Using HEF4094 Shift Registers with Arduino
I have many seven segment modules in my hand. Each module consists of 5 digits and each digit is controlling by individual HEF4094 shift register. As shown in figure above is the seven segment module.
HEF4094 is an 8-stage serial shift register. Data is shifted on the LOW-to-HIGH transitions of the CP (Clock) input. The product data sheet is available here.
HEF4094 operates over a recommended VDD power supply range of 3 V to 15 V referenced to VSS (usually ground). There is also 74HC4094 available which operates at 2V to 6V.
TP-Link TL-WR1043 V2.1: Upgrade to OpenWRT & DD-WRT and Reverting back to original OEM firmware
I own a TP-Link TL-WR1043 V2.1 wireless router, I would like to test if it is able to run on OpenWRT or DD-WRT. it is first tested on OpenWRT, DD-WRT later, so far it has been working flawlessly for me.
About TP-Link TL-WR1043 V2.1 Wireless Router
TP-Link TL-WR1043 V2.1 is a 300Mbps Wireless N Gigabit Router, it has more memory (64MB) compared with the TL-WR1043 V1.x. Here is the comparison:
|
HW Version |
CPU |
Ram |
Flash |
Network |
Gigabit |
USB |
Serial |
JTag |
|
1.x |
Atheros AR9132@400MHz |
32MB |
8MB |
4x1 |
Yes |
Yes |
Yes |
Yes |
|
2.x |
AtherosQCA9558@720MHz 64MB |
64MB |
8MB |
4x1 |
Yes |
Yes |
Yes |
No |
Setting up a wireless hotspot using TP-Link TL-MR3020 Wireless N Router
Raspberry Pi: Running Midori browser without a Desktop
Midori is a lightweight browser using the WebKit rendering engine and it is a default browser that is found in Raspbian. This is a quick quide to start the Midori browser from the command line without a desktop manager.
Setup a Raspberry Pi PHP web server
- Raspberry pi running Raspbian OS
- SSH client such as PuTTy
- If you like to use GUI ( Graphical User Interface), WinSCP is preferred
- Netscanner software for IP address searching