This blog post is about our current EV3 robot we're planning to use in the 2023/2024 FLL competition. Some features: 2 large motors for steering. 2 medium motors for attachments. 2 colour sensors for picking up the white and black lines, also used for line squaring. 1 gyro sensor. To enable attachments to be changed as quickly as possible we're using gravity to keep the gears connected, i.e. you don't need to fasten anything to the robot. Every attachment has 2x 12 tooth double bevel gear (part 32270) which comes in contact with the 2x 20 tooth double bevel gears (part 32269) on the robot. The medium motors are horizontally aligned on the robots, but we use 12 tooth double bevel gears to convert that to vertical alignments. These in turn are connected to 20 tooth double bevel gears, and the attachments in turn connect to these 20 tooth double bevel gears with their 12 tooth double bevel gears. The complete robot is modelled in Bricklink Studio 2 . You can download the rob...
Update: click here for installation instructions of OpenWRT 14.09 on TP-Link MR3420. The idea is to install OpenWRT 10.03.1 on a TP-Link MR3420 and configure it to use a 3G USB modem. I'll assume you have a Windows computer where you can connect with 3G USB modem. First flash the router with the OpenWRT image. See http://wiki.openwrt.org/toh/tp-link/tl-mr3420 for more details. Reboot the router. Then set your computer ethernet connection to a fixed IP address of 192.168.1.100 with subnet of 255.255.255.0. Connect the router port 1 to the computer. From the computer you should be able to ping 192.168.1.1. Then telnet to 192.168.1.1. You'll get a busybox shell, type passwd and provide a new root password. Once this is set telnet will be disabled and you'll only have access via SSH. Open a web browser to 192.168.1.1. Log in with username root and password as defined above. Then go set up your wireless settings & configure everythi...
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