All Questions
10
questions
0
votes
2
answers
54
views
Connecting Two 24VDC Power Supplies
I have a system that has multiple different gas detection sensors and we are datalogging our readings onto a PLC. To power our sensors we are using a 10 A power supply and have everything grounded ...
-2
votes
2
answers
60
views
Missing and insufficient data read from embedded BMP180 pressure sensor in motion [closed]
We're building an avionic system which will fly onboard on our rocket. And we have embedded BMP180 Pressure Sensor on our avionic system and we want to get smooth data when it is moving. Our BMP180 ...
2
votes
1
answer
52
views
MQ-4 sensitivity characteristics - raw data
I need to convert Rs/Ro ratios of my MQ-4 sensor to PPM. For that I found the sensitivity plot in the datasheet (https://www.sparkfun.com/datasheets/Sensors/Biometric/MQ-4.pdf). However that is a pdf ...
- 21
0
votes
2
answers
242
views
How to convert sensor signal to temperature from the data available from the datasheet?
I have a Pyrometer datasheet showing signal percentage (0 to 100%) with the corresponding respective temperatures (from 0 to 200 °C) and current values (from 0 to 20 mA) in the whole measuring range.
...
3
votes
2
answers
181
views
What serial communication interface would work best for data logging when the nearest sensor and main MCU are (at least) 1 meter apart?
I would like to setup a "sensor array" which has 4 sensors attached to it. Each sensor is expected to send data at rates of up to 8 Hz. The data would be shipped off to an MCU that is around 1-2 ...
-1
votes
1
answer
63
views
How to send data from simple digital device to an Android application wirelessly?
I am trying to find a way to send measurements from a digital device (as the blood pressure device) to a mobile application that can analyse these data ..... How to send these measurements wireless ...
1
vote
1
answer
516
views
Is there a common message protocol for sensor data on top of MQTT-SN?
I want to communicate various sensor data in a network of sensors.
I found MQTT and MQTT-SN as suitable protocols for that. The latter being better suited for sensor networks with support for ...
- 51
0
votes
1
answer
66
views
Sensor Performance Analysis
I've recently built a temperature sensor and have been testing it against a reference thermometer in several different scenarios/environments/temperature ranges.
My question is, how do I analyse my ...
- 21
-7
votes
2
answers
3k
views
MSP430 - ADC data to SD card [closed]
My question is to establish a connection between sensors and MSP430 with the ADC pins. Then taking those data to store it on an SD card. The SD card is in SPI mode.
I want to graph these data in ...
3
votes
4
answers
379
views
Bit/data stream unknown. How to figure out?
I have taken apart a digital weight scale and on the circuit are two pins labelled 'test'. When connecting this to the soundcard of my PC I can see it is a digital signal (high/lows), but I don't know ...
- 339