OLIMEXINO-85-KIT
Assembly guide
Revision B, January 2013
Designed by OLIMEX Ltd, 2013

All boards produced by Olimex LTD are ROHS compliant

OLIMEX© 2013

OLIMEXINO-85-KIT assembly guide

DISCLAIMER© 2013 Olimex Ltd. Olimex®, logo and combinations thereof, are registered trademarks of Olimex Ltd. Other productnames may be trademarks of others and the rights belong to their respective owners.
The information in this document is provided in connection with Olimex products. No license, express or impliedor otherwise, to any intellectual property right is granted by this document or in connection with the sale of
Olimex products.
This work is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License. To view a copy ofthis license, visit http://www.creativecommons.org/licenses/by-sa/3.0/.

This hardware design by Olimex LTD is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported
License.
It is possible that the pictures in this manual differ from the latest revision of the board.
The product described in this document is subject to continuous development and improvements. All particulars of the
product and its use contained in this document are given by OLIMEX in good faith. However all warranties implied or
expressed including but not limited to implied warranties of merchantability or fitness for purpose are excluded. This
document is intended only to assist the reader in the use of the product. OLIMEX Ltd. shall not be liable for any loss ordamage arising from the use of any information in this document or any error or omission in such information or any
incorrect use of the product.
This evaluation board/kit is intended for use for engineering development, demonstration, or evaluation purposes only
and is not considered by OLIMEX to be a finished end-product fit for general consumer use. Persons handling the
product must have electronics training and observe good engineering practice standards. As such, the goods being
provided are not intended to be complete in terms of required design-, marketing-, and/or manufacturing-related
protective considerations, including product safety and environmental measures typically found in end products thatincorporate such semiconductor components or circuit boards.
Olimex currently deals with a variety of customers for products, and therefore our arrangement with the user is not
exclusive. Olimex assumes no liability for applications assistance, customer product design, software performance, or
infringement of patents or services described herein.

THERE IS NO WARRANTY FOR THE DESIGN MATERIALS AND THE COMPONENTS
USED TO CREATE OLIMEXINO-85. THEY ARE CONSIDERED SUITABLE ONLY FOR
OLIMEXINO-85.
THE DESIGN OF OLIMEXINO-85 IS BASED HEAVILY ON THE LITTLE WIRE'S
DESIGN BY IHSAN KEHRIBAR AND USES DIGISTUMP'S DIGISPARK SOFTWARE.
OLIMEXINO-85 WOULD NOT HAVE BEEN POSSIBLE WITHOUT THE EXISTENCEOF BOTH LITTLE WIRE AND DIGISPARK PROJECTS.

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OLIMEXINO-85-KIT assembly guide

Chapter 1. Introduction
Congratulations on buying OLIMEXINO-85-KIT! We hope you will enjoy soldering the
OLIMEXINO-85!
If you are completely inexperienced in soldering you might want to check a guide or two on
soldering for beginners. There are also a great number of how-to videos available online that might
give you some insights on the whole process.
We also sell the already assembled board – the name of the product is OLIMEXINO-85-ASM! Visit
our web-site - https://www.olimex.com for more information.
Before you begin, please check if your kit has all these items:

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OLIMEXINO-85-KIT assembly guide1x OLIMEXINO-85 board:

1x ATtiny85 microcontroller

1x microcontroller DIP socket

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OLIMEXINO-85-KIT assembly guide

1x set of male headers

1x USB type B connector
Note that we used to mount miniUSB before but it proved too challenging for soldering. If you haveminiUSB board just remember to solder the wires at the back of the miniUSB.

2x LEDs (red and green) – long wire goes to the + pad

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OLIMEXINO-85-KIT assembly guide1x button

1x 10uF capacitor – long wire goes to the + pad

1x 100nF capacitor

3x 1.5K resistors – color code BROWN-GREEN-RED-GOLD*

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OLIMEXINO-85-KIT assembly guide

2x 22R resistors – color code RED-RED-BLACK-GOLD*

2x diodes

More information about the values and the packages of each of the elements that the board uses
might be seen in the appendix at the end of the document.
*The resistors can be distinguished by their 4-band color code. The value for the resistors is
calculated as : RED-RED-BLACK-GOLD – 22 x1 +/-5% = 22 Ohms +/-5% ; BROWN-GREENRED-GOLD – 15 x100 +/-5%=1500 Ohms +/-5%
Please refer to the table:

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OLIMEXINO-85-KIT assembly guide

Chapter 2. Tools needed
1. Solder – “glues” together the board and the electronic components. Consider getting lead-freesolder. Lead is toxic.
2. Soldering iron – to melt and apply the solder.
3. Pair of cutters – to shorten longer cathode and anode wires. The cutters are also used to clear thebottom of the board after soldering.
It is a good idea to use a stand for holding the board while you solder. At the end you will need acomputer with a proper USB type B cable to connect and program.
Some people might use soldering flux. Remember that after using flux you need to clean the board
from all leftover flux!

Chapter 3. Soldering
The top side of the OLIMEXINO-85 board is the one that features the name of the board and therevision! Not only that – the top side has the names and the positions of each of the components of
the kit! Make sure that you take a look at the white print and you have identified the position andthe orientation of each of the components before you grab the soldering iron!
There are four things to remember before starting to solder:
1. Remember that all components are placed on top and their wires go to the bottom of the board.
All soldering (except for the mini USB) should be done at the bottom!
2. Remember that you shouldn't connect pads or component pins with solder! This might lead toshort circuits – damaging the board or components irrecoverably if you power the board that way.
Before powering the board ensure no short-circuits are present.
3. Remember that your soldering iron takes at least couple of minutes to reach operating
temperature – if it doesn't get hot enough you might have trouble melting the solder. You shouldn't
hold the soldering iron pressed on the components for long periods of time! This might burn thecomponents or the board paths!
4. The components come with long wires – it is good practice to shorten them a bit before solderingand further shorten them after soldering – this makes the finished product more reliable – longer
wires lead to easier wire corruption due to component twisting or bending, or even worse – it mightlead to short-circuits if they are longer on the bottom. The wires should be cut with a proper pair ofcutters.
You should pay attention to three important things about the ORIENTATION of the diodes, theLEDs and the capacitor:
1. When placing the LEDs keep in mind that they have a long and a short wire that shows which ofthem should go to the “+” of the element pad, and which should go to the “-” – the long wire of the
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OLIMEXINO-85-KIT assembly guide

LED is the anode and in our case should go to the “+” of the LED pad.
2. The capacitor C1 also has a long and short wires – the long one should go to the + pad. Youmight see the cathode markings on the side of the capacitor (over the short side).
3. There are two diodes (not the LEDs!) that has to be orientated in different ways depending on theblack stripe they have! Carefully observe pads D1 and D2 and place respectively.
In what order to solder the elements? Generally, it is good idea to start with the parts which are
the shortest – e.g. leaving the USB connector, the big capacitor C1 and the microcontroller socket
for last. Recommended soldering order:
1. Diodes – placed on D1 and D2 pads – they should be orientated as the black mark is specified on
the pad – they are in opposite directions – refer to the respective pad drawing
2. 22 R resistors – these two resistors are placed on R4 and R5 pads – they don't require special
orientation
3. 1.5 K resistors – these three resistors are placed on pads R1, R2 and R3 – they don't require
special orientation
4. C2 – capacitor C2 is placed on pad C2 and doesn't require special orientation
5. C1 – capacitor C1 is the tallest component on the board – you should place the side that shows“zeros” to the “-” pad.
6. Reset button – placed on RST pad and doesn't require special orientation
7. Power and status LEDs – placed on pads PWR and STAT – be careful with the color and theorientation. The long wire should go the the + of the pad.
8. DIP socket – the component that would hold our 8 pin AVR microcontroller. There is a small dent
on the socket which is also marked on the white print – the dent should be used a marker for the
positiong.. It is a good idea to place the ATtiny85 after soldering everything else and just before you
power the board. Note that the microcontroller ATtiny85 has a small dot on it – the dot should beon the side of the DIP socket's dent! This dot marks the first pin of the microcontroller.
9. The USB type B – should be placed on the USB pad
10. The set of male headers – has to be placed at the edge of the board – the shorter part of the pins
should be put in the board (and soldered from the bottom) while the plastic part should be on the top
side of the board.

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Chapter 4. Connecting to the Digispark IDE
The ATtiny85 of the OLIMEXINO-85 is pre-programmed with a bootloader that allows it to act as a
USB device so that it can be programmed by a modified version of the Arduino IDE. The
OLIMEXINO-85 runs the “micronucleus tiny85” bootloader, an open source project written by
Bluebie: https://github.com/Bluebie. The bootloader is used by the Digispark board – the board thatinspired OLIMEXINO-85. Note that currently OLIMEXINO-85 uses the VID/PID pair that
Digistump donated to the community.
For complete instructions on how to use please visit
http://digistump.com/wiki/digispark/tutorials/connecting.
Digispark have bundled the open source Arduino IDE (v1.04) with their Digispark Addons to makeit easy to get started.
Download Digispark's Arduino IDE from the links provided at the web page and remember toinstall the drivers as explained in the same tutorial article.
There are also good instructions on how to select the proper board so you can upload programs. It is
important that due to the small size of OLIMEXINO-85 it has a specific set of settings and a special
algorithm of uploading.
OLIMEXINO-85 is recognized as “Digispark 8mhz - NO USB (Tiny Core)” under “Tools →board”You should also set the “Tools → Programmer” to “Digispark”.

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When you have a program ready to upload you need to disconnect the board! Then press the upload
button and you will be asked to connect the board in the next 60 seconds. After you connect the
OLIMEXINO-85 don't press anything and just wait until the code is uploaded!

There are a number of examples in the demo pack available for download in thesoftware section of the official OLIMEXINO-85 web-page.

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Appendix I. Bill of materials
QTy VALUEDEVICEPOSITION(S)3

1.5k/0.125W

R-EU_0204/5

R1, R2, R3

2

1N4148/DO35

D1N4148-7.62MM

D1, D2

1

10uF/16V/105C(5x11mm,RM2)

CPOL-EUE2-5

C1

2

22R/0.125W

R-EU_0204/5

R4, R5

1

100nF/2010

C-EU025-025X050

C2

1

ATtiny85-20PU+(DIL-8)+(HR1x8)ATTINY85

U1

1

LED/3mm/Green

LED3.0MM

PWR

1LED/3mm/Red

LED3.0MMSTAT

8TESTPAD3TESTPAD3#0, #1, #2, #3, #4, #RST,
GND, VCC

1

TSR-1(T1101GP/6x3x4.3)

SW-TAKT3

RST

1

USB-B

USB_SHIELD

USB

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OLIMEXINO-85-KIT assembly guide

Appendix II. Product support
For product support, hardware information and error reports mail to: support@olimex.com. All
document or hardware feedback is welcome. Note that we are primarily a hardware company andour software support is limited. Please consider reading the paragraph below about the warranty of
Olimex products.
All goods are checked before they are sent out. In the unlikely event that goods are faulty,
they must be returned, to OLIMEX at the address listed on your order invoice.
OLIMEX will not accept goods that have clearly been used more than the amount needed toevaluate their functionality.
If the goods are found to be in working condition, and the lack of functionality is a result oflack of knowledge on the customers part, no refund will be made, but the goods will be returnedto the user at their expense.
All returns must be authorized by an RMA Number. Email support@olimex.com for authorization
number before shipping back any merchandise. Please include your name, phone number and ordernumber in your email request.
Returns for any unaffected development board, programmer, tools, and cables permitted within 7days from the date of receipt of merchandise. After such time, all sales are considered final.
Returns of incorrect ordered items are allowed subject to a 10% restocking fee. What is
unaffected? If you hooked it to power, you affected it. To be clear, this includes items thathave been soldered to, or have had their firmware changed. Because of the nature of the
products we deal with (prototyping electronic tools) we cannot allow returns of items that havebeen programmed, powered up, or otherwise changed post shipment from our warehouse.
All returned merchandise must be in its original mint and clean condition. Returns on damaged,
scratched, programmed, burnt, or otherwise 'played with' merchandise will not be accepted.
All returns must include all the factory accessories which come with the item. This includes
any In-Circuit-Serial-Programming cables, anti-static packing, boxes, etc.
With your return, enclose your PO#. Also include a brief letter of explanation of why themerchandise is being returned and state your request for either a refund or an exchange.
Include the authorization number on this letter, and on the outside of the shipping box.
Please note: It is your responsibility to ensure that returned goods reach us. Please use areliable form of shipping. If we do not receive your package we will not be held liable.
Shipping and handling charges are not refundable. We are not responsible for any shipping
charges of merchandise being returned to us or returning working items to you.

The full text might be found at https://www.olimex.com/wiki/GTC#Warranty for future reference.

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