Turn Your Old Laptop Into a DIY Hideaway Media Center for TV
Jan 25, 2016
Turn Your Old Laptop Into a DIY Hideaway Media Center for TV
Turn Your Old Laptop Into a DIY Hideaway Media Center for TV:
Turn Your Old Laptop Into a DIY Hideaway Media Center for TV
Turn Your Old Laptop Into a DIY Hideaway Media Center for TV
Remote Wi-Fi DHT11 Temperature an Humidity I2C 2 X 16 LCD Display With Two ESP8266 and Visuino
Remote Wi-Fi DHT11 Temperature an Humidity I2C 2 X 16 LCD Display With Two ESP8266 and Visuino:
ESP8266 modules are great low cost stand alone controllers with built in Wi-Fi, and I already made a simple Blink instructable with ESP8266 NodeMCU module.The advantage of the ESP8266 over Arduino and other controllers is the builtin Wi-Fi. In this Instructable I will show you how with the help of V...
By: BoianM
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ESP8266 modules are great low cost stand alone controllers with built in Wi-Fi, and I already made a simple Blink instructable with ESP8266 NodeMCU module.The advantage of the ESP8266 over Arduino and other controllers is the builtin Wi-Fi. In this Instructable I will show you how with the help of V...
By: BoianM
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Arduino As Stand Alone. Burn Bootloader.
Arduino As Stand Alone. Burn Bootloader.:
Sometimes I need quick hint how to create standalone arduino MC, but when I click buttons in wrong order or connect wires in a wrong way, it brings me to frustration and extra time to figure out where is the problem. So here is quick screenshots of step by step bootloader burn and sketch upload.
By: aequanimitas
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Sometimes I need quick hint how to create standalone arduino MC, but when I click buttons in wrong order or connect wires in a wrong way, it brings me to frustration and extra time to figure out where is the problem. So here is quick screenshots of step by step bootloader burn and sketch upload.
By: aequanimitas
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LM35 Temperature Sensor with Datalogging on SD card on Intel Edison
LM35 Temperature Sensor with Datalogging on SD card on Intel Edison:
- Demonstrates the use of an LM35 sensor on Intel Edison to measure temperature over extended periods ranging from several hours to weeks and logs the temperature readings from the sensor to an SD card inserted onboard, all necessary things such as time interval between two consecutive readings, eit...
By: vishal1502
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- Demonstrates the use of an LM35 sensor on Intel Edison to measure temperature over extended periods ranging from several hours to weeks and logs the temperature readings from the sensor to an SD card inserted onboard, all necessary things such as time interval between two consecutive readings, eit...
By: vishal1502
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Ir Remote Camera Shutter for Android Phone
Ir Remote Camera Shutter for Android Phone:
For you're like photo selfie, definitely should have a tool that could make it easier to take foto.there are some tools that can be used which can be purchased at amazon(or other online shop).you can choose between taking the cable connected headset or connected with bluetooth.now i make which can b...
By: agoe3es_one
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For you're like photo selfie, definitely should have a tool that could make it easier to take foto.there are some tools that can be used which can be purchased at amazon(or other online shop).you can choose between taking the cable connected headset or connected with bluetooth.now i make which can b...
By: agoe3es_one
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2 MINUTE ARDUINO LASER ALARM
2 MINUTE ARDUINO LASER ALARM:
WHAT YOU NEEDArduino LaserBreadboardJumper wiresLED10K Resistor CONNECTIONS First connect you resistor to the photo resistor and then that end will go to the - row in the board then the photo resistor will go to A0 on the arduino and the other end to 5V and the LED simply goes to pin 13 on the a...
By: Jacks how2s
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WHAT YOU NEEDArduino LaserBreadboardJumper wiresLED10K Resistor CONNECTIONS First connect you resistor to the photo resistor and then that end will go to the - row in the board then the photo resistor will go to A0 on the arduino and the other end to 5V and the LED simply goes to pin 13 on the a...
By: Jacks how2s
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Burning an Arduino bootloader to a new ATMEGA328-AU chip #Arduino
Burning an Arduino bootloader to a new ATMEGA328-AU chip #Arduino:
Thanks to Lalindra for sending in this video! Lalindra writes:
Thanks to Lalindra for sending in this video! Lalindra writes:
Just wanted to share a video that I created. Its on how to burn an Arduino bootloader to a new ATMEGA328-AU chip.See more
Jan 24, 2016
Make a workbench fan from an old microwave oven exhaust fan
Make a workbench fan from an old microwave oven exhaust fan:
I always like to salvage usable parts off of things before I recycle them. So when replacing a microwave oven, I salvaged the fan and starter capacitor.I found this two-speed fan to be quite-powerful (300-400 cfm), and directional. Which gave me the idea of making a fan for my workbench that blew ac...
By: psdhowto
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I always like to salvage usable parts off of things before I recycle them. So when replacing a microwave oven, I salvaged the fan and starter capacitor.I found this two-speed fan to be quite-powerful (300-400 cfm), and directional. Which gave me the idea of making a fan for my workbench that blew ac...
By: psdhowto
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How to Build a Wankel Engine (and How It Works)
How to Build a Wankel Engine (and How It Works):
This is for my AP Physics C class.Wankel Rotary engines are quite ingenious. They arose as an attempt to challenge piston-based engines, and proved that sufficient power can be created without the reciprocating motion of pistons. They rely on very few moving parts to produce a power output and manag...
By: stoyanAPC
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This is for my AP Physics C class.Wankel Rotary engines are quite ingenious. They arose as an attempt to challenge piston-based engines, and proved that sufficient power can be created without the reciprocating motion of pistons. They rely on very few moving parts to produce a power output and manag...
By: stoyanAPC
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Simple small QRO for HF
Simple small QRO for HF:
Marko Pavlin has been working on a HF amplifier project:
Marko Pavlin has been working on a HF amplifier project:
I followed the ARRL Homberw challenge 50 watt aplifier entry. It is low cost, simple HF linear amplifier designed and built by the author as an entry in the ARRL’s 2009 Homebrew Challenge contest. The requirements of the amplifier were: 40 meter band 50 watt output amplifier intended for use with a QRP transmitter as driver (less than 5W), constructed at a total material cost of not over $125.00.Project info at Mare & Gal Electronics homepage.
I redesigned author original design an put it on the double sided PCB with additional output banpass filters. I started with first prototype. It worked quite well for short periods. Main disadvantage was lack of heat sink. Then I soldered second prototype with proper transistor cooling. I also wound correct transformer using binocular ferrite cores
Next step was designing PCB. I started with the schematic diagram based on original project
ESP8266 mains energy monitor
ESP8266 mains energy monitor:
Brian Dorey has designed a mains energy monitor based on ESP8266 that have sensors for the mains current, electric meter and gas meter.
The post ESP8266 mains energy monitor appeared first on Electronics-Lab.
Brian Dorey has designed a mains energy monitor based on ESP8266 that have sensors for the mains current, electric meter and gas meter.
As the new solar logger did not have this functionality we decided to design a new data-logger that would measure not only the mains current usage but also keep track of the electric meter and gas meter so we can easily see how much energy we are using in the house.ESP8266 mains energy monitor – [Link]
The new mains energy monitor was designed to be a standalone box that would be powered from the mains and have sensors for the mains current, electric meter and gas meter. As we didn’t want to run any more wires around the house we also decided to make it wireless connecting to our network over Wi-Fi.
The post ESP8266 mains energy monitor appeared first on Electronics-Lab.
Battery Powered Frequency Meter (0 to 20kHz)
Battery Powered Frequency Meter (0 to 20kHz):
The circuit is a simple digital frequency meter that is made of a frequency-to-voltage converter and an analog-to-digital display converter that can be operatedfrom a single 9-volt battery. The TC7126 ADC generates the voltage required by the TC9400 FVC with internal regulators. The TC7126 is designed to directly drive a 3-1/2 digit, non-multiplexed LCD display so no digital conversion is required.
The input circuit is made up of a current limiting resistor (33kΩ), a DC blocking capacitor (0.01µF), a clamping diode (1N914), and a biasing resistor (1MΩ). The diode acts as a soft clamp to prevent negative going transitions from latching the comparator input and the 33kΩ resistor limits the current during the positive transitions. The gain (VOUT vs. FREQIN) of the TC9400 is determined by the charge-balance capacitor and the integrator feedback resistor (620kΩ) that has been selected for an output of approximately +2V (referenced to ANALOG COMMON) with frequency input of 20kHz. The bias resistor (12kΩ) determined the input threshold of the comparator and has been selected for an input sensitivity range of 250mV to 10V peak-to-peak of a sine or square wave on the input of the FVC.
The TC7126 will have a maximum positive input of about 2V since the input is referenced to ANALOG COMMON that is only 3V below V+. The internal voltage swing of the integrator does not have the same limitation because a positive input results in a negative swing of the integration. A fully charged battery will give a range of about 6V. The integration components (1MΩ and 0.047µF) at pins VBUFF and VIN are selected, in conjunction with the oscillator frequency to have an integrator ramp amplitude of about –3V with a 2V input from the TC9400. The oscillator is set up to run at 48kHz (150kΩ and 50pF) for maximum rejection of stray power-line pickup. This will result in the TC7126 running at three conversions per second.
Battery Powered Frequency Meter (0 to 20kHz) – [Link]
The post Battery Powered Frequency Meter (0 to 20kHz) appeared first on Electronics-Lab.
The circuit is a simple digital frequency meter that is made of a frequency-to-voltage converter and an analog-to-digital display converter that can be operatedfrom a single 9-volt battery. The TC7126 ADC generates the voltage required by the TC9400 FVC with internal regulators. The TC7126 is designed to directly drive a 3-1/2 digit, non-multiplexed LCD display so no digital conversion is required.
The input circuit is made up of a current limiting resistor (33kΩ), a DC blocking capacitor (0.01µF), a clamping diode (1N914), and a biasing resistor (1MΩ). The diode acts as a soft clamp to prevent negative going transitions from latching the comparator input and the 33kΩ resistor limits the current during the positive transitions. The gain (VOUT vs. FREQIN) of the TC9400 is determined by the charge-balance capacitor and the integrator feedback resistor (620kΩ) that has been selected for an output of approximately +2V (referenced to ANALOG COMMON) with frequency input of 20kHz. The bias resistor (12kΩ) determined the input threshold of the comparator and has been selected for an input sensitivity range of 250mV to 10V peak-to-peak of a sine or square wave on the input of the FVC.
The TC7126 will have a maximum positive input of about 2V since the input is referenced to ANALOG COMMON that is only 3V below V+. The internal voltage swing of the integrator does not have the same limitation because a positive input results in a negative swing of the integration. A fully charged battery will give a range of about 6V. The integration components (1MΩ and 0.047µF) at pins VBUFF and VIN are selected, in conjunction with the oscillator frequency to have an integrator ramp amplitude of about –3V with a 2V input from the TC9400. The oscillator is set up to run at 48kHz (150kΩ and 50pF) for maximum rejection of stray power-line pickup. This will result in the TC7126 running at three conversions per second.
Battery Powered Frequency Meter (0 to 20kHz) – [Link]
The post Battery Powered Frequency Meter (0 to 20kHz) appeared first on Electronics-Lab.
555 Based DC Motor Speed Controller
555 Based DC Motor Speed Controller:
555 DC Motor Speed Controller project will control the speed of a DC motor connected to it. This project is built using the popular 555 timer IC.
Specifications
The post 555 Based DC Motor Speed Controller appeared first on Electronics-Lab.
555 DC Motor Speed Controller project will control the speed of a DC motor connected to it. This project is built using the popular 555 timer IC.
Specifications
- Power supply input 5-12V DC
- Motor Load Up to 1 to 2Amps
- Onboard preset to vary Duty Cycle from 10% to 95% @ 120 Hz
- Ideal for mini drill and robotics application
- Transistor based output drive with heat-sink
- Diode protection for motor surge
- Power-On LED indicator
- Screw terminal connector for easy power supply input and output-Motor connection
- Four mounting holes of 3.2 mm each
- PCB dimensions 47 mm x 56 mm
The post 555 Based DC Motor Speed Controller appeared first on Electronics-Lab.
Simple Arduino SD-Card GPS/NMEA Datalogger
Simple Arduino SD-Card GPS/NMEA Datalogger:
KF5OBS @ jaunty-electronics.com shows us how to build a minimalistic GPS datalogger. The GPS logger is based on the Arduino platform and stores raw NMEA sentences from pretty much any GPS module to a SD card.
The post Simple Arduino SD-Card GPS/NMEA Datalogger appeared first on Electronics-Lab.
KF5OBS @ jaunty-electronics.com shows us how to build a minimalistic GPS datalogger. The GPS logger is based on the Arduino platform and stores raw NMEA sentences from pretty much any GPS module to a SD card.
For a project I needed to log GPS information. I had various GPS modules and plenty of Arduinos laying around the lab. At first I intended for the Arduino to capture data from the GPS module, process it and then store it onto a SD card. However, I discarded that idea in favor of more flexibility and now use the arduino merely as pass-thru device for the raw GPS data.Simple Arduino SD-Card GPS/NMEA Datalogger – [Link]
The post Simple Arduino SD-Card GPS/NMEA Datalogger appeared first on Electronics-Lab.
Up Your Tiny House Game with Stone Age Hacks
Up Your Tiny House Game with Stone Age Hacks:
Bare feet, bare hands, and bare chest – if it weren’t for the cargo shorts and the brief sound of a plane overhead, we’d swear the video below was footage that slipped through a time warp. No Arduinos, no CNC or 3D anything, but if you doubt that our Stone Age ancestors were hackers, watch what [PrimitiveTechnology] goes through while building a tile-roofed hut with no modern tools.
The first thing we’ll point out is that [PrimitiveTechnology] is not attempting to be (pre-)historically accurate. He borrows technology from different epochs in human history for his build – tiled roofs didn’t show up until about 5,000 years ago, by which time his stone celt axe would have been obsolete. But the point of the primitive technology hobby is to build something without using any modern technology. If you need a fire, you use a fire bow; if you need an axe, shape a rock. And his 102 day build log details every step of the way. It’s fascinating to watch logs, mud, saplings, rocks and clay come together into a surprisingly cozy structure. Especially awesome if a bit anachronistic is the underfloor central heating system, which could turn the hut into a lovely sauna.
Primitive technology looks like a fascinating hobby with a lot to teach us about how we got to now. But if you’re not into grubbing in the mud, you could always 3D print a clay hut. We’re not sure building an enormous delta-bot is any easier, though.
https://www.youtube.com/watch?v=P73REgj-3UE
Thanks to [Rockyd] for the tip.
Bare feet, bare hands, and bare chest – if it weren’t for the cargo shorts and the brief sound of a plane overhead, we’d swear the video below was footage that slipped through a time warp. No Arduinos, no CNC or 3D anything, but if you doubt that our Stone Age ancestors were hackers, watch what [PrimitiveTechnology] goes through while building a tile-roofed hut with no modern tools.
The first thing we’ll point out is that [PrimitiveTechnology] is not attempting to be (pre-)historically accurate. He borrows technology from different epochs in human history for his build – tiled roofs didn’t show up until about 5,000 years ago, by which time his stone celt axe would have been obsolete. But the point of the primitive technology hobby is to build something without using any modern technology. If you need a fire, you use a fire bow; if you need an axe, shape a rock. And his 102 day build log details every step of the way. It’s fascinating to watch logs, mud, saplings, rocks and clay come together into a surprisingly cozy structure. Especially awesome if a bit anachronistic is the underfloor central heating system, which could turn the hut into a lovely sauna.
Primitive technology looks like a fascinating hobby with a lot to teach us about how we got to now. But if you’re not into grubbing in the mud, you could always 3D print a clay hut. We’re not sure building an enormous delta-bot is any easier, though.
https://www.youtube.com/watch?v=P73REgj-3UE
Thanks to [Rockyd] for the tip.
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