A project I am working on requires temperature data to be sent periodically (about every 5 minutes) from a sensor node to a data logger using an XBee radio. The project requires the sensor to operate using battery power for two weeks. To conserve power, I built a 3.3 V breadboard Arduino with a efficient
A project I am working on requires temperature data to be sent periodically (about every 5 minutes) from a sensor node to a data logger using an XBee radio. The project requires the sensor to operate using battery power for two weeks. To conserve power, I built a 3.3 V breadboard Arduino with a efficient
For a recent project I used a a TSL235R light-to-frequency converter that outputs a square-wave signal with a frequency that increases the amount of light hitting the sensor also increases. There are several Arduino packages out there for using the ATmega328 to measure frequency but I decided to write my own code in order to
Update: I’ve made new versions of these warning stickers using white lettering on a red background to conform more completely with local fire and electrical codes. Follow this link to see the updated warning stickers. Click the image at left or any of the images below to be redirected to my CafePress store to purchase
In this lab activity you will examine the properties of pn-junction diodes and use diodes to convert AC signals to DC signals. Introduction to PN-Junction Diodes A diode is a device that only allows current to flow in one direction. For this reason, an ideal diode has a current voltage plot that looks like this.