Bob Johnson completed his DIY Water Level Sensor project. It can sense 4 levels of water, the results are transmitted using some Xbee devices. “The distance from my barn to the house is over 700ft. I used a 2.4Ghz yagi to send the signal to the house. This works great and no outside antenna is required at the receiving end. I have tried this setup at much smaller distances, and
When your RC plane flies out of transmitter range some of them are setup to start a slow bank so that it hopefully flies closer to you and you can reacquire communication. What if that fails and the plane comes crashing back to earth? This Lost Signal RC Alarm & Lost Plane Finder project will help you in this case. When your transmitter is not connected the buzzer will
If you are looking to build a new project, this DIY AC Watt Meter would make for a useful device that can be added to your test bench. “The microcontroller of the wattmeter is PIC18F252. Basically it reads the voltage and the current and calculates the RMS voltage, the RMS current and the average power. Then it interfaces with the LCD and shows all these values. It has a
Apple keeps lots of design details secret. You can see some of the previous charging mysteries revealed here. The current Apple devices use the new Lightning Connector. The details behind this connector was unknown until recently.  Here is some info on the chip that is inside. Ramtin Amin has recently taken reverse engineering to the next level by first making a breakout board. It was made to inspect the main WLCSP
 The prize this week is a ESP8266 Serial WIFI Wireless Transceiver Module so you can add WIFI to your next project. This contest will run for one week (Feb 14- 20, 2015). Ending time is based on central standard time. To enter, identify the item above and what it can be used for. Please do not give the answer in the comments. Send an email to contest @
 If you want your valentine to work for their candy hearts why not build them a slot machine to let them win them. I have seen little bits before but this is the most complex device I have seen built! “Try your luck with the littleBits Slot Machine and win a handful of candy hearts for your special someone. This slot machine operates just like the real thing.
This video shows us how to build something that should be impossible. When built you will have something that will be an interesting conversation piece. Guess how it is made before watching the entire video.
