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Johann Stornig
Johann Stornig 13 hours ago
Question: could the circuit diagram also be published as an EAGLE file or similar? Then it would be easier to design a customized circuit board
Remake Elektor weather station
kyros
kyros 1 day ago
Specifications 1. Microcontroller ATmega328 2. 3-AXIS Digital Accelerometer ADXL335 3. Lipo Battery with Charging Board Module 4. 433MHz Wireless Remote Control Transmitter 5. Compact Power Module - voltage input (AC: 90 ~ 264V) the system is based on the ADXL335 accelerometer that has a detection range of ±3 g. It can measure the static acceleration due to gravity , as well as dynamic acceleration resulting from motion, shock, or vibration. A metal ring mounted on the sensor ADXL335 contains perimeter loose steel spheres and magnifies the weak vibrations of the building creating a more intense shock to the sensor the appliance must be plugged in in standby mode in a room outlet the LED will be green (standby mode) Ability to enable / disable device with Power switch the vibration of the building will turn on the device and it will sound alarm the LED will turn red will also activate wireless receivers alarms in other rooms at frequency 433Mhz when the building stops vibrating the audible alarm will stop the LED will turn yellow and the device will return to standby mode the LED will remain yellow (as a memory) reminding that there has been a vibration if we want to restore the entire system to its original state we ,press the reset button details and code https://sites.google.com/view/electrodevelo/home-page/education-projects/earthquake-alarm  
Earthquake Alarm System
BreedJ
BreedJ 1 day ago
Here is a similar project. It was based on this project. The costs are about the same. It uses a 8318.http://www.rc-cam.com/forum/index.php?/topic/4139-diy-rf-power-vswr-meter-low-cost/
RF Power Meter with 1MHz-10GHz bandwidth and 55dB dynamic range (160193)
yong
yong 2 days ago
Or With 8318
RF Power Meter with 1MHz-10GHz bandwidth and 55dB dynamic range (160193)
yong
yong 2 days ago
I'm interested to buy repica of the RF power meter with the IC AD8317 .i would like to know the price of the project and if there is a similar project with upgraded features
RF Power Meter with 1MHz-10GHz bandwidth and 55dB dynamic range (160193)