliexpress.com/store/product/the-cheapest-shipping-WHOLESALE-ALLWINNER-A10-IC-BGA-HD-video-processing-chip/700044_731173877.html

    You may also be interested in the TQFP version – the A13 (though it lacks some functionality the BGA version has).

  • Product DEV-11712 | about a year ago

    The only reason you’d need to source the actual processor in small quantities is for prototyping… But if you’re designing a Cortex-A8 board from scratch, just for prototyping purposes, you’re doing it wrong.

    Think about it. Rolling a custom, six-layer board with impedance-matched traces (for the DDR memory) and laser-drilled microvias for fanning out the BGA is going to be way more expensive than this board is. Why reinvent the wheel? Develop around this board, and when you get your product working, roll out the custom board for the production run.

  • Product KIT-11394 | about 2 years ago

    …Seriously, SparkFun? This looks like something someone would build for a senior design project.

    Not only does this not use a proper DDS, it doesn’t even use a DAC! It’s a low-pass filtered PWM output that’s buffered.

    You could build this with an arduino, an op-amp and a couple passives in about an hour.

    Why would anyone buy this junk when there are tons of old 2+ MHz function generators that people are practically giving away on eBay? Help cut down on junkyard waste and buy one of those.

    Since this is a “kit” of sorts (why they make kits with half the components already soldered is beyond me…), I assume many people will buy this because they like assembling PCBs (again, beyond me…). In that case, why not just get an analog function generator chip, like a $6 DIP-packaged XR2206?

    If you just need sine waves, and you want accuracy, I’d recommend SparkFun’s AD9835 breakout board. It’ll synthesize a waveform up to 25 MHz, and takes 5 register writes to get working.

  • Product LCD-08335 | about 2 years ago

    This isn’t a two-line character LCD that you can easily put a serial interface onto; it’s a 130,000 pixel 24-bit TFT with a 9 MHz pixel clock.

    And you want a controller with a serial interface?! Over a standard 9600 bps link, it would take almost 6 minutes (yes! MINUTES!) to draw a single frame on this thing.

    Sounds like you want something with a graphics library on-board. I’d consider something like this: http://www.4dsystems.com.au/prod.php?id=155

  • Product LCD-08335 | about 2 years ago

    You’d still need a CPLD/FPGA (or a fast micro) to generate the sync/clock signals for this bad boy. And you’d need some really freakin' fast ADCs!

No public wish lists :(