SparkFun Electronics Commentsurn:uuid:214d0e4e-f1b1-d287-ce26-ac5b4c9f82492024-03-28T03:40:17-06:00SparkFun ElectronicsCustomer #263069 on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzCustomer #263069urn:uuid:16c952d2-d438-6489-885b-97a0a84f9ab72012-02-07T15:05:16-07:00<p>Would it be possible to connect three 5V analog accelerometers (say the adxl193) and a 3.3V sensor stick simultaneously to my 3.3V Arduino Pro MIni? I'm planning on using a NCP1400-5V Step-Up breakout board to input 5V to my analog accelerometers. I have previously implemented this combination successfully on my Arduino Uno board, clearly I did not use the 5V Step-Up as the Arduino Uno provides a 5V output.</p>
Andrew67 on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzAndrew67urn:uuid:4cb243df-0dda-a5df-4702-ae633b5b262a2012-02-03T17:58:58-07:00<p>Can I program this board using the pins of an Arduino Uno board as explained in the 5V version? Not sure since this one is 3.3V...</p>
MikeGrusin on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzMikeGrusinurn:uuid:10051359-365f-fc64-ebe4-107ac43df2b62011-11-11T14:55:18-07:00<p>If you haven't noticed yet, A4 and A5 are on the board but "inboard" of the edge headers.</p>
MikeGrusin on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzMikeGrusinurn:uuid:8edc3d72-617f-aeca-4695-1a4b07ab902d2011-11-11T14:54:18-07:00<p>Not sure what's going on with your setup RyanW (I2C can be tricky to get working depending on what you're talking to), but I've used the Wire library on these without issues a number of times.</p>
Dogcow on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzDogcowurn:uuid:db755481-1e7a-4d60-9c61-14150321d7882011-11-11T11:23:55-07:00<p>I would also very much like to know if the Wire library works! I have just ordered this board (3v3 8MHz) and was planning to use it with an application of mine which relies on the Wire library for I2C communication.</p>
RyanW on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzRyanWurn:uuid:5d3d3b04-d80b-e59e-bf79-af7e433add002011-11-07T17:04:03-07:00<p>Has anyone been able to get the Wire library to work on this board? I looked in the code and Wire’s twi.h file use 16Mhz as a #define, and changing it to 8MHz does not work.</p>
Customer #110042 on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzCustomer #110042urn:uuid:5800a620-000d-8e3b-e2fe-9868368ce8aa2011-10-13T11:04:18-06:00<p>It's actually mic5205.</p>
RyanW on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzRyanWurn:uuid:e487332f-c725-be36-ae0c-02c893d6641a2011-09-24T17:41:55-06:00<p>In the SparkFun Eagle library, the schematic and board layout are missing 2 pins, A4 and A5. Also would it be possible for there to be e schematic and board layout that included the serial programming pins?</p>
ParaTeam on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzParaTeamurn:uuid:7200cf73-0a99-4b45-3f63-0ef9664d94142011-09-02T18:22:32-06:00<p>I am thinking to an rechargeable coin cell(3.6v) too. Should I connect it to RAW or to VCC. If I make my own board I really need the voltage regulator, or I can use the battery directly to the system? I need to work with BMP085 sensor pressure witch is working at min 1.8v and the Atmega328 is working the same too.<br>
Thank you,<br>
Razvan</p>
areadan on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzareadanurn:uuid:e29807ae-496f-36a3-b19b-38a4ee8007672011-08-15T18:51:49-06:00<p>This seems to work fine running straight off of a LiPower (3.7V-3.8V) battery. Is there any reason why this is a bad idea?</p>
Sam R. on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzSam R.urn:uuid:db22ac05-3650-df9f-fe45-8b8e46c911bb2011-08-10T19:48:07-06:00<p>It would be awesome if you guys broke out the A4 and A5 pins onto the side of the board for I2C communication. It's a total hassle using this with a breadboard if you need I2C.<br>
-Sam</p>
LittleBlinkyThing on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzLittleBlinkyThingurn:uuid:db741dd8-3411-ac1a-7315-888b3cc3e6ac2011-08-06T15:50:13-06:00<p>WAAAAAYYYY better than the Lilypad. Would choose this one every time.</p>
RobertC. on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzRobertC.urn:uuid:70241e15-0b86-724f-4a90-c8666a566a412011-08-03T08:30:52-06:00<p>In the Arduino IDE, you would use the Arduino Pro 8MHz. It's essentially the same as the Duemilinove.</p>
Dougie on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzDougieurn:uuid:85c9d387-74ca-c5a2-6885-c8149a68bc992011-08-02T17:53:29-06:00<p>Which boot loader comes on the pro mini?</p>
SomeGuy123 on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzSomeGuy123urn:uuid:60152c6e-5e94-1748-4e1c-31ccd6c1e3152011-07-10T08:19:17-06:00<p>The regulator accepts up to 12 volts.</p>
SomeGuy123 on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzSomeGuy123urn:uuid:fdf5c8ca-4ae5-e684-4f76-ec66c26ecdec2011-07-10T08:17:56-06:00<p>You should put 5v regulators on all of them and have a solder jumper to select between 5v and 3.3v. Similar to what you did with the <a href="http://www.sparkfun.com/products/9716" rel="nofollow">Ftdi Basic Breakout</a>.</p>
SomeGuy123 on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzSomeGuy123urn:uuid:876945ce-9c42-a852-b5d9-209a1825b81a2011-07-10T08:17:11-06:00<p>You don't need pulldown resisters.</p>
SomeGuy123 on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzSomeGuy123urn:uuid:e6f24551-7938-b6c4-cca8-c5e4c3c9da202011-07-10T08:09:38-06:00<p>You could probably get away with running the board one a single 3v cell.</p>
SomeGuy123 on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzSomeGuy123urn:uuid:8e6ee4fe-b56c-9719-cf58-5e9bd13435c12011-07-10T08:08:32-06:00<p>If you are running the Mcu on 3.3v, you will be able to put up to 3.8v on any pin.</p>
simmers on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzsimmersurn:uuid:996260ac-fe49-cc8f-a160-664edac5e9912011-07-10T06:13:19-06:00<p>I'd love to know this too!</p>
stilldavid on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzstilldavidurn:uuid:b3de73ba-c146-e8b6-fab4-b2008f3755d42011-06-21T18:12:50-06:00<p>The more recent builds support this board fully now. Select "Aruino Pro or Pro Mini w/Atmega328" from the boards drop-down menu.</p>
S.F.E._Rocks!!! on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzS.F.E._Rocks!!!urn:uuid:1ee843fa-4d6c-551c-8ff6-1956b5bb9bd12011-06-20T19:07:20-06:00<p>is it OK if i power this with a 9 volt battery clip, or do i hame to use a regulated 5 volt power supply? please respond.</p>
DanSF on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzDanSFurn:uuid:4e32decc-ac1b-7378-e7c9-c6a2f1eb75b12011-05-02T13:48:46-06:00<p>The pinout on the short end of the board is different in the first two photos. Can someone clarify which one is correct? Was there a pinout change at one point, or perhaps the silkscreen was wrong at one point?</p>
Customer #203622 on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzCustomer #203622urn:uuid:4e894402-e3b7-84dd-5fc0-4ef2ef3cb3602011-04-17T12:51:42-06:00<p>I received mine last week and am quite please, but I would like to comment on the awkward placement of the I2C lines. Considering the large number of these you have in stock, I won't suggest you run out and redesign the board, but please consider in the future revising the board to make these pins more easily accessible for those of us doing breadboard prototyping.</p>
MikeGrusin on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzMikeGrusinurn:uuid:8a328309-d2aa-497d-db96-7beaed7973672011-03-11T10:08:45-07:00<p>Yes, the regulator is the only difference. (This is a good reason to use sockets on your modules, you never know when you might want to swap one out.)</p>
mr.marmot on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzmr.marmoturn:uuid:91d63c39-9b91-a567-5b8f-f170b298332a2011-02-14T10:21:02-07:00<p>Is it possible to convert this board to run 5v? I have a 3.3v board that I'd like to run in a 5v application. Is the difference between the two boards the regulator?</p>
Customer #182240 on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzCustomer #182240urn:uuid:5c0fdd2d-c32c-fc92-580b-619d946723b62011-01-17T17:30:04-07:00<p>does anybody know if I need a pulldown resistor for a digiital output pin to make sure its 0v?<br>
thanks</p>
JBeale1 on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzJBeale1urn:uuid:3b60bda3-f4da-4ee9-e7e1-e7b735de5be22010-11-05T11:28:57-06:00<p>In case anyone wonders about the size, my sample is 18.25 mm x 33.32 mm x 2.60 mm. The tallest parts are two caps, then the button. If you removed the caps and the reset button, the height would be 2.03 mm (due to the CPU). The PCB itself is 0.94 mm (37 mils) thick.</p>
jayanthyk192 on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzjayanthyk192urn:uuid:b2527454-920e-de58-e7fb-3ceffeeb2d9b2010-10-09T08:35:21-06:00<p>can i get Arduino Pro Mini with the output pins soldered?</p>
Roach on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzRoachurn:uuid:578fbe8a-ff3a-e403-318e-bc9e5a40fab32010-10-02T07:03:25-06:00<p>Can someone give me a part # for the crystal being used on this board? I can only find a 16MHz version (eg: CSTCE16M0V53).</p>
Miah on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzMiahurn:uuid:5fa61273-c829-aa6d-31fc-04cc3e137b7d2010-09-29T15:59:02-06:00<p>For Arduino 0020 and later you should select 'Arduino Pro or Pro Mini (3.3V, 8 MHz) w/ ATmega328' for this board, not what it says in the description. Otherwise things like timing and serial rates will be half what you expect.</p>
Ritch on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzRitchurn:uuid:75efb982-0988-cd2d-5437-e2207b7d597a2010-03-30T16:21:37-06:00<p>I'm hoping to use this board for a host of things but as a first I wanna ditch my stupid fan controller on my PC and use this. Bi-directional comms between this and the computer using just strings (of course some interpretive coding on the computer). Can I just do a quick and dirty resistor (68ohm in diagram on this site) line into the D+ and D- from two of the I/O lines? As power regulation is built on to the board.<br>
What is your recommended comm method? HID?</p>
RomanK on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzRomanKurn:uuid:ac7836a8-6f8c-1cd5-a28f-67706705a7862010-03-18T09:47:21-06:00<p>I want to run this arduino with coin cells. Two 3V cells in row would supply 6V... So am I right that the arduino can handle this if I connect the batteries to its 3.3V input?<br>
regards,<br>
Roman<br>
PS. I know those cells wouldn't last for long but that's not necessary.</p>
searchnaive on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzsearchnaiveurn:uuid:4a82643b-9554-0194-b36d-c8c25b4862892010-03-18T09:32:38-06:00<p>I have just ordered two Arduino Pro Minis 3V modules, but if it was possible I would have bought only the ATMega168 SMD chip with bootloader and developed my own board. If you start selling the chip with bootloader only, I probably would buy a couple!</p>
IB on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzIBurn:uuid:f05a7abf-1ebc-8815-d096-ad3a040202132010-02-14T10:49:17-07:00<p>Found it in the schematic mic5202. According to the datasheet, it looks like with a 150mA load, RAW input voltage is limited to 6.23V.</p>
IB on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzIBurn:uuid:88eb1308-f395-f090-f3f0-4bf2c94f54b22010-02-13T20:00:44-07:00<p>Can someone clarify what voltage regulator was used? The implication is that it can drive up to 150mA with an input voltage up to 12V. I'm using it to drive a 75mA GPS module from the VCC pin and its is getting pretty toasty. RAW voltage is 12V, so (12V-3.3V)*150mA = 1.3W dissipation. Ouch.</p>
Attie on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzAttieurn:uuid:fbe9dc68-ba0a-0437-6eae-7f8c8861098f2010-01-11T08:29:48-07:00<p>Does anyone know if the inputs can handle 5v?<br>
The specsheet says Vcc + 0.5v.<br>
Vcc being 1.8 - 5.5.<br>
Does this mean that running Vcc at 3.3v, the inputs are tolerant of ~6v MAX? so 5v would be fine? or does this mean that the inputs can take 3.8v MAX?<br>
Thanks!</p>
syndicated on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzsyndicatedurn:uuid:c27ae2b6-2a92-7144-50e0-1be62c3c88582009-11-05T14:28:13-07:00<p>I'll throw my support in making A4-A7 available on a breadboard. It also makes things easier if you're designing boards for the Pro Mini to mate with.<br>
Also, clarification:<br>
Are there components on this board that aren't rated for 12V+? The MIC5205 datasheet and the circuit schematic both list 16V as Vmax, but this page says 12V.<br>
Thanks! :)</p>
guitardude on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzguitardudeurn:uuid:e4dabc97-484a-1dc5-6187-cd775e7282e12009-10-13T04:35:47-06:00<p>I agree, please stretch the board by two pins in order to bring out A4:A7. Also do you plan on providing the 20MHz version?</p>
Farnsworth on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzFarnsworthurn:uuid:83d0a365-14de-7499-3cc8-08ea378333df2009-09-29T13:36:37-06:00<p>I have bought several of these boards (mostly the 168 version) and they are great. However, I really hate the placement of the ADC pins A4 and A5. These 2 pins are used for I2C which I use (BlinkM, digital compass, EEPROM, etc) and it is awkward to use this on a breadboard. Also this chip supports 2 additional ADC (A6 and A7) which are not accessible. Any thought to updating this board and making all 4 of these pins available for bread board use? Also, what about the 10 MHz version that is listed in the silk screen on the board?</p>
tz on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHztzurn:uuid:04f92658-16fa-04c2-4940-70305ead9d4b2009-08-18T08:46:10-06:00<p>0017 is out and supports the board, and at the correct baud rate.</p>
Rafaguerr on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzRafaguerrurn:uuid:176209d6-6318-da15-c916-4c80f5e4cda22009-07-05T16:17:05-06:00<p>and delays runs at correct speed, not twice as long</p>
Greg Miller on DEV-09220 - Arduino Pro Mini 328 - 3.3V/8MHzGreg Millerurn:uuid:5d5c06e2-37a0-d325-25de-876ad0788b7d2009-06-17T22:40:00-06:00<p>Arduino 0016 is out now and supports this board, but the serial stuff runs at double speed (e.g., Serial.begin(9600) will actually result in 19,200).</p>