https://www.robolabor.ee/homelab/ 2026-04-16T03:54:06+00:00 https://www.robolabor.ee/homelab/ https://www.robolabor.ee/homelab/lib/tpl/arctic/images/favicon.ico text/html 2020-07-20T12:00:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.robolabor.ee/homelab/en/examples/sensor/1-wire?rev=1595235600&do=diff 1-wire temperature sensor The necessary knowledge: [HW] Sensors Module, [HW] User Interface Module, [HW] Controller module, [LIB] Pins, [LIB] Graphic LCD, [LIB] Sensors Theory Dallas Semiconductor Corp. worked out a communication bus system for simple sensors and other equipments called 1-wire protocol. This protocol provides low-speed data exchange, signaling and power over single signal wire. It is possible to connect up to 75 devices to one bus, forming MicroLan networks. MicroLan networks… text/html 2020-07-20T12:00:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.robolabor.ee/homelab/en/examples/sensor/accelerometer?rev=1595235600&do=diff Accelerometer Vajalikud teadmised: [HW] Kasutajaliidese moodul, [HW] Kombomoodul, [AVR] Analoog-digitaalmuundur, [LIB] Analoog-digitaalmuundur, [LIB] Graafiline LCD Teooria Kiirendusandurit kasutatakse peamiselt kiiruste muutuste mõõtmiseks. Samuti saab kiirendusanduriga mõõta anduri nurka maapinna suhtes. Kiirendusandurid on konstrueeritud ja valmistatud mikroelektromehaanika tehnoloogial (inglise keeles text/html 2020-07-20T12:00:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.robolabor.ee/homelab/en/examples/sensor/color?rev=1595235600&do=diff Color sensor Necessary knowledge: [HW] Sensors Module, [HW] User Interface Module, [AVR] Analog-to-digital Converter, [LIB] Analog to Digital Converter, [LIB] Graphic LCD, [LIB] Sensors Theory The color sensor detects the color of the surface, usually in the RGB scale. Color is the result of interaction between a light source, an object and an observer. In case of reflected light, light falling on an object will be reflected or absorbed depending on surface characteristics, such as reflectan… text/html 2026-02-19T11:31:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.robolabor.ee/homelab/en/examples/sensor/encoder?rev=1771493460&do=diff Encoder Required knowledge: [HW] Kasutajaliidese moodul, [HW] Kombomoodul, [LIB] Kooder, [LIB] Graafiline LCD, [AVR] Loendurid/Taimerid, [AVR] Katkestused Theory An encoder is an electro-mechanical device that converts shaft rotation angle or angular velocity into an analog signal or a digital code. There are also linear encoders, which differ from rotary encoders in that their movement is along a straight line. Otherwise the operating principle is similar. text/html 2020-07-20T12:00:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.robolabor.ee/homelab/en/examples/sensor/force?rev=1595235600&do=diff Force sensor Necessary knowledge: [HW] Sensors Module, [HW] User Interface Module, [AVR] Analog-to-digital Converter, [LIB] Analog to Digital Converter, [LIB] Graphic LCD, [LIB] Sensors Theory FSR (force-sensing resistor) sensor allow you to detect physical pressure, squeezing and weight. FSR is basically a resistor that changes its resistive value (in ohms Ω) depending on how much it’s pressed. These sensors are fairly low cost and easy to use but they're rarely accurate. They also vary som… text/html 2020-07-20T12:00:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.robolabor.ee/homelab/en/examples/sensor/humidity?rev=1595235600&do=diff Combined humidity-temperature sensor Vajalikud teadmised: [HW] Kasutajaliidese moodul, [HW] Kombomoodul, [LIB] Graafiline LCD, [LIB] Andurid Teooria Temperatuuri ja niiskuse mõõtmiseks on olemas väga lai valik andureid, millest osa on ka kombineeritud andurid, mis väljastavad nii temperatuuri, kui ka niiskuse. Hinna poolest väga soodsad andurid on DHTxx seeria andurid, mille täpsus pole küll väga suur, kuid täiesti piisav tavakasutajale. Temperatuuriandureid toodetakse erineval tehnoloogia… text/html 2020-07-20T12:00:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.robolabor.ee/homelab/en/examples/sensor/ir_distance?rev=1595235600&do=diff Infrared distance sensor Necessary knowledge: [HW] User Interface Module, [AVR] Analog-to-digital Converter, [LIB] Analog to Digital Converter, [LIB] Graphic LCD, [LIB] Sensors Theory For measuring the distance to an object there are optical sensors using triangulation measuring method. Company “Sharp” produces most common infra-red (IR) wavelength using distance sensors which have analogue voltage output. The sensors made by “Sharp” have IR LED equipped with lens, which emits narrow ligh… text/html 2020-07-20T12:00:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.robolabor.ee/homelab/en/examples/sensor/ir_passive?rev=1595235600&do=diff Passive infrared sensor (PIR) Necessary knowledge: [HW] User Interface Module, [HW] Combo module, [AVR] Digital Inputs/Outputs, [LIB] Pins Theory Passive infrared sensor measures infrared (IR) radiation from objects in it's field of view. All objects emit some low level radiation. The hotter something is the more radiation is emitted. Human eye is not capable to see IR radiation, but it's possible to use special cameras and sensors to detect it. The sensor is called passive because it do… text/html 2020-07-20T12:00:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.robolabor.ee/homelab/en/examples/sensor/lidar?rev=1595235600&do=diff Lidar Necessary knowledge: [HW] Communication Module, [HW] User Interface Module, [LIB] Serial Interface, [LIB] Graphic LCD, [LIB] Sensors Theory LIDAR (Light Detection and Ranging) is an optical remote sensing system which can measure the distance of a target by illuminating it with light. LIDAR technology is being used in Robotics for the perception of the environment as well as object classification. The ability of LIDAR technology to provide 2D elevation maps of the terrain, high precisi… text/html 2020-07-20T12:00:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.robolabor.ee/homelab/en/examples/sensor/mic?rev=1595235600&do=diff Microphone Necessary knowledge: [HW] User Interface Module, [AVR] Digitaal-analoogmuundur, Analoog-digitaalmuundur [LIB] Analog to Digital Converter, [LIB] Graphic LCD, [LIB] Sensors Theory Practice // Homelab microphone example // Microphone sound level graph is shown on LCD and when sound level exceeds threshold an led lights up. #include <stdio.h> #include <homelab/adc.h> #include <homelab/delay.h> #include <homelab/module/sensors.h> #include <homelab/module/lcd_gfx.h> #define ADC_CHA… text/html 2020-07-20T12:00:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.robolabor.ee/homelab/en/examples/sensor/photoresistor?rev=1595235600&do=diff Photoresistor Necessary knowledge: [HW] User Interface Module, [ELC] Voltage Divider, [AVR] Analog-to-digital Converter, [LIB] Analog to Digital Converter, [LIB] Graphic LCD, [LIB] Sensors Theory A photoresistor is a sensor which electrical resistance is altered depending on the light intensity falling on it. The more intense is the light the more free carriers are formed and therefore the lower gets the resistance of the element. Two exterior metal contacts of the photoresistor are reach… text/html 2020-07-20T12:00:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.robolabor.ee/homelab/en/examples/sensor/photoresistor2?rev=1595235600&do=diff Photoresistor Necessary knowledge: [HW] Sensors Module, [HW] User Interface Module, [ELC] Voltage Divider, [AVR] Analog-to-digital Converter, [LIB] Analog to Digital Converter, [LIB] Graphic LCD, [PRT] IDE Eclipse Theory A photoresistor is a sensor which electrical resistance is altered depending on the light intensity falling on it. The more intense is the light the more free carriers are formed and therefore the lower gets the resistance of the element. Two exterior metal contacts of the ph… text/html 2020-07-20T12:00:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.robolabor.ee/homelab/en/examples/sensor/potentiometer?rev=1595235600&do=diff Potentiometer Necessary knowledge: [HW] User Interface Module, [ELC] Voltage Divider, [AVR] Analog-to-digital Converter, [LIB] Analog to Digital Converter, [LIB] 7-segment LED Display Theory Potentiometer is a three terminal resistor, witch has fixed resistance between its two side contacts and variable resistance between side and middle contact. In principle a potentiometer is a attenuator (voltage divider), where resistance is formed between side contacts and middle contact. text/html 2020-07-20T12:00:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.robolabor.ee/homelab/en/examples/sensor/thermistor?rev=1595235600&do=diff Thermistor Necessary knowledge: [HW] User Interface Module, [ELC] Voltage Divider, [AVR] Analog-to-digital Converter, [LIB] Analog to Digital Converter, [LIB] Graphic LCD, [LIB] Sensors Theory A thermistor is a type of resistor which resistance varies with temperature. There are two types of thermistors: positive temperature coefficient of resistance and negative temperature coefficient of resistance. The resistance of thermistors with positive temperature coefficient of resistance is inc… text/html 2020-07-20T12:00:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.robolabor.ee/homelab/en/examples/sensor/ultrasonic_distance_srf04?rev=1595235600&do=diff Ultrasonic distance sensor Necessary knowledge: [HW] Controller module, [HW] User Interface Module, [AVR] Counters/Timers, [LIB] Timers, [LIB] Graphic LCD, [LIB] Sensors Theory Ultrasonic distance sensor determines the distance to an object by measuring the time taken by the sound to reflect back from that object. The frequency of the sound is somewhere in the range of ultrasound, this ensures more concentrated direction of the sound wave because sound at higher frequency dissipates less in t… text/html 2020-07-20T12:00:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.robolabor.ee/homelab/en/examples/sensor/ultrasonic_distance?rev=1595235600&do=diff Ultrasonic distance sensor Necessary knowledge: [HW] User Interface Module, [AVR] Counters/Timers, [LIB] Timers, [LIB] Graphic LCD, [LIB] Sensors Theory Ultrasonic distance sensor determines the distance to an object by measuring the time taken by the sound to reflect back from that object. The frequency of the sound is somewhere in the range of ultrasound, this ensures more concentrated direction of the sound wave because sound at higher frequency dissipates less in the environment. A …