News @ Suspect Devices

Tag: AVR

  • Day 3, Thing 3, 3.3v Serial Adapter Hack

    (Archive of: http://www.thing-a-day.com/?p=3803)

    3.3v regulator added to benito.3.3v regulator added to benito.

    Will re-photograph and backfill data.

  • Benito#7 The next big thing.

    There were a few lessons that I learned at the Arduino Cult induction workshop that I put together this month. One of which was that I needed to simplify my programmer design on the cable end and not wait until I had a full blown product. Revisiting the original I first revised the ftdi boards to use a pinout compatible with the programming end of the rbba. Then I went back to the AT90USB162 based programmer modified the schematic to reduce the parts count.

    Then I made it fit into a similar profile.

    Then I put together a parts manifest at q25 and found that in spite of the increased parts count it is actually cheaper than the ftdi boards.

    Index Quantity Part Number Description Customer Reference Backorder Quantity Unit Price
    USD Extended Price
    USD
    1 50 RHM10KARCT-ND RES 10K OHM 1/8W 5% 0805 SMD 0 0.02340 $1.17
    2 25 AT90USB162-16AURCT-ND IC AVR MCU 16K FLASH 32TQFP 0 3.15000 $78.75
    3 25 631-1099-ND CRYSTAL 8.0 MHZ SERIES 0 0.48900 $12.23
    4 30 PCC220CNCT-ND CAP 22PF 50V CERM CHIP 0805 SMD 0 0.06900 $2.07
    5 200 RHM220ACT-ND RES 220 OHM 1/8W 5% 0805 SMD 0 0.02340 $4.68
    6 50 RHM22ACT-ND RES 22 OHM 1/8W 5% 0805 SMD 0 0.04080 $2.04
    7 100 399-1168-1-ND CAP .10UF 25V CERAMIC X7R 0805 0 0.02670 $2.67
    8 50 399-1284-1-ND CAP 1.0UF 16V CERAMIC X7R 0805 0 0.09500 $4.75
    9 30 475-1401-ND LED 3MM 570NM GREEN DIFF RADIAL 0 0.05600 $1.68
    10 1 AT43301-SU-ND IC USB HUB CTRLR 4PORT 24SOIC 0 1.83000 $1.83
    11 25 609-1039-ND CONN RCPT USB TYPE B R/A PCB 0 0.54200 $13.55
    Subtotal $125.42

  • Arduino Programmer

    This was started at http://www.thing-a-day.com/2008/02/04/day-4-thing-4-aduino-adaboot-programmer/My Bulky Prototype

    It is part of the way that I do programming on the avr platform and the Arduino.

    I was using the programming half of a a bulky prototype that I have been working on to program an RBBa based maze solving mouse and I looked at the pile hanging precariously off of the coffee table and thought to myself.

    “I need to just build one of these. “

    The finished product
    Modifying Sparkfun Board. to fit in the box the input side
    flea assembly blinkin lights in place
    test run Translucence done  

    So I did.

    The programmer is based on the Auto-Reset Hack and the AdaBoot bootloader. The reset is pulled by putting a capacitor on the DTR line of the serial interface which is also the bootloader interface. Most people put the cap on the Arduino but I put it on the programmer (where it belongs). This programmer was built using the ftdi ft232rl breakout board sold by sparkfun. I had to trim it down to get it to fit in the pretty blue box i bought at Tap Plastics. The chip out of the box presents two of its 4 gpio (general pourpose i/o) pins to indicate when serial is being sent and recieved. I wired a pair of very bright leds that I had to them and then tried to pipe the light to the corners using some translucent plastic tubes and hot glue. It looks pretty cool!

  • Day 21: Thing 21 — Fred 644 (an attempt to port Arduino to another processor)

    (Archive of: http://www.thing-a-day2.com/2008/02/21/day-21-thing-21-fred-644-an-attempt-to-port-arduino-to-another-processor/ )

    I wound up on the bus for much of the day so I took my laptop and ported the arduino “Core” to atmel’s Mega644 which has 4 times the memory of the new arduino as well as almost twice the number of pins avaliable. When I got to the bootloader I failed. This was a bit ambitious so I suppose I shouldnt be suprised. I will do another thing and post it here if I don’t get the bootloader working by the end of the month.