All posts in the 'Sensor projects' Category
Posted on 06 Jul 2008
An alternative controller for the Pinch Glove fingertip contact glove. Something as futuristic as a data glove should connect through USB, not RS232 as in the original design.This device fits into a very small SubD adapter housing, consumes low power (max. 20 mA), supports USB standby.[more]
Posted on 03 Jul 2008
The sensor ports on the NXT support a serial digital protocol called I2C, which was developed by Philips in the 1980’s for use in consumer electronics (in television sets, for example). This article describes the use of a simple I2C chip that provides 8 digital I/O ports with the NXT.Each one of these eight ports can be used as either input or output. These inputs and outputs are binary: they are either on or off.[more]
Posted on 25 Jun 2008
The circuit uses a constant current drive and a four wire connection to the probes. This allows almost any length of probe connecting cable without re-calibration.The current is set to 1.000mA. The circuit use MAXIM MAX4194 series of precision differential amplifiers. [more]
Posted on 17 Jun 2008
Michael writes:This project is the logical result from combining my wish to keep them out of my room with their natural fear of water. So far they had proven very hard to teach about my room. This means the solution had to be automated and on guard 24 hours a day. The idea for waterwall was born and now has become real. For entertaining purposes and lack of other use I threw my webcam in to - hopefully.[more]
Posted on 13 Jun 2008
This is a great LCD thermometer.The circuit used the diode as the thermo sensor to measure more than +100°C.ICL7136 of Intersil (Harris) is used for the thermometer and is measuring the change of the forward direction minute voltages of the diode by the temperature. The 3-1/2 digits liquid crystal display (SP521PR) is used for the display. The most significant digit can display only “1″.The consumption electric power of ICL7136 is very small and it is possible to operate about 3 months continuously with the 9-V cell.
[more]
