Talk:Teensy++ 2.0

Teensy talk

Where to buy?

• PJRC (USA, Oregon) : http://www.pjrc.com/store/teensypp.html + http://www.pjrc.com/store/mcp1825.html
• Adafruit (USA, New York) : http://www.adafruit.com/products/731 +
• Floris.cc (Netherlands) : http://floris.cc/shop/en/teensy/86-teensy-20-usb-development-board.html + http://floris.cc/shop/en/teensy/89-mcp1825s-33-volt-voltage-regulator-for-teensy-2.html
• MindKits (New Zealand) : http://www.mindkits.co.nz/store/arduino-compatible/teensy-2-0 + ? http://www.mindkits.co.nz/store/components-ics-breakout-boards/voltage-regulator-3v3 (not SOT-223) or http://www.mindkits.co.nz/store/components-ics-breakout-boards/voltage-regulator-adjustable-lm1117-smd (not fixated: requires two external resistors for trimming it to 3.3V)
• HiTech Store (Germany) : http://www.hitechstore.de/produkt/teensypp/ + http://www.hitechstore.de/produkt/mcp1825s33/
• Boxtec (Switzerland) : http://shop.boxtec.ch/teensy-board-p-40725.html + ? http://shop.boxtec.ch/ams1117-voltage-regulator-p-40516.html ?
• Teague (as part of Teagueduino) : no stock
• Sound Art Lab (South Korea) : no stock

NANDway

• Solder 3.3V regulator on Teensy (and cut 5V pad)
• Flash the HEX to the Teensy
• Solder all control + I/O wires + Ground
• Crash it (it will beep and blink red led), press power button to have a solid red led
• Make sure to use the right nand id for nandway.py
• Dump it

Onboard Regulator alternatives

On PJRC they recommend/sell the MCP1825, a SOT223 package lowdrop regulator of 500mA with fixated 3.3V output. If for some reason you want another fixated SOT223, but with a bit more current (ofcourse maximum power is limited by the bus used for feeding, e.g. one USB 2.0 port is normally limited to 2.5W), you might consider these:

• 3.3V / 800mA
  • NX1117CE33Z
• 3.3V / 1000mA
  • ZLDO1117G33TA
  • MCP1826S-3302E/DB or MCP1826T-3302E/DC
  • AMS1117-3.3
  • NCP1117ST33T3G
  • NX1117C33Z,115
  • TS1117CW33 RP
  • TPS79633KTTR-ND
  • MIC37100-3.3WS
• 3.3V / 2000mA
  • ADP3339AKC-3.3-RL7
  • LM1117MP-3.3,V

External Powering Notes

<judges> nand powered with 3.3v by atx doesnt work
<judges> nand powered by teensy requires huge delays to work kind of reliable
<judges> teensy powered by usb, nand powered by external psu with 2v works like a charm..
<judges> thats why nandway worked for me.. it's slow. my own version is almost twice as fast and only worked on my first nand. second one always gave errors..
<judges> powered by teensy seems to be right on the edge of whats still working
<judges> but only with 10ms delays between page reads..
<judges> current power draw is 1.13amps at 2v
<judges> nand control lines are pulled high by starship and teensy isnt able to pull them low
<judges> 2v-2.5v works fine
<judges> stops working at 2.8v

<judges> it seems to be kind of variable.. <@eussNL> 1.5Amps at 2.5V is more than enough, right judges ?
<judges> using my version of nandway you'll need [email protected]
<judges> using the original one you'll need [email protected]
<judges> my version drives i/o lines differently
<judges> also original doesnt even work at 2.5V
<judges> 1.7V still works fine for both versions and only takes max 1.2A
<judges> as i said, original version doesnt work at 2.5v
<judges> 2.2v max

1.65V / 1.8V / 2.5V - 1.5A regulators

• http://www.ti.com/lit/ds/symlink/lm1086.pdf
• http://www.ti.com/lit/ds/symlink/tps75325.pdf
• http://cds.linear.com/docs/en/datasheet/3015fb.pdf
• http://www.onsemi.com/pub_link/Collateral/NCP59150-D.PDF
• http://docs-europe.electrocomponents.com/webdocs/0f82/0900766b80f82671.pdf

to wikify

http://www.ps3hax.net/showpost.php?p=573027&postcount=820

http://www.ps3hax.net/showpost.php?p=576130&postcount=843