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Another smart wifi-enabled thermostat using ESP8266 and a nice user interface using ILI9341 LCD display along a rotary Encoder and pushbutton. Temperature and humidity measurements are made using DHT22 sensor.
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DIY audio synthesizers are not new. We have seen before some really cool synthesizer builds using Raspberry Pi and NXP LPC1114FN28 ARM. Here comes TinyTS, an Arduino-based credit card sized (100x65mm) synthesizer. It is a fully open-sourced design with a 1-octave capacitive touch keyboard. The synthesizer parameter knobs includes: DCO: Coarse pitch and Double. The CV out follows the keyboard and coarse pitch. DCF: Filter peak and ENVmod. ENV: Attack and Release affecting amplitude. More details can be found here. Here’s a demo video showing the TinyTS in action.
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Earlier this week, we saw David Johnson-Davies’ minimalist ATtiny85 wrist watch that displays time using 12 LEDs arranged in a circle like a watch dial. I found another interesting LED-based wrist watch design shared by MACROFAB. It is a low cost watch based on Microchip PIC16F527 and it displays time in binary format. The PIC microcontroller runs in low-power crystal mode using a 32.768 KHz external crystal, that helps to achieve an accurate 1Hz signal required for timekeeping. The Macro_Watch has 11 LEDs. Four LEDs for the Hour (H1 – H4), Six LEDs for the Minute (M1 – M6), and a single Seconds LED for timing
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Kids love Etch-a-sketch drawing boards. Rob Cai shares on this Instructables post how he has built a Etch-a-sketch like drawing tool using Arduino Uno and a VGA monitor. Besides an Arduino board, this project only requires two potentiometers, two tact switches, and four resistors. The VGA signal is generated in software using the VGAX Arduino library contributed by smaffer. I used Arduino IDE 1.6.4. and the VGAx library done by Smaffer and publish on GitHub here. This library allows to use four color with a resolution of 120 x 60 pixels. One button is to clear the screen, the second to choose the color.
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This Arduino-powered 8-channel data logger built by smooth_jamie can measure AC currents drawn by home appliances or other equipments, and record the data on an SD card with timestamp for future use. The project uses the HMCT103C 5A/5MA current transformer for sensing the current flowing through a conducting wire. The current transformer output signal is very low, and therefore, an OpAmp-based circuit is built for instrumentation. The analog output voltages corresponding to the eight-channel current logger are digitized using an external lADS1115 16-bit A/D converter IC. Hi Everyone, welcome to my first instructable! By day I am a test engineer for a company that supplies industrial heating equipment,
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