Prototype Power Amplifier
This unit was capable of approximately 85W RMS with a peak power output over 100W! This was the first amplifier I built that was over 50W as well as the first time I used this particular audio...
View ArticleCustom Speaker System
While building custom amplifiers over 20W I found that my bookshelf speakers were too weak to handle the power and I never test amplifiers on my good home stereo speakers so it was time to build a...
View ArticleA Conversation About Perceived Value
A customer asked a contractor friend of mine how much it would cost to do this project. My friend gave him a proposal: $4500Customer: That seems really high.Contractor: What do you think is a...
View ArticlePrototype Audio Controller Main Board
Sometimes when you etch your own PCBs using resist ink, you can have issues such as over or under etching the board. But I hadn’t expected that my failure to clean and seal the board properly after...
View ArticleAudio Level Meters
These level meters have 22 LEDs arranged as two rows of eleven and could be set to display in bar or dot mode. These level meters mark the final version of the circuit used. The only change is the...
View ArticleBS2-OEM ‘LITE’
The BASIC Stamp Microcontroller can reduce the development time of many applications and therefore is a popular platform for both beginners and intermediate developers. However the cost of the BASIC...
View ArticleDS1302 Demo Code [BS2]
Some time ago on the Parallax Support / Discussion Forums I posted a message about getting together some code for the DS1302 which would endow the average user with the necessary information and code...
View ArticleBuild A Better Mousetrap
They say, “necessity is the mother of all invention”. Well, if that’s true then this project is living proof! Mice beware of the Mouse Motel! This project is designed for mice, but could also be...
View ArticleBASIC Stamp Alarm System
Prototype Design I originally started designing this alarm system while experimenting with the EDE1144 Keypad Decoder IC. I was trying to think of good uses for it and of course, and alarm system is a...
View ArticleDigital Thermostat
This project is kind of re-inventing the wheel and cost more to build than to buy something similar. But the whole point is to have a little fun building something yourself, gaining experience from it...
View ArticleCustom Serial LCD Backpack
When I first got into BASIC Stamps I was also introduced to the increasingly popular serial LCD since typical microcontrollers would lose too many pins to control a parallel interface LCD. For a...
View ArticleKnight Designs Computer Blowout
This video chronicles what my computer business used to do with old proprietary computers such as COMPAQ, HP and Gateway.
View ArticleM-Sorter
Parallax has an interesting kit called the M-Sorter. It sorts M&M candies and even Skittles. The device is incredible and ingenious in it’s simplicity and design in that the whole project runs with...
View ArticleDigital Alarm Clocks
It seems that time is always slipping away from us at an ever quickening pace. This seems more apparent when we’re doing the things we enjoy, hence the saying, “time flies when you’re having fun”. When...
View ArticleAccessory Tester
History For a while at Parallax it seemed we had quite an influx of sensors and accessories coming in which needed test procedures. Usually each product gets its own tester, custom to the product....
View ArticleM5 Stuart Tank R/C Conversion
Back in January of 2006 when the stores were clearing Christmas items, Ken Gracey of Parallax Inc picked up this tank for a mere $25.00 on clearance. Knowing that I was looking for a platform larger...
View ArticleGarage Parking Assistant
Free of Tennis Balls When we moved into our new house we upgraded to a bigger garage than we had before. My wife now parks in the garage, something she did not do before. Her main problem is not...
View ArticleSolder Pot Controller
In 2006 to be RoHS compliant Parallax Inc moved toward making all products lead-free including the BASIC Stamp Modules which they manufacture in-house. This required a new Lead-Free Solder Pot to dip...
View ArticleRFID Reader Software for Windows
This application has a small form which allows you to select and open the COM Port for the RFID Reader Module and enable or disable reading as necessary. By default the RFID Reader Module is enabled...
View ArticleBudget Robotics (Base on a Budget)
Sometimes building your own robot is easier said than done. It can be easy to visualize what we want but then to actually build it can be more difficult or in some cases seemingly impossible. Other...
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