TTBIT Scrypt USB User manual

TTBIT Scrypt USB Stick Miner Official User Guide
Last updated on 27/01/2020
Page 1
TTBIT Scrypt
USB Stick Miner
Official User Guide

TTBIT Scrypt USB Stick Miner Official User Guide
Last updated on 27/01/2020
Page 2
Table of Contents
1. he First Glance..........................................................................................................3
1a. Where to purchase BI USB Miner..................................................................3
2. Accessories & Connection...........................................................................................4
2a. Where to purchase powered USB hub..................................................................4
2b. Connection............................................................................................................4
2c. Correct connection order.......................................................................................4
3. Setup (Windows).........................................................................................................5
3a. Silabs CP210x USB to UAR Bridge VCP Driver.................................................5
3b. Running bfgminer..................................................................................................6
4. Setup (Raspberry Pi)...................................................................................................8
4a. Using monitor and peripherals..............................................................................8
4b. Using console terminal..........................................................................................8
5. Setup (GNU/Linux)....................................................................................................10
5a. Using monitor and peripherals............................................................................10
4b. Using console terminal........................................................................................10
6. Basic roubleshooting (Q&A)....................................................................................12
7. Voltage and Frequency Adjustments (overclocking).................................................15
7a. uning..................................................................................................................16
7b. Memory Voltage..................................................................................................16
7c. Checking the core voltage...................................................................................17

TTBIT Scrypt USB Stick Miner Official User Guide
Last updated on 27/01/2020
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1. The First Glance
Welcome to BI Official User Guide.
Manufactured by BI , the Scrypt USB Miner is being produced in two colors:
Green and Blue. BI Scrypt USB Miner is one of the fastest and easiest to deploy
entry-level miners. With its own integrated cooling solution, it includes a 25mm fan,
so no need to come up with clumsy external fan solutions to keep these cool. It can
mine any Scrypt algorithm coins such as: Emerald Crypto Coin (EMD), Verge (XVG),
DigiByte (DGB), Bitcoin (via Nicehash), Litecoin (L C), Einsteinium (EMC2), Florin
(FLO), Gulden (NLG), GameCredits (GAME), Dogecoin (DOGE), Viacoin (VIA),
Myriad (XMY) along many other smaller Scrypt-mineable coins.
1a. Where to purchase TTBIT USB Miner
You can purchase BI Scrypt USB Miner on eBay:
BI L C Scrypt USB Miner

TTBIT Scrypt USB Stick Miner Official User Guide
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2. ccessories & Connection
2a. Where to purchase powered USB hub
You will need a powered USB hub that is capable of supplying at least 1-2A per port
(5-10W @ 5V). Some computers provide enough power for BI miner to work, but
this is not guaranteed.
If your computer is not up to the task or you want to use two, three, five or maybe
even 10 BI miners, I recommend to purchase this USB hub:
Sipolar 10 Port USB Professional Mining Hub
2b. Connection
a) Connect your USB hub to your host computer. Make sure the power adapter is
plugged in as well.
b) Insert the BI USB Stick Miner into the USB hub via the USB port.
2c. Correct connection order
Make sure that you plug in powered USB hub into your computer first. Only once you
do that, after few seconds, start plugging in your BI miners.

TTBIT Scrypt USB Stick Miner Official User Guide
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3. Setup (Windows)
3a. Silabs CP210x USB to U RT Bridge VCP Driver
If you purchased the miner from eBay link provided with this Guide, you will receive
software pack containing all required drivers. Download it and unpack the archive to
separate folder.
First, install Silabs CP210x USB to UAR Bridge VCP Driver. I included Windows 10
driver files (Windows 10 only!) in the folder “Silabs Windows 10 Driver” which is in
“Windows” folder. Open the folder and run CP210xVCPInstaller_x64.exe:
After successful install, you will see this screen:

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If you have earlier Windows version (Windows 8 etc.), you can go to Silabs website
and download driver directly:
https://www.silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-
drivers
Unpack downloaded file and run .exe file in similar fashion described above.
3b. Running bfgminer
Navigate to “Windows” folder included with this manual, you will find files similar to
this:

TTBIT Scrypt USB Stick Miner Official User Guide
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Run any of the .bat files, for example EMD_p2pool.bat. If everything is successful,
you will see a window similar to this one:
It’s important to see device listed here (MLD 0) and hashrate (in MH s).
Once everything is confirmed working, you can exit cgminer by pressing [Q] for Quit.
Now, modify pool settings by editing .bat file – right click on the file and select Edit.
You can enter your own pool settings and addresses and restart cgminer. I’ve also
included few more .bat files for different coins and pools, please have a look. Enjoy!

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4. Setup (Raspberry Pi)
If you purchased the miner from eBay link provided with this Guide, you will receive
software pack containing all required drivers. Download it and unpack the archive to
separate folder.
4a. Using monitor and peripherals
Navigate to “RPi” folder using file explorer.
Alternatively, you can copy the contents of “RPi” folder to your Raspberry Pi, using
any cloud service, ssh transfer or simply by plugging USB stick to your Raspberry Pi.
Once in the folder, you will find few example .sh files with bfgminer options there.
Doubleclick on chosen .sh file and select “Run in terminal” option. You will see
bfgminer window similar to this one:
If you getting error about missing libncurses.so.5 library, please install libncurses5
package using your package manager.
Once you verify that everything is fine, you can press [Q] to exit bfgminer.
o edit pool credentials to your own, simply edit chosen .sh file (don’t forget to
backup first).
4b. Using console terminal
o run all of the above from terminal (if your Raspberry Pi doesn’t have monitor and
peripherals attached):

TTBIT Scrypt USB Stick Miner Official User Guide
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Copy the contents of “RPi” folder to your Raspberry Pi, using any cloud service, ssh
transfer or simply by plugging USB stick to your Raspberry Pi.
Once complete, enter the folder:
cd RPi
here is few .sh files with bfgminer options, chose one and enter the command to run
it:
./EMD_p2pool.sh
If you getting error about missing libncurses.so.5 library, please install libncurses5
package:
sudo apt update && sudo apt install libncurses5
You open your miner everyday by repeating commands to enter the folder and run
the bfgminer (cd and ./ commands).
o put your own pool credentials, simply backup chosen .sh file and edit it using
nano editor:
nano EMD_p2pool.sh
Replace pool credentials in the file with your own, save the file by pressing C RL + O
and exit the editor by pressing C RL + X.

TTBIT Scrypt USB Stick Miner Official User Guide
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5. Setup (GNU/Linux)
If you purchased the miner from eBay link provided with this Guide, you will receive
software pack containing all required drivers. Download it and unpack the archive to
separate folder.
5a. Using monitor and peripherals
Navigate to “Linux” folder using file explorer.
Once in the folder, you will find few example .sh files with bfgminer options there.
Doubleclick on chosen .sh file and select “Run in terminal” option. You will see
bfgminer window similar to this one:
If you getting error about missing libncurses.so.5 library, please install libncurses5
package using your package manager.
Once you verify that everything is fine, you can press [Q] to exit bfgminer.
o edit pool credentials to your own, simply edit chosen .sh file (don’t forget to
backup first).
4b. Using console terminal
o run all of the above from terminal (if your Linux system doesn’t have monitor and
peripherals attached):
Copy the contents of “Linux” folder to your system, using any cloud service, ssh
transfer or simply by plugging USB stick to your Raspberry Pi.
Once complete, enter the folder:

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cd Linux
here is few .sh files with bfgminer options, chose one and enter the command to run
it:
./EMD_p2pool.sh
If you getting error about missing libncurses.so.5 library, please install libncurses5
package (works in Debian-based systems):
sudo apt update && sudo apt install libncurses5
You open your miner everyday by repeating commands to enter the folder and run
the bfgminer (cd and ./ commands).
o put your own pool credentials, simply backup chosen .sh file and edit it using
nano editor:
nano EMD_p2pool.sh
Replace pool credentials in the file with your own, save the file by pressing C RL + O
and exit the editor by pressing C RL + X.

TTBIT Scrypt USB Stick Miner Official User Guide
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6. Basic Troubleshooting (Q& )
Q: My TTBIT does not start up, or stops hashing after a while
While its normal for the ASIC to stop working randomly after extended periods of
time, you should have no issues running them for days. If you see that you have to
restart them ever few hours or sooner, or it does not start hashing at all on startup its
most likely because of two main reasons:
1) Your hub/USB port is not providing enough power for the given
frequency/voltage. ry lowering your frequency and core voltage so less power is
drawn, or use a port/hub that can provide at least 2A of continues current.
2) You have set your memory voltage too low. While lowering memory voltage can
reduce power draw, it also can increase instability in the device which will cause it to
need to be restarted often. rying increasing memory voltage to .9v for best reliability.
Q:Why does my X hub not work with my TTBIT miner?
Most USB 2.0 and a lot of 3.0 powered USB hubs will NO work with these sticks.
Powered USB hubs need to meet two requirements to reliably support the high
current these sticks draw. First they need to have a clean high quality power supply
that can output at least 1A PER port.
o run the sticks at full speed you need at least 2A per port. Second they need to
comply with USB standards which ALO of cheap hubs don’t...which causes a lot of
EMI issues and disconnects. Unfortunately its trial and error to figure this out. From
my experience, Sipolar 10 Port USB Professional Mining hub works perfectly fine for
this task, link to it here: Sipolar 10 Port USB Professional Mining Hub
Q: Bfgminer detects my TTBIT miner but nothing happens when it connects to
my pool
Please keep in mind that even though this is a very powerful scrypt miner for its size,
its still slow when compared to big, industrial ASICs with 1000Watts of power, which  
most pools are optimized for these days. Some pools have a share difficulty default
of 4k or higher, in which case it could take up to an hour for your BI Miner to find
and submit a share. In the meantime you are getting no Accepted shares, you need
to wait an hour each time. Even if you don’t see a share submission, you will know
your stick is hashing correctly right away because the ASIC diff on device is set really
low, so you should be able to see ~ 2 red LED flashes a second. If you want a faster
pool submission rate (again slow shares DOES NO effect profitability, since each

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share is just worth more), set your diff to 128, contact your pool operator for
instructions.
Q: When I connect to my pool bfgminer disables it with the following error:
Pool 0 misbeha ing (coinbase check), disabling!
Bfgminer by default operates with strict coinbase checks, which most mutlipools don’t
adhere too, to disable this check simply add #skipcbcheck at the end of the pool URL
like so: stratum+tcp://prohashing.com: 3333/#skipcbcheck
Q: I am using Windows and nothing happens when i click the .bat file
Your anti-virus software most likely deleted bfgminer.exe when you extracted it.
Make sure you create a exception in your antivirus settings to avoid this. You are
welcome to check and scan included files, they are free of any viruses.
Q: What frequencies can I set my TTBIT miner to?
he BI has a list of hard coded frequencies to ensure maximum performance for
a given frequency. Below is a list of valid frequencies you can use:
384, 450, 480, 540, 576, 600, 612, 625, 636, 648, 660, 672, 684, 700, 720, 744, 756,
768, 796, 832, 852, 876, 900, 924, 954
Default frequency is 600. Most stable overclock with works with majority of PCs is
768.
You can change the frequency by editing the bat file (under Windows) or sh file
(under Linux and Raspberry Pi), edit the number after: --set MLD:clock= 
If your miner becomes unstable, stops hashing or restarts frequently, disable
overclock and provide more USB power. weaking voltages also might be necessary
to achieve greater OC potential. However, please bear in mind that overclocking
voids any warranty and it’s recommended only for experienced users.
Q: Can I run TTBIT miner alongside Futurebit Moonlander 2?
Yes, you can mine with them together, they are 100% compatible with each other.
You can use original BI software or Moonlander binaries.
Q: How many TTBIT miners can I run at the same time?

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A: You can run as many as your USB hub can power. Please remember you will
need a powered USB hub that can do 1-2 amps per port for all the ports you wish to
use.
Q: Which mining pool do you suggest for mining Litecoin and Dogecoin?
A: We suggest using the BDice solo mining pool: http://ltc.tbdice.org/
How it works:
BDice automatically takes your litecoin address and gives you a unique stratum
connection mining to your own address. If you find a block, 99% of the 25L C +
transaction fees get generated directly at your litecoin address.
I’ve included example .bat file for Windows users (.sh for Linux), so all you need to
do is to edit TBDice_LTC_DGB.bat (or .s ) file and replace Litecoin and Dogecoin
addresses there.
Other (not solo) mining pools:
https://www.litecoinpool.org/
https://minergate.com/ltc-mining-pool/
https://www.multipool.us/
https://www.antpool.com/
Q: Which coins should I mine?
Mining popular and well established coins can be not so easy with entry-level USB
miner. Mining difficulty in Litecoin or Dogecoin is very high, you will be getting very
tiny amounts of coins each day.
Sometimes it pays to mine brand new coins in development or other promising
projects. hey have great potential to grow and can make decent profits, and also
you would be mining more coins per day comparing to Litecoin.
Examples:
Emerald Crypto Coin (EMD) https://www.emeraldcrypto.de/

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7. Voltage and Frequency djustments (overclocking)
Even with a fan built in, you can still overheat your BI at higher
frequencies. I do not recommend running these past 800mhz unless you can
closely monitor temps (if you have a IR temp gun check the top ASIC
heatsink, it should not be any hotter than 80C).
Below is a visual of the board for reference:
here are two pots that control the two main voltages feeding the ASIC. op
pot controls the memory voltage (when looking at the board with USB port
facing left), and bottom controls core voltage. You adjust the voltage by
turning the Pot clockwise or counterclockwise with a fine flat head or philips
screwdriver. he pots are VERY sensitive, the whole voltage range is within
HALF a turn in either direction from the stock position. You must do micro
adjustments if you want to do very fine tuning. For example going from .75
- .8 v might take as little as a little torque pressure on the screwdriver even if
you don’t feel it actually twist.
Make sure you have place the stick horizontal and the USB end is facing
LEF .
o turn the voltage UP turn the pot CLOCKWISE, to turn it DOWN,
COUN ERCLOCKWISE.
DO NO turn the pots more than 180 degrees in either direction, they have
no stops and if you go past their lowest or highest setting you could damage
them
o check the voltage use a multimeter and contact the ground wire to either
of the two ground terminals (circled and labeled ground in the picture), and
the positive wire to the outputs of the two inductors (circled and labeled
VCORE, and VMEMORY). Be extra careful not to short anything as a single
short anywhere on the board while its powered will most likely fry it. If you

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don’t have a multimeter, you can wing voltages by following the diagrams
below for Pot positions. Use the flat edge of the pot screw as the pointing
direction (DO NO OVERVOL at the high end if you don’t have a
multimeter to double check what the voltage is).
he sticks are shipped with the stock voltage settings of the pots (which is
the flat end of the Pot pointing down). he Core voltage is at around .75v,
which is good for up to around 800mhz stable, and ranges from ~.6 ->
~.95v . he memory voltage is set to ~.85v, and ranges from ~.625 -> ~1.05v
(more on memory voltage in tuning section below).
DO NO go past .9v on the core voltage, you will most likely damage the
ASIC if you run at high voltages and high clocks for prolonged periods of
time.
7a. Tuning
uning any switching transistor based processing unit revolves around
supplying enough current so the transistors on the chips actually switch on
and off correctly within their cycle times. he main voltage that will effect
performance and the tuning outlined below is the Core Voltage.
he higher the frequency the less time a transistor has to charge so you
need more current (i.e. turn up the voltage). If these requirements are not
met the transistors don’t function properly and you have what you know as a
“Hardware Error”.
7b. Memory Voltage
I included a Pot for memory voltage mostly for efficiency gains by
undervolting memory. Adjusting memory voltage should be a one time thing,
you set it at the lowest setting it will start hashing. here is no benefit in
increase memory voltage at higher clocks, as this wont increase your hash
rate or bring down hardware errors (this is entirely dependent on core
voltage). Either your device will work at a certain memory voltage or it wont,
so the goal is to bring the voltage down to the lowest possible setting that the
stick will still hash at.
he stock value for memory is supposed to be .9v, but my tests showed all
ASICs operate fine at .85v which is what they ship at. Most ASICs will work
fine down to ~.76 v.

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7c. Checking the core voltage
You will need a voltmeter to check and adjust the core voltage of your ttbit
device. First set your voltmeter to test voltage. hen place the positive (red)
probe on the VCORE probe point and negative (black) probe on the ground
point (see diagram below).
he stock VCORE value is 0.75V and is suitable for running your device at
3mh. If you want to overclock your device (hit the high speed of 5mh) then
you will need to change VCORE value to 0.90V. Use a small screwdriver to
turn the voltage core pot clockwise (only a small quarter turn is enough). Do
not over turn the pots, it could damage your device.