Step 2: install the socket

The first step is after finding a good sized perfboard is to find a good place for the chip, and place the IC socket where you want it paying attention to the notch witch will be matched with the notch on the chip. also find where you want your power jack. You should place it on the edge of the board probably in the corner. I widened the holes on the board with a 1/16 inch drill bit, but still had to fold the leads on the jack using needle nosed pliers to get it to fit through. On the jack, the pin on the back connecting to the post on the inside is positive, and the one on the bottom connected to the metal on the inside is ground (the pin on the side is not needed. You could solder it for extra support, but I just broke it off). Remember this when connecting the regulators.
<p>An awesome tutorial, and if not for Halo 5 coming out today, I'd jump right on it because I'm sure all I need is the Atmega haha. I have a question though, do you know what specifically allows a Digital Pin to be capable of Pulse Width Modulation?</p>
<p>where we programm in this hand made aurdino and Is every aurdino is resettable and Is a single aurdino can perform all the task of many aurdno</p>
<p>hey,</p><p>question about the power supply you used:</p><p>what voltage and mah did you use?</p><p>(I assume a 5V, but I don't know what mah)</p><p>thanks</p>
<p>Now, you will begin making connections on the chip. connect pins 7, 20 and 21 to five volts and pins 8 and 22 to ground.</p><p>What is you mean pin 7 ,20 and 21 to five volt?bcs i look from the picture look like you connect to pin 7 to pin 21 </p>
<p>I'm a kid of 12 years old can i make it.</p>
<p>Yes you can. As long you know what you're doing, because one wire soldered in the wrong place can fry the chip, but if you take your time and check all connections after turning it on nothing bad will happen. </p>
<p>Thanks for sharing such a good job! <br>Is these 6 male headers for SPI connection?? I wanna use CAN-BUS Shield with this homemade Arduino. Is it possible?</p>
Pal, I made better one!<br>https://docs.google.com/file/d/0B4zJys3uKtnaZWd5bW03SHRZZlU/edit?usp=docslist_api<br><br>I also attached the instructions for what I did.
Where is output pin of 3.3 v is placed and how to identify the polarity of 10 uf tantalum
<p>Hi can i use this to install bootloader into my atmega 328? it is </p>
<p>Hey what can you use as a substitute for the two 10 uf tantalum capacitors? I have all the materials except for that. </p>
<p>hi. do i need atmega328 p-pu with optiboot for aduino (https://www.sparkfun.com/products/10524) or it s ok atmega328 p-pu without optiboot (http://store.comet.srl.ro/Catalogue/Product/18656/) and what is the difference. Thank you!</p>
<p>bootloader allows you to re-program your arduino using uart bus, instead of spi. you can get plain atmega328 and burn the bootloader using spi, just for the first time. btw i havn't done this before, but i just can predict it. so anyone else sees i'm wrong in something, just let me know</p>
<p>can i use 8051controller in aurdino</p><p>im not understood what exactly aurdino board it is like a starter kit of 8051?</p><p>tanvirfakir@gmail.com</p>
<p>arduino = atmel microcontroller + bootloader + improved IDE , i don't think arduino has released kit supporting 8051 </p>
<p>Send me the schematic to the circuit at my email PLEASE...<br>v.luizzzzz@gmail.com</p>
<p>can someone say me the schematic to build an arduino using max232 and type-b usb socket</p><p> PLZZZZ....SOMEONE HELP !!!!</p>
<p>Help! help!! help!!!</p><p>Hello Guys, I am trying to manage the <br>movement of four(4) bit binary code over an Optical Link using Arduino <br>Board but am stucked, I don't know how to start.</p><p>Please I need Help</p>
<p>Help! help!! help!!!</p><p>Hello Guys, I am trying to manage the <br>movement of four(4) bit binary code over an Optical Link using Arduino <br>Board but am stucked, I don't know how to start.</p><p>Please I need Hel</p>
<p>thank you</p>
<p>could i mix a deumilanove's chip in that way with the uno's. i mean like chip exchange.</p>
<p>I don't see why not.</p>
<p>it would not get damaged would it?</p>
<p>At worst you might get a programming error, but the duemilanove uses the atmega168 I believe, which is identical to the 328 except it has 16k of program flash instead of 32k. But yeah, they have the same pinout and operating voltage so it should be fine.</p>
<p>I actually made two of them. The first one was the square one. It is rather ugly and messy. No polarity protection, dissimilar regulators, mostly salvaged parts. The programming LED is the big yellow one, and I used a resistor too small (150 ohms), meaning using pin 13 would be problematic because of the high current draw. I made errors installing the headers, so there are extra, unconnected pins on both sides. Both units sought to fit the most complete Arduino clone compatible with FTDI interface. Unlike the one presented here, I chose to add the 1Kohm resistors on the FTDI interface. Obvious defect: the headers are the small machined round type, which can't fit square male pins. Both use free wires to feed them, a rather personal choice as I have an old stabilized power supply fitted with screw connectors. Think about replacing that if you intend to use it with a wall wart. Both feature the standard 10-pin AVR programming interface present on the USBASP, as I didn't want to make an adapter.</p><p>The second one took it further, on a 15x25 perfboard, and designed to use in projects where space may not be large. As you can see, I had to fit some bulky components under the Atmega socket, itself made from female headers to allow for more space, and still doesn't use first-choice components but what I could find locally. It has dual regulators, polarity protection diode (1N4004, an OK replacement for the MBR0520 - telling from memory - in this application), and the 3.3V is a SMD unit that happened to be large enough for regular pitch, fed from the 5V from the 78L05 to save on space. I know it only gives 100mA, and if you attempt to make your own, try using the 78M05, which gives 500mA in the same footprint. I just have a lot of 78L05 in the parts bin. To keep a low profile, I used small LEDs: green for power (connected to the 3.3V regulator), white for pin 13. Unlike other common colors, it still gives a very powerful light with a 1Kohm resistor yet calculated current is only 3 or so mA.</p><p>Headers are unlabeled but thanks to the paler material this should be easier, and they do respect proper separation between them. The solder side is filled to the brims, and I don't think you could go any smaller using single-side board and through-hole components. With Atmega inserted, notch to the right, pinout is identical to original Arduino. I discovered a bit later that the design I used, as well as the one presented here, is closer to the 2009 version of Arduino.</p><p>Approximate cost for one unit: $7.50 You can make them even cheaper buying from Chinese or Thai vendors. They typically sell 100-packs of 2% precision resistors for $1 or $2. Salvaging used electronic boards from TVs or stereos usually is usually messy, but can yield appreciable amounts of small, through-hole resistors, capacitors, etc. Just don't forget to check them against their specs. I trashed carbon-based resistors as well as capacitors because they were out of their 10 or 5% tolerances.</p><p>proto board: 25&cent;<br>Atmega 328 (no P, had to modify Arduino's IDE config file): ~2$<br>Headers: 15&cent; for 40, probably 60&cent; worth of them here.<br>LEDs: 30&cent; each.<br>crystal: 50&cent;<br>capacitors: 15&cent; each, so 1.35$ (not cheap!)<br>resistors: same, so 90&cent;<br>Regulators: 80&cent; each.<br>Thin wire: I used phone wires, but wire-wrap style should be better. Cost unknown.</p><p>Cheap doesn't mean quick. Assembling a board from scratch and planning the routing in your head is a tedious process taking many hours, especially if, like me, you regularly unplug the soldering iron to relieve the tip.</p>
<p>Nice! Looks good!</p>
I made it, but just getting problem in programming it because I don't have any arduino board by which i can replace the ic.... <br><br>Is there any alternative way to programme it......
<p>You can get an FTDI breakout board, and connect that to the programming header. Set the the board to duemilanove (or any that use the ftdi converter chip) in the IDE and program as you normally would.</p>
<p>but how to program the atmega ic .... ?? just help me.....</p>
<p>The 6 pin header is for hooking up to an FTDI breakout board which allows you to program it with the arduino IDE.</p>
and is it atmega328pu or atmega328p-pu ???
<p>thanks </p>
<p>can i use 10uf electrolytic capacitor instead of tantalum capacitors?</p>
<p>I don't see why not.</p>
please can you provide a video for how to program the arduino board...
<p>Is this own created board interface with android OS?</p><p>OR Can we able to use all these features which are provided by Arduino board?</p>
Hi, I found this project very interesting and useful, but I had a crazy idea before, is it possible to build a complete arduino from scrap electric pieces ( resistors capacitors transistors etc... ) I know it will require much higher power but is it possible? How big will the board be?
<p>You can't build the Atmega in the arduino boards from junk.</p><p>The others parts can be found in scrap, but the atmega can be almost impossible.</p>
<p>Hi, if i already have an ATmega328 with bootloader on it i dont need to get an arduino pcb, right?</p>
<p>It depends.</p><p>You will need a device to upload the codes, I generaly use a USB-Serial converter, you will need it because the Atmega don't talk directly to the PC.</p><p>You can use the serial from a arduino board to upload the codes too.</p><p>My converter is based on the CP2102 chip, but the ft232 is popular between the Arduino folks.</p>
<p>For a really easy Arduino design check out ours: <a href="http://www.dcoptimum.com/arduino-breadboard/" rel="nofollow">http://www.dcoptimum.com/arduino-breadboard/</a></p>
<p>Hi. </p><p>I didn't test this homemade solution yet but i guess it has the same HW settings and </p><p>characteristics like the original arduino board. If so, then tell me, would it be possible to use your board for purposes like this:</p><p><a href="http://www.instructables.com/id/BLDC-Motor-Control-with-Arduino-salvaged-HD-motor/?ALLSTEPS" rel="nofollow">http://www.instructables.com/id/BLDC-Motor-Control...</a> </p><p>?. Thank you in advance !</p>
where is the usb plug port in the homemade circuit board , how to imply digital i/o pins ? how to connect the rx and tx ? can we program parallely to the board kindly reply to this question
<p>For a USB connection you can plug an FTDI breakout board to the programming header and program it normally from the arduino IDE. </p>
<p>Potentially stupid question from a newbie...what do I need to connect the breakout board to the arduino, and then to my pc?</p>
<p>The breakout board and a USB cable.</p>
<p>I use a crystal oscillator 27 MHS?</p>
<p>I think 16MHz is the maximum clock speed. Unless you wanted to overclock it...</p>

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Bio: Science is my passion. I find myself constantly working on countless experiments, from low energy particle accelerators to good old simple electronics. I also like ... More »
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