KiCAD knowledge base – Quiz Answer: KiCAD can have up to 32 copper layers

KiCAD can have up to 32 copper layers, quite plenty to finish even very demanding PCBs + 14 technical layers like masks, silk prints, components adhesives, solder paste, edge milling etc. + 4 auxilary layers for drawings and comments.

Thanks for all who participated the quiz. Random.org says our winner is @PetrMoses . Congratulations! Waiting to email us at info@olimex.com your address to send your prize.

 

Friday Free Board Quiz prize is A20-OLinuXino-LIME, Question: How many copper layers you can have in PCB design with KiCAD?

A20-OLinuXino-LIME is Open Source Hardware low cost Linux single board computer with native Ethernet, LiPo battery charger, native SATA and HDMI.

What makes different this board from other similar is that ALL board peripherals keep running from single LiPo battery in case of power loss. i.e. if you have SATA drive connected and USB dongles plug they will keep operating until battery discharge.

Recently we made upgrade to A20-OLinuXino-LIME2 which have Gigabit Ethernet and 1GB RAM and added industrial temperature -40+85C eMMC Flash 4GB which can operate in both MLC and SLC modeto A20-OLinuXino-LIME2-eMMC . Now we are one step away to offer completely industrial grade LIME2 as we successfully tested KSZ9031 Gigabit Ethernet PHY interface from Microchip which performs up to 700MB up and down link and Microchip is offering it in industrial grade too, so it’s matter of time to have completely industrial version of LIME2 operating -40+85C.

 

You can win A20-OLinuXino-LIME!

To participate in the Quiz is enough to re-tweet the Twitter Quiz announcement message.

To double your chances  answer the quiz question.

You have time to re-tweet and/or answer until Monday 20th of June.

In Monday we will post the correct answer and ask random.org to generate random number in range then announce the winner and ship the board by post/airmail.

Good Luck!

Friday Free Board Quiz – the prize is BOX-LIME-BLACK – Show us your desktop challenge!

BOX-LIME-BLACK is awesome metal box for LIME.

You can win this metal box! To participate in the Quiz is enough to re-tweet the Twitter Quiz announcement message.

To double your chances  we challenge you to post on twitter picture of your desktop.

People say that what’s on your desktop that is in your head.

To set example – here is my desktop, as you can see in my head is completely chaos:

I do wonder what is in the people head if their desktop is empty and clean 🙂

You have time to re-tweet and to show us your desk until Monday 18th of April.

In Monday we will ask random.org to generate random number in range then announce the winner and ship the board by post/airmail.

Good Luck!

 

Friday Free Board Quiz – the prize is Soldering Iron – Resonant circuits

CHN-SLD802 is low cost soldering iron with temperature regulator.

You can win this soldering iron! To participate in the Quiz is enough to re-tweet the Twitter Quiz announcement message.

To double your chances you have to answer the Quiz question

The Quiz question is: In a RLC series resonant circuit the voltage on the Capacitor leads is 10V the voltage on Inductor leads is 10V and the voltage on Resistor leads is 5V. What is the value of the source voltage which drive this RLC circuit?

You have time to re-tweet and/or answer until Monday 21th of March.

In Monday we will post the correct answer and ask random.org to generate random number in range then announce the winner and ship the board by post/airmail.

Good Luck!

 

Quiz answer

Removing superuser/root from Linux seems pointless, but interesting job.

The question sure was not defined well for purpose, I didn’t want to restrain your ideas.

Removing su and sudo from /etc/bin was my first guess when one asked me about this, but other interesting answers like to change root password with “sudo passwd -dl root” was something new for me.

Random.org picked our winner, see you next Friday!

Friday Free Board Quiz – the prize is BB-CH340T – How to disable superuser rights in Linux?

BB-CH340T is USB to serial converter made for breadboarding as replacement of the FDTI nasty devices

You can win this board! To participate in the Quiz is enough to re-tweet the Twitter Quiz announcement message.

To double your chances you have to answer the Quiz question

The Quiz question is: How to disable root/superuser rights in Linux? (and please do not try this on your computer :D)

You have time to re-tweet and/or answer until Monday 7th of March.

In Monday we will post the correct answer and ask random.org to generate random number in range then announce the winner and ship the board by post/airmail.

Good Luck!

P.S. Last weekend we got note that someone made several fake accounts and re-tweet other people answers. C’mon guys the idea of this Quiz is to provoke you thinking and learn stuff which you may not know. Please do not spoil the idea, we had Weekend Programming Challenge before with the same goals and there were hundreds of peoples who participated without any prizes just because it was cool. For the quiz we traditionally started with prizes and will continue, but please do not cheat! LEARN and google research things you do not know, just reading other people answers is not good!

Friday Free Board Quiz – the prize is A20-OLinuXino-LIME – Crystal Resonators Load Capacitors

A20-OLinuXino-LIME is our popular Linux OSHW computer.

You can win this board! To participate in the Quiz is enough to re-tweet the Twitter Quiz announcement message.

To double your chances you have to answer the Quiz question 

The Quiz question is: How load capacittors are calculated for crystal resonator which operates in serirs resonance?

You have time to re-tweet and/or answer until Monday 29nd of February.

In Monday we will post the correct answer and ask random.org to generate random number in range then announce the winner and ship the board by post/airmail.

Good Luck!