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Name: Steven Andresen
Member since: 2003-03-23 22:30:49
Last Login: 2007-01-24 17:11:07

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I am interested in electronics, engineering, and programming. I have been working with the related Fields for almost 2 decade. I have degrees in various fields of studies. I have built many devices and apparatuses, including sensor data acquisition systems, various types of robots and rovers. I build various systems mostly just for my own enjoyment. I have been a fan of for several years now. I would like to become a part of the discussions and help share ideas and thoughts with others. Unfortunately due to complications with rules and regulations related to many Internet services and the required maintenance for such services I had to terminate my network of 3 servers hosting various sites and services. As a result my own sites suffer from a lack of presence on the web. I am hoping to find another suitable service for my needs on the net and repopulate my old sites for the resources they contained. Until a new web presence is setup, any mention of web links below will not exist. This entry will be revised once the sites are returned to operation.

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I've been out of the robotics and automation scene for a couple years dealing with other issues, but soon I will be returning with many more advanced systems.

My current project in R&D right now is a Flight Attitude Assist for R/C Planes and Helicopters similar to the older autopilot system designed and presented here on This project will be following a different path for instructional and proto typing for future hobbyists, as well as an easy to use trainer for novice pilots. Public release of the prototype estimated some time between April and June of 2007.

This idea is driven and inspired from friends who wish to learn to fly R/C Helicopters. As for anyone who has attempted to control Arial R/C vehicles, such as planes and helicopters, knows that for the novice it is extremely intimidating to learn due to the costly effect of crashes.

Current To Do List includes:

- Evaluate various sensors for effectiveness and reliability; accelerometers, barometers, proximity sensors. (currently evaluating about 8-10 possible sensors)
- Form a group of individuals for collaborating on the project.
- Lease a new Internet web site for past and future projects, my old servers were shut down due to complications with services offered by my previously networked systems.

9 Apr 2003 (updated 9 Apr 2003 at 04:51 UTC) »

Well, here is my first diary post. I would like to first explain a little about what I am working on.

I am currently working with my first walking robot "Zept02" to modify and improve upon. I just recently expanded the I/O interfaces to a breadboard mounted on it's back for R and D. The main processor is a Parallax Basic Stamp 2sx, mounted on a custom made PCB with a voltage monitor & regulating circuit, as well as various relays and connectors. The voltage monitor is a cmos 555 timer configured with independent trigger and threshold circuits for the voltage level detector, and the output is fed into a regulator circuit, which controls the outputs to the various components. This is used to correctly maintain the Ni-cad batteries used for the assembly. Which is done by putting the processor into sleep mode and disconnecting the SSC from the power source. With the use of this circuit the robot will not walk until it's fully charged again. It recharges itself by searching out the highest light source to charge the batteries with a solar panel array. Because Solar Cells can only produce approximately 10-20% rated with average room illuminescense, it has a charge circuit that uses a dual charge pump for low light levels. It can take more then a week to fully charge indoors.

Power Ratings - Batteries: 4 (2x2) 1.2Ah 3.6V Ni- cad Cells (7.2V 2.4Ah); Current: 1.6A walking, 4-20mA idle (depending on accessories, charge pump for solar panels draws aprox. 8-10mA), 20-25uA sleeping; Charging: external jack input regulated for 9-15V, and 12(6x2) 3V @ 40mA photovoltaic panels (Solar Cells) connected to a dual charge pump witch produces about 8.6V 40-50mA in average room illuminescense (100W lamp @ 4-5 feet, actual values vary some); Weight: 4.7 lbs fully loaded, capable of lifting approximately 5.5 lbs

Here is what I have planned next:

I just recently ordered several different AVR micro's to test a new multi-processor design I am creating. As well as a good supply of other misc components and hardware. While I am waiting to pay off my AMEX card and save up for the next purchase, I will be working on communication designs.

The new design will incorporate various systems to control serial communications with a base unit as well as other devices. I am developing this for the next walking robot. The idea is to have the robots interact with each other, as well as communicate with a central stationary system. (Laptop) I am planning to build several small modules for both IR and RF serial communications.

After I can build and test a few of these communication modules I will start working on the next couple of walking robots. The plan is (pending funds) to build at least 4 walking robots that can interact with each other. The actual hardware design is still in the drawings and not set to plan yet. But I am planning to try out a few different hardware designs for the new robots.

I started this new project based on an idea from a recent article about an MIT award recipient, and his design for a swarm of tiny rovers that interact with each other, as well as other related articles.

Hope I can find the time for all this programming.

Deliriously insane!


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