PCF8591 is AD / DA converter 8 bits with 4 analog inputs using the I2C interface. This chip has been busy replacing the currently used ADC / DAC as standard 0808.0809, MC1408 and 0804. DT51 I2C Adda is Analog Input Output Add-on board for the DT51 using I2C-bus technology, where the main IC used is [...]
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Temperature and Humidity Sensor
SHT11/75 Sensor Relative Humidity dan Temperatur SHT11 is a digital sensor for temperature as well as the world’s first humidity which is claimed by the manufacturer, Sensirion Corp.. Has a measurement range from 0-100% RH, and RH absolute accuracy + / – 3% RH. While the temperature measurement accuracy of + / – 0.4 ° [...]
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Humidity Sensor : HS 12P/15P
Relative humidity sensor is HS12P/HS15P (Relative Humidity) with operating temperature of 0-50 ° C. HS12P chosen as the sensor for this type of quick response, while HS15P for type waterproof sensor. HS12P operate in humidity from 20 to 90% RH (no condensing) while HS15P 20 -100% RH. Ideally given AC voltage 1V rms and 0.3 [...]
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DS 1821 Programmable Digital Termostat
DS1821 functions as a sensor thermostat trip points that can be programmed or as a temperature sensor with a 1-wire digital interface. thermostat trip-point is stored in nonvolatile memory, so the DS1821 can be programmed to run as a standalone. DS1821 has a temperature range of-55 ° C to +125 ° C and 1 ° [...]
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DS1626/1726 3-Wire Digital Thermometer
DS1626 and DS1726 is a digital thermometer / thermostat is able to read the temperature and the thermostat in the range -55 ° C to +125 ° C. DS1626 has ± 0.5 ° C accuracy from 0 ° C to +70 ° C and the DS1726 has ± 1 ° C accuracy from -10 ° [...]
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temperature sensor
LM 35 temperature sensor is the most widely used for practice, because besides the price is cheap, its quite good linearity. LM35 does not require external calibration which provides accuracy of ± ¼ ° C at room temperature and ± ¾ ° C in the range -55 to +150 ° C. LM35 is intended to [...]
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Various Kinds of Sensors
Sensors are devices or electronic components used to transform physical quantities into electrical quantities that can be analyzed by using electrical circuits. Types of sensors can be divided roughly into 2 types: 1. Sensor Physics 2. Chemical Sensor Physical sensors are sensors that detect a quantity based on the laws of physics. Are included into [...]
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Create a realtime timer on ATMega8535
To create a realtime timer, realtime microcontroller is not required (RTC). You only need a crystal and a timer prescale settings. for example, if used for 8MHz crystal, then choose the timer prescale of 8. Prescale is a divisor which will be conditional on crystal beats as needed. timer frequency = frequency of crystal / [...]
