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Create Gulden address with Vanitygen and import in wallet

Having your own custom or personal Gulden address is rather cool. At least, I think so 🙂 You can make it with Vanitygen. Vanitygen was made to generate Bitcoin addresses but you can use it for any other crypto address. You can use the option X and then choose what letter you want the address to start with. More info about address prefixes found here. For Gulden we use -X 38.

Generating your own address with private key is also a great way make an offline wallet. This way you can keep your coins secure and you don’t need to worry about your computer crashes or your backup USB stick will fail in time. Having a digital back up AND an offline backup is also a good idea. For extra security best make a bootable USB stick with Linux on it, how to do this check this link (Dutch). For this tutorial I used a VM with Ubuntu 14.04 (easier for making screenshots). I already have installed Gulden wallet and it is 100% synced with the blockhain. Continue reading

Gulden wallet on a Raspberry Pi 3

Yes we are back again, long time no update here but I am trying to spend some more time again on my website. I have been busy with two new things in the world of crypto coins, first one is : Gulden ,great (scrypt) coin made in Holland ! awesome features, fast confirmations, strong community, great support, many nice features also check: nocks . Second is the Raspberry Pi 3 ! released on february 29 2016 and it is 64 bit ! also build-in wifi and blue-tooth. So I ordered on with powersupply and 32GB  SDcard at Sossolutions.nl and received the Pi3 within 2 days. Now combine the two, let install the Gulden wallet on the Raspberry Pi 3.

First thing is to install an OS on the Pi 3, I choose Raspbian and used the NOOBS way to install it, simply following their instructions and you have installed Raspbain in no time.


Once Raspbian is installed and your Pi is started up we can start to install the Gulden wallet. Continue reading

Great new SHA256 Mining Pools

I mined at btcguild, triplemining and st Eligius pools, they are stable and reliable pools. But then I read on bitcointalk about a new pool: CKPOOL made by: ckpool code by ckolivas and ckdb code by kano.

You can mine at http://www.kano.is with PPLNS reward with (only) 0.9% fee. It has a great performance. I mine at this pool for some days now and I see it has better performance than other pools I used before.

If you are a real dare-devil: mine SOLO at http://solo.ckpool.org. This pool is awesome, you mine together with other miners to find a block but if you are the one that finds the block you will get the whole reward of 25 BTC!! (minus a small fee of 0.5%). It is anonymous, just mine just with your walletaddress as worker, no registration required. I know the change you will find a block is very smal, it’s like a gamble but it is fun and exciting.

So come on fellow miners , join us at http://www.kano.is and http://solo.ckpool.org

Here is a quote from Ckolivas about CKPOOL:

About ckpool

Ckpool is a project by the cgminer development team designed to complete the circle between miners and pools from cgminer to ckpool. The bulk of the code work for this was commissioned and paid for, however I provided an incentive to the group commissioning the code to open the software up to all by charging less for free software than for closed code. Ultimately this should benefit bitcoin far more than me simply working on code for another pool. I intentionally chose to write most of the code from the ground up and not use external libraries to have complete control over all the code given past experiences of difficulty to debug failures in library code that was outside our domain with cgminer. The separation of the pool code from the database code allows the pool code to be ultra-scalable and extremely low overhead by dissociating any concept of share counts, user accounts, authentication, front ends, payschemes etc. etc. These can be as vastly different from the envisioned ckdb+postgresql+php interface as the administrator desires without any change to the core pool functionality.



The CKPool www.kano.is is doing great ! More miners joined and total hashpower had grown to 600+ THs and the pool has found 4 Blocks already in just 1 month ! So join us fellow miners !

http://www.kano.is CKPool BTC mining

http://www.kano.is CKPool BTC mining

Crypto Cause: Spinal Surgery Bill Funding!

Update September 20:
The cause for Scott has ended, we all raised a good sum of dollars to help him pay his medical bills.


Crypto Cause : Help out Scott Fargo !

Crypto Cause : Help out Scott Fargo !

Crypto Cause helps out people in need, special people who do lots of (free)work for the Bitcoin (and other crypto currencies) community. The cause that is activated on August 28th is for raising funds for Scott Fargo to get his medical bills paid. Here is his story: http://viturrex-pty-ltd.myshopify.com/blogs/news/16095159-cryptocause-project-2-spinal-surgery-bill-funding

Scott writes articles and does review of mininghardware at cryptocoinsnews.com . About Scott:

I am a disabled former Systems Admin, computer tech, business manager enjoying crytpo currencies. I am deeply involved in the mining ecosystem and physical coins, It fascinates me how it has brought people from all over the world together into a tight knit supportive community with commerce and tech.


I friendly ask everybody to help out Scott, you can donate or buy great Hashlets here: http://viturrex-pty-ltd.myshopify.com/collections/all

I donated some $ and bought a Hashlet PRIME 5M/hash which is mining now at ZenMinerCloud.

One String Miner Test 1

Today I was wondering why the first 8 build OSM (One String Miner) only hash between 23 en 26 GHs. I measured the voltage input in the boards: 11.4 V !! The PCI-E connectors from the PSU “only” supply 11.4V instead of 12V. Weird, I will investigate tomorrow. I had 4 DIY-1 kits left, build the first one just standard: pcb + heatsink. For power I used a cheap 12V 10A PSU from Dealextreme. You can adjust the 12V power output on the PSU some time for some tests:

No thermal paste between PCB and Heatsink + Artic F8 Fan (very low RPM)

Voltage [V] Temp [°C] Hashrate [GH/s]
12,22 56 32,8
12,30 58 32,26
12,14 57 32
11,91 54,6 31
12,40 59 31,6
12,10 56 31,4

With thermal paste between PCB and Heatsink + No Fan We will see how temperate gets higher after x seconds

Voltage [V] Temp [°C] Hashrate [GH/s] Time [sec]
12,10 35 31,70 10
12,10 36,6 31,80 60
12,10 39,2 32,05 120
12,10 40 32,08 180
12,10 40,7 32,14 240

Continue reading

One String Miner

Today I received my One String Miners. Great design by C-scape and Intron based on Bitfury chips. I won some miners at an auction at bitcointalk.com . Ben Turas is selling these great miners, designed in the Netherlands, produced in Asia!
Check out his salestopic.

The OSM is based on Bitfury chips and each board contains 15 chips, hashing 25+ GH/s without heat sink and 30+ GH/s with heat sink.  Each board runs from a single 12V supply, using ~25W.

I have 4 DIY1 and 4 DIY2 kits. This evening I build up the 4 DIY2 kits and build a small tower. Quality of the boards and other materials is high. Building was very easy. Screw the pcb to the heatsink, connect the wires to the powerconnectors, that’s about it. I used a BeQuiet PurePower 600W PSU I had laying around. Attached two fans, all in a temporary setup. 10 Port USB Hub is a Rosewill RHB-500. I used an ArchLinux PC, downloaded and compiled CGminer 3.12.3, turned on the miners, started CGMiner and it detected all miners. 3 miners were “ZOMBIE” at first but after just 10 seconds all boards were recognized and hashing. All works great with any issues. Temperatuur is stable with only 2 fans (in the most efficient position), 30 to 40 degrees Celcius. I haven’t tuned them yet so they hash around 25GH/s per board.

For now some photos, next few days I will do some more tests and tuning. I realy like these boards you should get some too!

Continue reading