A simple 2 DoF setup with an accelerometer (LIS302DL) attached to the effector. The seeeduino attempts to drive the servos so the Z and Y axis measure zero acceleration. The sketch is available at the usual place.
The algorithm employed is a simple PD controller with pseduo-gradient stepping to determine …
It is often a pain building H-bridges or getting a motor shield just because you want to control a few motors. This is where servos come in: they are cheap(ish), have motor and gearbox, and they are controlled ysing only a single wire.
The only problem is of course …
The arduino ADC is 10bit, which means the range is 0-1023 and this is mapped to 0-5V most of the time, unless you do funky things to AREF.
Most amplifier circuits on the net (using op-amps or LM386s) will have a DC bias of 2.5V, this is to allow …
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[DIY digital spirit level](http://www.flickr.com/photos/sentientintelligence/3134648563/)
Originally uploaded by [sentientintelligence](http://www.flickr.com/people/sentientintelligence/)
A simply digital spirit level using a LIS302DL accelerometer from nkcelectronics coupled with a seeeduino for processing and a 2x16 …
Dicksmith Electronics is dead to me now. Dead as a door nail, dead just like Tandy.
When I was growing up, Tandy and DSE were the two places I went to get my electronic parts and information. The Engineer's Mini Notebook series and Getting Started in Electronics sold at Tandy …
2x16 character LCD displays can be tricky beasts. I got mine working today with my seeeduino (an arduino compatible board with more awesome), and really wished I had known that:
The contrast pin needs to be in the same power network as the power and ground pins. The contrast pin …
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There is it, the new current limited H-bridge for my team's SUMO entry. Put it together this afternoon, and will be mounted on a piece of perspex (which I forgot to bring home) and then mounted on the robot.
Statistics:
Numbered …
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[evolution of a circuit layout](http://www.flickr.com/photos/sentientintelligence/2646562132/)
Originally uploaded by [sentientintelligence](http://www.flickr.com/people/sentientintelligence/)
Half way mark to a 4 channel motion controller. Version 3 of the layout seems to work well and …
Finally got around to using piklab-prog to program my surplus 16F84As. The command line options are a little confusing, so here is what I used:
piklab-prog -d 16F84A -t /dev/ttyS0 -p direct -h 'JDM classic' -c program led_test.hex
For some reason there is a hardware option which doesn't …
Got my log clock running. ~~It is not entirely accurate, loses a second every 7hr or so. However its nature is such I doubt it will really matter.~~Thanks to the JAL interval library routines, it is very accurate. I originally thought the next interval routine returns after the 1 …
PIC-PG2C is a simple JDM serial FLASH programmer. It runs directly off the serial port, requiring no external power source. There is some concern it will not work with low power serial ports, such as those found on laptops. I am happy to report however that it works on an …
After seeing what can be done with a webcam, I decided to try it. I asked my cousin for her webcam which she bought a while back - some generic Chinese product, with no identifying brands. macam reported it as Generic ZC031P Webcam.
So anyway I dis-assembled it (with permission of …