I recommend this course for absolute beginners. This is for my students, to learn the basis of creating static websites.
Continue reading “HTML & CSS usefull course for free”HTML & CSS usefull course for free
Linguagem SQL – Módulo 3 – Subqueries
Neste artigo irei abordar a introdução a DQL (Data Query Language) – Linguagem de Consulta de dados, mas precisamente consultas dentro de consultas (subqueries).
Linguagem SQL – Módulo 2 – Junções e Agrupamentos
Introdução à linguagem standard para base de dados relacionais.
Neste artigo irei abordar a introdução a DQL (Data Query Language) – Linguagem de Consulta de dados, mas precisamente junções de tabelas e agrupamento de dados.
Linguagem SQL – Módulo 1 – Introdução ao DQL
Introdução à linguagem standard para base de dados relacionais.
Neste artigo irei abordar a introdução a DQL (Data Query Language) – Linguagem de Consulta de dados.
Xiaomi Mi Router 3 vs Xiaomi Mi Router 4
A Xiaomi recentemente colocou à venda o seu novo router Xiaomi Mi router 4, que vem substituir o seu famoso Mi router 3. O que há de novo? Vale a pena fazer o upgrade? É uma boa compra?
Depende… Se não tens um Mi Router 3 e queres um novo router, ou um wireless ou wired repeater, sim, é uma boa opção, não existindo um equipamento tão interessante (relação qualidade/preço) no mercado.
Se já tens um Mi Router 3 e estás a pensar em fazer um upgrade, a reposta depende da tua estrutura de rede.
Um Router económico e excelente para ampliar o sinal Wifi por menos de 35 euros
Xiaomi Mi Router 3
Trata-se de um router económico (abaixo dos 35 euros), que recomendamos vivamente para expansão de uma rede Wifi.
Este equipamento compete com equipamentos de marcas conhecidas, como a TP-Link e ASUS que rondam os 80€, mas por menos de metade.
A configuração do mesmo é muito básico, não necessitando de grandes conhecimentos na área, podendo ser feita via Web (na rede), ou via App (android ou IOS) Mi Wi-Fi.
GPD Pocket – Características e teste de desempenho
O GPD Pocket é um micro portátil da Marca Chinesa GPD, criado através de crowdfunding. O hardware é razoável para o tamanho, sendo que o preço pode ser discutível. Funciona muito bem com o Microsoft Windows 10, mas também suporta a distribuição de Linux Ubunto.
Testamos este dispositivo com o Antutu Benchmark e o Disk Benchmark para Windows 10. Veja os resultados…
Jump-start your battery car with other car (Quick guide)
1. Turn off your boosted car and connect the wires
A) Connect the red wire to the dead battery > positive terminal (+)
B) Connect the red wire to the live battery > positive terminal (+)
C) Connect the black wire to the live battery > negative terminal (-)
D) Connect the other end of the negative (black) cable to a clean, unpainted metal surface (such as the engine block) on the engine of the disabled vehicle. Try to find a spot on the engine far from the battery, as this connection might cause some sparks.
2. Start the booster car.
Let it idle for 5 minutes.
3. Try to start the car with the dead battery
If it won’t start, wait another 5 minutes and try again. If it still won’t start, check to see if there are other problems, such as a lack of fuel. Do not keep trying to start the dead car, as you might cause additional damage.
4. Once the dead car does start
Remove the jumper cables in the reverse order in which you attached them. Do not let the cables fall into the engine or allow any part of the cables to touch.
ORDER: D, C, B, A
Keep the newly jump-started car running for at least 30 minutes to make sure the battery recharges fully.
Hope this article was useful for you.
Install and promote a website on IIS (Windows 7, 8, 10)
Step 1: Install IIS (Internet Information Services)
1.1 First go to “MyComputer”
1.2 Click on “Uninstall or change a program”
1.3 Click on “Turn Windows features on or off”
1.4 Select “Internet Information Services”
1.5 Click OK.
Step 2: Create a Website on IIS
2.1 Run IIS Manager (or Find IIS)
2.2 Stop the Default Web Site
2.3 Create a New Web Site
2.4 Give a name and the Physical path.
Step3 (optional): Permissions (only if you have permission problems: HTTP Error 500.19 and/or 401.3)
Grant read permissions at group IIS_IUSRS and to the user IUSR for the folder of the website:
- On Windows Explorer, search for the folder that contains your website and select it;
- Right button of the mouse on that folder and click Proprieties;
- Click on tab Security and then, click on Edit.
- Click on Add;
- In the new box, write IIS_IUSRS and click on Check names, and then click OK;
- Repeat the step 5 for IUSR;
- Then click again on OK;
Step4: Test it on your browser
On your browser type http://localhost/
References: https://support.microsoft.com/pt-pt/help/942055/-http-error-500.19-error-when-you-open-an-iis-7.0-webpage
Power Bank benchmarks
This is a personal test for 5 different power banks that I buy:
- ROMOSS Sense 9 25000mA;
- TP-LINK TL-PB15600 15600mA;
- EC Technology PB-EC001 16000mA;
- MediaRange MR751 5200mA;
- No brand 2200mA.
This test here all done with:
- To meter the consumption I use a power meter KCX-017;
- For charging Charger 5V, 3A;
- For discharging I use a tablet Chuwi Hi10Pro (Android and Windows 10 tablet) that charges with a USB charging (playing YouTube HD/Full HD videos to drain the battery).
I’ve tested 5 different power banks, 4 of them Chinese (ROMOSS Sense 9, TP-LINK TL-PB15600, EC Technology PB-EC001, and a simple powerbank with a 18650 battery) and one german (MediaRange MR751). All were tested with the same KCX-017 USB meter and add the amount of 20 mA per hour of consumption in my measures.
When I was charging I use the KCX-017 to measure the Voltage and the current of the circuit with the same AC/DC power adapter that can give 5V 3A.
I’ve measured the time and the TOP power provided when I’ve charge the power banks and here is the results:
Capacity versus Reality (mA)
In this table I add 20mAh for the meter.
Output top power
Power = Max(V*A)
Charging time
Charging with a 5V, 3A (max) USB power adapter.
Power = Max(V*A)
Final results and opinion:
The most efficient was the one with the highest capacity with almost 66% of efficiency (ROMOSS Sense 9). Meanwhile, the one who charges faster the equipment that it is plugged and charges faster it (capacity vs time) is the TP-LINK TL-PB15600 who makes the winner of these tests.
