Moin
After a lot of experiments with Atmel and servos the schematic design for the leg controller is ready. Unfortunately the Atmega8 has the I2C interface on 2 of the ACDs so only 4 ACDs are left. Therefore I have to use 1 Atmega8 for each leg to control the 3 servos. Besides the PWM servo control I also added 3 PWM LED controllers (via transistor). Just in case later on I decide to “pimp my robot” Well at least I can use them for visual debugging when I train the robot to walk. The idea of this schematic is quite easy. There are
2 connectors for the bus (i2c and power)
3 connectors for LEDs (transistor connected)
3 PWM servo connectors (with current (resistor) measurement)
1 SPI interface to flash the atmel onboard
Well its not a big deal but maybe someone finds it usefull. Next week I have to fight with placing it on a board without to many crossings.
Had some time this weekend to make next steps on my robotic project. This time the topic to work on was hardware. And yes real hardware not PCI carts or so. We started to think about how to design and construct the leg. Having no CAD software (and no idea how to use it) I just used a pen and a paper to draw a leg. Well it worked out and the leg works. But it looks more like a bone than like a robot leg.
I also made a movie of the leg moving but Youtube is still processing the data. As soon as they are ready I will post the movie here.
While searching for PWM for my atmel I found this video. If you want to see a robot dancing to WMCA and”Walk Like an Egyptian” have a look at the video.
Well at least I can use them for visual debugging when I train the robot to walk. The idea of this schematic is quite easy. There are
