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Using interrupts for measurements

In the past, the voltage measurements of the ADS1262 were recorded in a polling loop. A polling loop is the simplest form for performing repeated measurements. The loop reads a measurement and then waits for a certain time, e.g. 2… Continue Reading →

Increasing the ADC precision

Besides the missing reliability of the Raspberry Pi, which could be solved by switching the power input to the GPIO pins, there was one point, which disturbed me a lot the last months: The high level of noise at the… Continue Reading →

Reliability by removing under-voltage

During the development of the software, I noticed several times that the raspberry didn’t interact after the ADC program was running for one day.Since the seismometer needs to work many days outside without manual operation at the raspberry, this gave… Continue Reading →

A quantum leap in sensitivity by the ADS1262 or the two faces of the Roman god Janus

The ADS1115 from the last version had 16 bit resolution, which is a little few for a good seismometer. Most commercial seismometers use 24 bit resolution ADCs. Therefore, different ADCs have been looked for with a higher resolution, before much… Continue Reading →

Beta version V0.1 of seismometer based on Raspberry Pi, ADS1115 and SM-24

The beta version V0.1 of the seismometer is based on the Raspberry Pi. The ADC is a ADS1115 analog-to-digital converter with a resolution of 16 bit. The geophon is the SM-24 geophon. This version is still very simple and only… Continue Reading →

Setting up MC, NFS, PostgreSQL server, PASCAL IDE, tools, bus interfaces and overclocking

Now we are going to setup the Raspberry Pi with Midnight Commander (MC), the Network File System (NFS), the powerful PostgreSQL server, a PASCAL IDE, some tools, I²C and SPI. Hereafter, PC means a PC with a LINUX operating system,… Continue Reading →

Preparing the Raspberry Pi for SSD, SSH and RDP

Since of its limitation the ESP32 solution was no longer pursued. Looking for a more powerful alternative, the Raspberry Pi became the first choice, as it was used before in robotic projects. The Raspberry Pi offers many advantages and possibilities:… Continue Reading →

Alpha version of seismometer based on ESP32, ADS1115 and SM-24

The first version of the seismometer is based on the micro controller ESP32. The ADC is a ADS1115 analog-to-digital converter with a resolution of 16 bit. The geophon is a SM-24 geophon from Sensor Nederland B.V.. ESP32 The ESP32 is… Continue Reading →

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