Saturday, May 6, 2017

I read all that crap about going to mars and colonising and teraforming it. Well, unless we are able to do just that here on earth on Australia and sahara were we have all the resources available  I don't see how we will be able to do that on mars. All that is just wishful thinking

Sunday, April 9, 2017

How to clean old yellow plastics

So I found myself in the position to need to return to former white glory some old plastic bits that had become yellow over time, even though didn't sit in the sun.

So thanks to the following write up I managed to do just that.
I bought some Hydrogen peroxide 12%. "Cream Peroxide 40Vol" from a hair saloon supplier for about 12 euros delivered, put the gel on the plastic bit wearing a glove, put it in a sealed transparent plastic bag and let it steam under the heat of an IR lamp.

Since it is winter and the sun is at a premium this time of year, and not wanting to wait till summer to do it, I used a Blacklight lamp, which for some reason blew up within 30 minutes from the start of the experiment and didn't do much during that time. Afterwards I let the item all night under a fluorescent lamp, which also didn't seem to do much about it. Eventually I tried the heat IR lamp and within 3 hours, the item was becoming visibly white. Since the gel in the bag was visibly evaporating on the surfaces of the bag as droplets, I tend to believe that heat is more of a catalyst than UV radiation. But honestly I don't know.

All I know is that it worked!!!

1st application.

Although the difference is striking, in close inspection, there was some residual colouring almost as camouflage patterns. Not very obvious, but it was there. In any case the end product was much better.

About fake power tools

I have been looking for some cheap power tools, and was surprised by some Makita prices on ebay. So I was sceptical about the quality of such tools. I was also looking at some Bosch hammers and after seeing some genuine ones

I spotted this obviously fake tool

To the seller's credit, he didn't try to pass it as a BOSCH Hammer tool, however its almost identical !

Unfortunately on Ebay, most sellers selling cheap makita drillhammers do not have an actual photo of the item, but generic ones not allowing to make a judgement about authenticity before actually buying and receiving said tools.

Monday, March 27, 2017

Android TV HDMI Stick Firmware Upgrade RK3066

I had a relatively old, no name, HDMI Android TV stick, with rockchip 3066. At some point stopped booting. It would remain stuck at R-Box boot logo. Not remembering where I got it from and not being able to find a firmware online I replaced it with another one and it remained on a shelf collecting dust.

I do not like my stuff to be fautly, and since I had some time to kill, I start searching for a proper firmware.

first of all, I visited to download the proper flash tool for dual core chips. (RK3066 (Dual-Core) Firmware Image Flashing: English RKbatch Tool v1.5)

Of course one needs the proper drivers too, which I had downloaded in the past and dont remember where from.

Then because my particular Android stick didn't have a reset button i was thinking about using the directions shown bellow:

but then it occurred to me to look if the PCB board had contacts for an absent reset switch.

 and I did! On the pcb there was 2 unpopulated contacts with a rectangle and a circle inside, as shown above which when shorted with a metal pin, immediately the stick went into flash mode and was recognised by the flash tools.

After a few fruitless attempts to locate a firmware that would work on this one (most returned an error about the Chip) I found one that upgraded flawlessly! I plugged the Stick on the TV and worked!!!! After more than a year collecting dust, it was working again!
The firmware that worked for me was the following: TV-HDMI-200BT(V1.0)_20130312.

Unfortunately after some testing I realised, that the WIFI wasnt working, but that is a minor problem since it can playback video from USB, which was its primary usage anyway. I found more problems, like the SD card wasn't accessible, the bluetooth didnt seem to turn on. But at the moment I dont care.

Wednesday, January 4, 2017

considering an electric

So I seriously consider buying an EV vehicle for city usage. After all 95% of my needs would be covered vu the 80miles radiu offered by Nissan leaf. I live on a small island after all. However I don't have the buying capacity to spend 25-30k for a new car not to mention that arednt sold officially here in Greece. By a stretch most I could afford would be a second hand car nor over 10000€. And that with financial help from the family.

It has a variety of advantages. No yearly tax for the forceable future as long as EV cars remain scarse here and no new legislation decides to milk them for money. Electricity is much cheaper for running the at the moment.

Don't require any specialised mechanic, doesn't have Much mechanical parts to break down. Although it will require an electrician, if something goes wrong.

The problem I for see in the future more and more will be on the roads, electricity will go up, it is bound to lose its privileged tax free status, oil prices will go up as demand slows and less billions are spend in new oil production capacity. Battery technology is bount to get better, which means that people will get stuck with vehicles losing their value and range faster if current second hand EVs are any indication.
 If no after market batteries exist for cars like the leaf and Renault fluence in reasonable cost, then... EVs are kinda here to bring us "doom"

Sunday, October 16, 2016

Samsung Galaxy Alpha screen replacement

Among the family phones, we have a Samsung Galaxy Alpha (the non exploding variety) which suffered a curiously broken screen while in its case. Anyhow after checking online on how to replace the glass screen (there is a variety videos on youtube) I decided to get both a replacement screen assembly, and a spare glass alone in the tune of ~5€ and ~100€. 

The idea was to change the screen assembly which was fairly easy and then replace the broken glass on the original screen and keep it as a spare or sell it cheaply online.

The disassembly is fairly easy using a heat gun. The glue holding the screen softens and can be easily lifted using a thin object. The is only one connector between the screen and the phone. Care must be taken for the button area where two small stickers on the left and right of the button might not be readily off.
Placing the new screen assembly on was a piece of cake.

However, when I attempted disassembling the glass from the LCD, disaster. The LCD broke in a variety of places. First it partly detached from the digitizer glass and I didnt realised it at the moment, but kept trying.

Since I don't have the fancy vacuum table to keep the screen steady that might be a major factor.

All in all, changing the whole screen assembly is easy. Replacing the glass is not.

Thursday, October 13, 2016

Εντυπωσεις JUMBO Ντουλάπα Υφασμάτινη 100x46x174

Η συμβία αποφάσισε και αγόρασε μια υφασμάτινη ντουλάπα από το Jumbo. 
Και στη συνέχεια με έχωσε να την συναρμολογίσω. 
Αν με είχε ρωτήσει πρώτα θα της έλεγα να βρίσκαμε κάτι πιο ποιοτικό. 
Με το που την είδα από κοντά όμως απογοητεύτηκα εντελώς.

Το "υφασμα" ειναι του είδους που μοιάζει και σκίζεται σαν χαρτί. Και μετά από λίγο καιρό, 1-2 χρόνια αποσυντίθεται μόνο του κιόλας όπως είχαμε εμπειρία από σακούλες μαζέματος χειμερινών-καλοκαιρινών ρούχων.

Οι πλαστικοί σύνδεσμοι που συγκρατούν τους μεταλλικούς σωλήνες ειναι λεπτοί σαν τσιγαρόχαρτο, όπως και οι σωλήνες με αποτέλεσμα να μπορεί να κρατήσει το βάρος της, αλλά ουσιαστικά τίποτα περισσότερο.

Μέσα σε 2 μήνες είχε λυγίσει υπό το βάρος των παιδικών ρούχων και μεσα σε 3 μήνες είχε σπάσει.

Θα πρότεινα αν σκέφτεστε να την αγοράσετε, να κρατήσετε τα χρήματα σας. Είναι προτιμότερο να ανέβετε στο Galaxy του Hilton και να πετάξετε τα 19.99 (σε πεντάευρα μην χτυπήσετε και κανέναν)  στον δρόμο από κάτω, παρά να αγοράσετε αυτή τη ντουλάπα. Θα χαρείτε περισσότερο.