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14 August
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About Temperature Data Loggers

Posted by:ReadyDaq
A data logger is, simply put, an electronic device which records and stores data. There are various ways data devices, or data loggers, tools designed for recording or monitoring processes and different parameters, acquire data. These data loggers have become a revolutionary solution for logging vast amounts of data and are nowadays symbolized by a vast array of devices, from small, handheld ones to complex systems.
11 August
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RS-232 and RS-485 Serial Communication Protocols

The RS232/485 port consecutively sends and receives bytes filled with information one bit at a time. Although the serial method is somewhat slower than parallel communication, which allows the transmission of an entire byte at once, it is far simpler and can be employed over longer distances because power consumption is lower than that of parallel one. As an example, the IEEE 488 standard for parallel communication requires that the cabling between equipment can be no more than 20 meters total, with no more than 2 meters between any two connected devices.

10 August
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Uses for Data Loggers

There are numerous uses for autonomous data loggers, one of which being environmental monitoring: they can be taken to various locations that cannot be accessed easily with bulky temperature monitoring equipment such as mountains, deserts, jungles, mines, caves and other similar places. Data loggers, especially portable ones, can also be used in industrial and scientific surroundings – in factories and laboratories where temperature monitoring is highly wanted.
 
09 August
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About I²C

I²C is a multi-master protocol that uses two signal lines. The two I²C signals are named ‘serial data’ (SDA) and ‘serial clock’ (SCL). There is no need of chip select (servant select) or compromise logic. Basically, any number of servants and any number of masters can be united onto these two signal lines and correspond to each other using a protocol that specifies:
 
7-bits servant addresses: every device united to the bus has got such a unique address;
07 August
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I²C vs SPI - comparison

Bus topology / routing / resources

I²C needs two lines, while SPI officially defines at least four signals or more if more servants are added. Some informal SPI alternatives only need three wires, that is an SCLK, SS and a bi-directional MISO/MOSI line. Nevertheless, this exercise would require one SS line per servant. SPI lacks further work, logic and/or pins if a multi-master engineering must be built on SPI. The singular problem I²C when building a system is a finite machine address space on 7 bits, overwhelmed with the 10-bits enlargement.

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