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Raspberry Pi Forum Old model B, Samsung chip not Broadcom...
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Old model B, Samsung chip not Broadcom...

Former Member
Former Member over 10 years ago

So does it do everything the Broadcom will?

Current draw, it's running of a phone charger with no SD so nothing to do, just power and wait.

I'm looking at volumes upwards of 42,000 a year in 3 years. Mostly the dimm/microPCI looking one for cameras and only the functions I need it to have.

I have a steeper motor control board for trade, it's over designed to the hilt, the solid driver chip is under analog programming values, glue a divider circuit in, use the pot, or I²C DAC mastered by a dsPIC motor control processor, with CAN bus, ready for the car or the assembly line. Optionally fully I²C overideable, the motor control sub processor can shut down and let the pi directly run step and direction... I'm fact the I²C parameter chips I used retain their state while off, you can shut down the entire board save the steeper servo driver for basic stepping operations, I²C or just enable and step and direction, wake the nanoSleep coprocessor and it can run absolute AND relative shaft encoders...at the same time... all for under $100 INCLUDING a nice steeper and relative encoder built right onto the board, industrial grade components, 5-34v power, generates 5, 3.3, reference grade 1.5, thermometer over driver and air temp + humidity. Onboard RGB with over engineered current limitors, and driven by PIC pin so can be pwmed real nice for fade effects, bonus 3 undriven RGB outs driven by I²C io coprocessor, vIn-1.5 sinking output capable of coil loads, 2 inputs with programmable voltage, device can sink or source, raw protected PIC pins so all modules work, even analog. All voltage buses persiction voltage and in current and each motor winding selectively amped and monitored, diagnose any electrical or mechanical failure before it fails at the first blip of anonymity. Course full 16 bit DSP with modes made just for driving huge AC motors, and it can shield right on a pi, power both ways, run it off your car, even 24v hummer or any mostly DC supply you have (have good filters too so just a bridge rectifier will suffice image Crystal accuracy, or save power, RTC etc.address dip switches, 2 tiney pushbuttons and reset and leds everywhere to read status at a glance...very Rawr.

There's a ton of other tricks it will do, but this ramble should have wet your appetites to learn more, ready in about a month production intent, ALPHA prototypes in paw, weird I²C bus problem, had to put a cap ACROSS the clock and data lines...something you're never supposed to do, and in fact minimize...but on my board it fixed it, just need further firmware code to test all attributes before going to Beta. Anyone interested?

 

I really want to try the camera modules, especially the no filter one...

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  • johnbeetem
    0 johnbeetem over 10 years ago

    Jason Gerold wrote:

     

    So does it do everything the Broadcom will?

    The Samsung chip is DRAM.  It's soldered on top of the BCM2835 using "package on package" technology.  See the RasPi Hardware Wiki for more details and links: http://elinux.org/RPi_Hardware#Components

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  • Former Member
    0 Former Member over 10 years ago in reply to johnbeetem

    Nice, thank you, presently only able to view things on my phone but will dig deeper later.

    Thx again

    ^..^

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