urn:uuid:214d0e4e-f1b1-d287-ce26-ac5b4c9f8249 2017-07-14T10:03:50-06:00 SparkFun Electronics MoighonFweeman urn:uuid:1880497d-81b2-5d18-b5bb-907f8047db9f 2015-01-10T19:16:34-07:00 <p>What is the difference between the ATtiny84 and the ATtiny2313?</p> Wedge urn:uuid:649a57c5-d77a-a207-146c-65d310570ec0 2014-06-09T23:57:25-06:00 <p>That&rsquo;s how I do it. You just need to wire up the 6 pin connector to the appropriate pins on the tiny84 using jumper wires (vcc, ground, reset, sck, mosi, miso). Works like a charm. You&rsquo;ll almost certainly need to solder a header onto the tiny avr programmer board though.</p> Customer #320989 urn:uuid:438e98cc-f25b-ccf6-d8e8-1ec5271f6d49 2014-04-19T00:25:30-06:00 <p>This should be as popular as the t85. It is not and many are misinformed.</p> Customer #320989 urn:uuid:ffe71be9-c572-53fa-5a3c-6a6121600472 2014-04-19T00:17:05-06:00 <p>it has nothing to do with 4.2k&hellip; you have to change your code to use byte or char, if it makes sense&hellip; Otherwise it won&rsquo;t work&hellip; stop copying others and do something yourself.</p> Customer #320989 urn:uuid:4c9df352-3afa-2b15-8d2e-b4c26575fe44 2014-04-19T00:12:37-06:00 <p>You are running out of RAM, which the arduino IDE is not smart enough to tell you.</p> Customer #320989 urn:uuid:8c0b974a-9e8c-63e9-11a4-b040aa06c16a 2014-04-19T00:07:37-06:00 <p>I don&rsquo;t hate sparkfun&hellip; quite the contrary&hellip; sometimes they should do their homework too.</p> Customer #320989 urn:uuid:f043b0f5-0005-4e7a-7dde-900548d21860 2014-04-19T00:04:37-06:00 <p>It is indeed the same&hellip; even the same signature. You should read datasheets so you are informed before you write.</p> Customer #532287 urn:uuid:dcc50196-a5e8-5c0d-bca6-67b2d9145561 2014-04-18T10:22:02-06:00 <p>That one is ATtiny84A not ATtiny84. First one has 0.512kB EEPROM 12 I/O Pins, second one doesn&rsquo;t.</p> Customer #320989 urn:uuid:3f1b62c4-3d73-2ba8-55d1-26541d4b3332 2014-04-07T02:39:56-06:00 <p>Look at ATtiny84A&hellip; indeed runs at 20MHz and costs half&hellip; $1.55, in quantities over 25, it is $0.99.</p> Customer #480376 urn:uuid:185cd264-c706-5852-5387-d2253fb52ef9 2014-04-06T21:35:28-06:00 <p>That&rsquo;s not true. There&rsquo;s one that mouser sells for about half this price, but that one runs at 10 MHz. This one runs at 20 MHz, which mouser also sells&hellip; for $0.13 more than sparkfun.</p> Customer #320989 urn:uuid:8da257c3-862d-956a-8d5a-77a8e7d9f04e 2014-03-08T08:30:32-07:00 <p>Why bother even carrying these?&hellip; you can buy them from mouser for half the price that you sell them&hellip; stick with what you are good at and leave this stuff to the big boys&hellip;</p> Customer #412312 urn:uuid:c7399b36-437a-7d1a-d8cb-5b3ccc62b017 2013-11-12T01:47:56-07:00 <p>I bought one of these and transferred a small project onto it that uses a few pots and some pushbuttons and everything works just as it did when I initially set it up on my Uno however i can&rsquo;t seem to load any code onto the tiny84 if it&rsquo;s over 4.2k..? I get a compile error which I don&rsquo;t have in front of me but it said something about truncating the code. If i compile the exact same code but have my Uno as the selected board in the ide, it compiles fine. If I remove a few lines of the code and have the board set to atTiny84 then it compiles fine too if it is under 4.2k. Am I missing some step that allows for bigger code to be uploaded.? It is supposed to hold up to 8k right.?</p> DidymusRex urn:uuid:9b6a43b1-d997-1598-1bf6-b0bce2278c77 2013-10-26T09:36:50-06:00 <p>I wnt to use this as a permanent processor in a circuit prototyped on an Arduino, can I use the Tiny AVR programmer (https://www.sparkfun.com/products/11460) to program the chip? the project needs more pins that I can get on the Tiny85 so this would be a great solution!</p> Kamiquasi urn:uuid:4e2dd1e2-34a5-310e-4ab5-2f9706a4f357 2013-09-30T13:58:59-06:00 <p>It will handle if statements, but depending on just how complex your sketch is the sketch may not fit inside its limited memory. <a href="http://en.wikipedia.org/wiki/Atmel_AVR_ATtiny_comparison_chart" rel="nofollow" >Wikipedia: ATtiny comparison chart</a></p> <p>If you know your requirements, you can find a suitable AVR through <a href="http://www.avrfreaks.net/?module=Freaks%20Devices&amp;func=devCompare" rel="nofollow" >AVR Freak: compare devices</a></p> Customer #422987 urn:uuid:62836109-1949-459e-61a9-b6995cb0d1e0 2013-09-30T13:35:11-06:00 <p>Will this chip handle complex sketches that contain if statements?</p> SoftwareReset urn:uuid:bb5200d7-0216-4f21-f854-f1dc3303ccd0 2013-09-04T16:29:13-06:00 <p>The internal clock runs at 8 MHz, but it comes from the factory programmed to divide this 8 MHz clock by 8 which results in the chip running at 1 MHz You can make it run at the full 8mHz speed (without using an external clock) by modifying one of the fuse values. Refer to this link: http://www.engbedded.com/fusecalc Change the value of low fuse (LFUSE) from 0x62 to 0xE2. You can do this with Avrdude and a programmer that can deal with the Attiny84, or a programmer like the AVRISP MKII with the driver and programming interface that accompanies Atmel Studio (which can be downloaded free).</p> Customer #302799 urn:uuid:a1df104f-b9ff-109b-7dac-25a996745242 2013-07-25T12:29:52-06:00 <p>These don&rsquo;t have a serial port, but do have TWI(I2C) and SPI.</p> Customer #302799 urn:uuid:b4ec0752-e634-49bc-5bb3-69f66dd3973c 2013-07-25T12:28:42-06:00 <p>Am I correct in saying that the internal clock it running at 8MHz?</p> MikeGrusin urn:uuid:0e866711-1794-696e-ca87-aca29a777876 2013-07-17T11:10:59-06:00 <p>This chip will run with either an external clock, or an internal one. This is selected when you&rsquo;re programming it. See the datasheet for more information.</p> Customer #335564 urn:uuid:afb0824e-cd35-7a08-3d80-9cc381ee822b 2013-07-15T17:25:59-06:00 <p>do i need to buy a crystal oscillator for this ship ?</p> Blue Smoke urn:uuid:d4001dff-c1d7-2109-17ea-9b6d2b450f8f 2013-06-30T12:56:35-06:00 <p>Can these read serial data, for example, from an ID-12 RFID reader?</p> Alexei2 urn:uuid:132bb78b-583f-b952-7280-1aa462732324 2013-06-22T16:52:08-06:00 <p>And that&rsquo;s the wiring for programming it with Arduino: http://www.instructables.com/id/Full-Binary-Clock/step5/Programming-the-ATtiny84/ I tried programming it with Tiny AVR Programmer https://www.sparkfun.com/products/11460 and it works great. Please remember - programming pins MOSI, MISO and SCK are not &ldquo;0&rdquo;,&ldquo;1&rdquo;,&ldquo;2&rdquo; as on AtTiny85</p> disabelle urn:uuid:7955fdd8-8e05-c41b-61ae-e977ecdbd218 2013-04-23T14:47:25-06:00 <p>Ok sweet thanks</p> Kamiquasi urn:uuid:d83d8096-bd85-54d0-12b2-6643618ecd16 2013-04-23T14:08:53-06:00 <p>25V is plenty :) For longevity when using a capacitor as an actual component, most people tend to double the system&rsquo;s voltage to get the desired specified voltage. In this case, your Arduino will probably be running at 5V, so 25V is fine. ( The capacitor is only used in this case to prevent the Arduino from auto-resetting, so it&rsquo;s not as critical, as long as it isn&rsquo;t below the system&rsquo;s voltage. )</p> disabelle urn:uuid:0e72b5d8-4117-ff95-d163-6a5ec2ce787c 2013-04-23T13:51:34-06:00 <p>so to upload code to this from my arduino through isp, I need a 10uf cap but does the voltage matter on the cap because I got a 10uf 25v and it didn&rsquo;t specify in any tutorials I found.</p> AtlWrk urn:uuid:d82f7624-85e8-e3f4-8fcd-cce8cae3e46c 2013-03-14T17:24:24-06:00 <p>20 pins –> ATtiny2313</p> Dickcheney urn:uuid:4ac528e1-974d-c9a8-fee1-dad1b9b1b484 2013-02-19T04:31:43-07:00 <p>According to the datasheet, it will work down to 2.7 volts at 8mhz, which makes this chip ideal for battery powered projects, since battery voltage goes down as the batteries die. Yet, it will also work fine at 5 volts (mine is running off of that and it hasn&rsquo;t left a crater in my breadboard) so it could run directly off of 3 AA batteries (1.5 v * 3 = 4.5 for alkalines, 1.2 * 3 = 3.6 for rechargeables)</p> <p>Of course, you could use 6 AA batteries and a 5v regulator, but who wants to use that many batteries? I use rechargeable AA batteries to power my portable projects and a 9v 1000 mA, UL listed DC power supply for my stationary ones (with the appropriate regulators of course)</p> <p>BTW, http://hlt.media.mit.edu/?p=1695 has a solution for those who want to make smaller projects using the Arduino environment. This makes for a relatively inexpensive project if you&rsquo;re looking to make a few small &ldquo;light show&rdquo; type devices and/or you&rsquo;re good at multiplexing. Since the Arduino Uno can be used as an ISP, I recommend picking up one of those, because you&rsquo;ll get to work with a pre-made board off the bat and then &ldquo;graduate&rdquo; to using one to program another.</p> Customer #408338 urn:uuid:1c089b55-423f-34a7-f993-a957f563bebf 2013-02-17T08:56:33-07:00 <ul> <li>8 pins -> ATtiny85</li> <li>14 pins -> ATtiny84</li> <li>20 pins -> which one is this?</li> </ul> MikeGrusin urn:uuid:0e7c2f10-085c-ef88-42fe-d0b1fdf1e4c5 2013-02-12T15:09:36-07:00 <p>You can use the internal 8MHz oscillator (and can divide that further down), or you can use an external crystal; the choice is up to you. The clock source selection is made while you&rsquo;re programming the chip. From experience the internal oscillator is reasonably accurate to begin with, but there&rsquo;s also a tuning register you can use to make it quite accurate. See the datasheet for all these details.</p> Customer #408338 urn:uuid:e4cfa919-b1c2-92c8-3fc2-c460a749d14a 2013-02-12T12:25:00-07:00 <p>Does this come setup with the internal oscillator or do you need to buy a 20MHz crystal for it? If it&rsquo;s setup with the internal oscillator, how accurate is it?</p> Dustin Lundquist urn:uuid:fe52911e-2423-cecc-54a2-c93d5d1ccd1a 2013-01-02T19:28:29-07:00 <p>Only the surface mount version is present.</p> <p>Submitted pull request with DIP package.</p> Customer #147286 urn:uuid:ab36e74c-13da-f4ed-4205-144b9ab28367 2012-11-26T14:19:34-07:00 <p>Is there an Eagle part for this in the SparkFun library? I couldn&rsquo;t find it, but I might have missed it.</p> Dawtty urn:uuid:dbd643dd-bfb9-4a8c-41bc-65d39f31f34a 2012-11-09T19:51:14-07:00 <p>How many output PWM pins does this have? I want to be able to individually control at least 4 rows of LEDs. Thanks</p> fungus urn:uuid:45cb6d6a-b984-2820-29df-f7fa49a60784 2012-09-24T03:39:35-06:00 <p>(Will work bare &hellip; although most people recommend adding a decoupling capacitor and an extra pullup resistor on the RESET pin)</p> fungus urn:uuid:82ad2a5c-8adb-1329-788f-e7ea6089b269 2012-09-23T11:28:20-06:00 <p>Love them&hellip;easy to fit in small spaces and they run at 8mHz with no external components whatsover. None. Zero. Zip. The chip and a power supply, that&rsquo;s all you need.</p> <p>The Tiny85 is a bit too limited. These are just right.</p> Customer #323116 urn:uuid:b8291bbc-85d8-f757-d3e6-8c72fcbc8f0f 2012-07-09T10:02:12-06:00 <p>YES!! the possibility is limitless!! i&rsquo;m going to build a prototype right after my order arrive.</p> SuperCrackMunkey urn:uuid:73d2598b-5819-04ec-b22f-c64565b3fc76 2012-06-03T15:25:16-06:00 <p>For 11¢ more, I&rsquo;m kind of thinking about these rather than the 85&rsquo;s. Plus 12 i/o would be nice. (Or maybe less if using crystal :p)</p> Customer #310431 urn:uuid:0f8d2afa-8710-a9e2-c117-f81c345682b7 2012-05-22T21:26:06-06:00 <p>Any plans for a 14 pin AVR development board?</p> ATtiny Fan urn:uuid:0ed05726-46b6-7aec-638f-5b9847355c71 2012-05-05T10:19:35-06:00 <p>Thank you Sparkfun! Now I can start my world Domination plan using ATtiny&rsquo;s with 8 Pins, 14 Pins, and 20 Pins.</p> Otzen42 urn:uuid:1f6b8dfa-ad77-a49e-6043-bbeb94d23ef3 2012-05-04T12:50:33-06:00 <p>Happy to see these here. They are a nice little chip. I still have a couple left in my stockpile, but I know where I will be replenishing my supply from now.</p> Anachronator urn:uuid:e359cdd9-e543-ce51-2124-229ee9e206e1 2012-05-04T05:22:08-06:00 <p>If you want to use the arduino ide with this, the MIT High-Low Tech group have done a great job with the integration: http://hlt.media.mit.edu/?p=1695</p> <p>I have one of these monitoring the temp/humidity in my frog tank. Works really well for a small project and is more or less a single chip 14 pin &ldquo;arduino&rdquo;.</p> Lord Nothing urn:uuid:37565324-5e5f-0a5d-19d9-32ffbceaf5a1 2012-05-03T17:54:35-06:00 <p>yay! a little-ish chip for little-ish projects. but not so little you run out of pins and yell obscenities at it.</p>