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vSphere ESXi backup strategies for lowering power consumption
For my home development servers I use the vSphere ESXi 6.5 hypervisor.At home I do not need all the virtual machines on that server to be online 24/24 365/365, so this server is not always powered on....
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MQ gas sensor correlation function against temperature and humidity
We have taken a look at the MQ sersor in this post here:http://davidegironi.blogspot.com/2017/05/mq-gas-sensor-correlation-function.htmlAs I said those sensor are electro-chemical. Accuracy of those...
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MQ gas sensor correlation coefficients
I've have talk about MQ sensors here:http://davidegironi.blogspot.it/2017/05/mq-gas-sensor-correlation-function.htmlIn the post linked above I've discuss a method to correlate the sensor resistance to...
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OpenWrt Access Point & Routed AP with Guest WiFi on AGPF modem/router
The Pirelli Alice Gate VoIP 2 Plus, also known as agpf, is a ADSL modem router with WiFi and Voip capabilities.The main chip is the BCM6358KFBG, they support OpenWrt.OpenWrt is a linux distribution for...
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OpenWrt Guest Routed AP using VLAN with unmanaged switch
I've previously post about a Routed AP for Guest WiFi isolation based on OpenWrt, you can find that post here: http://davidegironi.blogspot.it/2017/09/openwrt-access-point-routed-ap-as-guest.htmlThis...
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ST Audio DSP2000 C-Port on Linux using JACK and wineasio
subtitle:Make revive the ST Audio DSP2000 C-Post audio board on LinuxI've a DSP2000 C-Post Audio System made by ST Audio (http://www.st-audio.de), I'm using it in my small recording room for...
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Small office backup and datastore environment
This post is about my small office datastore and backup enviroment, because "Shit Happens! It's the way you handle it that matters" (cit. Pete Vinken).My main data store is a pretty old NAS, a Zyxel...
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esp8266/Arduino NTC library
A thermistor is a type of negative coefficient resistor whose resistance is dependent on temperature, more so than in standard resistors. The resistance of a NTC Negative Temperature Coefficient...
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esp8266/Arduino 74HC4051 library
The 74HC4051 is a high-speed Si-gate CMOS device and is pin compatible with Low-power Schottky TTL (LSTTL).The 74HC4051 IC can be used to expand the single ADC input port of the ESC8266, to 8 ports.The...
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An AVR ATmega R/C control signal reader - Method/02
The Radio Control (R/C or RC) is the method of controlling remote devices using radio frequencies.Most of the time the RC signal uses RC servo signals.Servo signal is a square PWM signal, usually with...
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A web configurable ThingSpeak logger, build on AVR ATmega328
ThingSpeak is an open source Internet of Things (IoT) application and API to store and retrieve data from things. It is an on-line database service allowing developers to connect sensor-derived data...
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UV Sensor ML8511 AVR Atmega library
Ultraviolet (UV) is an electromagnetic radiation with a wavelength from 10 nm to 400 nm.The ML8511 is an ultraviolet sensor that output an analog signal correlated to the amount of UV light detected....
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TriNegistor, a Triple Negistor oscillator noise box
-- ref. 2010This box I present here is a triple negistor oscillator. This is basically a noise box I use to make sounds.The orignal schematics cames from Charlie Barth trinegistor, you can find it here...
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DentneD: an open source Dental Practice Management Software
DentneD is a Dental Practice Management Software.It's a complete open source solution to manage you clinic.You can trace your patient, treatments, scheduling appointments, doing reports, and billing...
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4pin hall sensor adapter board
Hall Sensor are pretty common components. Most of the time one will find 3 pin Hall Sensor. But there are time that one can find a 4 pin hall sensor.Those kind of sensor is called dual-channel.They...
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MCP4725 DAC AVR ATmega library
In this post I present an AVR implementation for the MCP4725 DAC.The MCP4725 DAC is a pretty common and cheap single channel 12 bit buffered voltage DAC, it also has an onboard EEPROM.To drive this...
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Switch debounce library
Contact bounce (ref. https://en.wikipedia.org/wiki/Switch#Contact_bounce) is a common problem with mechanical switches and relays. Switch and relay contacts are usually made of springy metals. When the...
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An interrupt free quadrature decoder library for rotary incremental encoders
A rotary incremental encoder, also called a shaft encoder, is an electro-mechanical device that converts the angular position or motion of a shaft or axle to analog or digital output signals...
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Debian and OpenMediaVault on Zyxtel NSA310 using Kirkwood U-Boot and Kernel
I've a Zyxtel NSA310 NAS laying around that sometimes does not boot.This was an inspiration for me to try installing Debian on this kind of device.On the NAS central web page you can find a lot of...
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Usa a MCP23017 GPIO port expander with an ATmega
The MCP23017 is a general purpose I/O port expander, it is driven using the I2C interface.Each of the 16 channels can be set independently as an input or as an output pin.This library provides...
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