230 VAC Timer

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Classic AC 230 V Timer project can be used in all application requiring a timer of up-to 3 Minutes to operate or control any AC mains load of up-to 200 Watts. This project is based on the Classic 555 Timer IC, triggering a TRIAC. Input and Output is Optically Isolated.

Specifications 

  • Supply input 12 VDC
  • Mains supply input 240 VAC or 120 VAC ( Read Note for 120V/230V AC)
  • Output: up-to 200 Watt
  • Optically isolated Input / Output
  • Onboard start and reset tactile switch
  • Timer On LED
  • Preset adjustable and jumper selectable for range
  • Power-On LED indicator
  • Screw terminal connector for easy mains supply input and load connection
  • Four mounting holes of 3.2 mm each
  • PCB dimensions 46 mm x 91 mm

230 VAC Timer – [Link]

RELATED POSTS

Guide to ESP8266 and Tweeting Using ESP8266

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Subhan95 @ instructables.com has written a tutorial on how to use ESP8266 with Arduino and tweet using it.

What can the ESP8266 do?It is limited by your imagination.I have seen projects and tutorials on the internet showing how to fetch a city’s temperature, stock prices,sending and receiving emails ,making phone calls and much much more.I will show in this Instructable how to send a tweet.

Guide to ESP8266 and Tweeting Using ESP8266 – [Link]

PCB Christmas tree

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Well, Christmas may over but we think you may take a look at this well designed PCB Christmas tree and why not consider building it for the next year.

Since I already have an Arduino, and I felt pretty comfortable with it, I decided to use it to control the LEDs. However a full Arduino is way too bulky for such a thing (also too expensive), so I decided to try my luck with something more integrated: a standalone ATMega328P chip directly soldered on the Christmas tree.

PCB Christmas tree – [Link]

Wake-U-Up System

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Zhiyong Hao and Zhuo Chen from Cornell Univercity build A PIC-based Alarm clock system that is different from most alarm clocks known.

This project is aimed to design a ‘Sleep and Wake-up Assistant’. Different from a normal alarm clocks which can only make noise, this alarm clock is designed to wake up a person in a comfortable and effective way by involving sound, light stimulation, motion detection and vibration. The functions of this alarm system are:

Wake-U-Up System – [Link]

Smokerduino – Arduino Smoker Controller

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rjkorn @ instructables.com shows us his Arduino Smoker Controller:

I had made a Sous Vide controller and thought it might work well for my smoker too. All I really had to do was change the sensor form a Dallas 18B20 to a thermocouple. The Dallas sensor tops out at about 250 degrees Fahrenheit. This particular smoker is electric but the controller will work on charcoal fired ones too. You just use the relay to run a fan and motorized damper instead of the heating element.

Smokerduino – Arduino Smoker Controller – [Link]

FLIR MR160 Thermal Imaging & Moisture Meter Review, Teardown & Experiments

The Signal Path Blog published another video reviewing  FLIR MR160 Thermal Imaging & Moisture Meter:

In this episode Shahriar takes a close look at the FLIR MR160 Thermal Imaging and Moisture Meter. Featuring Infrared Guided Measurement (IGM) technology powered by a FLIR Lepton® thermal imaging sensor, MR160 helps you quickly see temperature patterns that point to potential hidden moisture so you know right where to place the meter probe to capture accurate readings.

After an overview of the camera functions a full teardown of the instrument is presented. The FLIR MR160 is based on a single PIC32 processor with built-in capacitance measurement capability. The MR160 is then used to detect a moisture spot on a floor tiling. The presence of moisture is then verified with both the pin-less and pin-based moisture measurement capability of the MR160. Finally, the MR160 is also used to measure temperature variation across a bank of resistors.

FLIR MR160 Thermal Imaging & Moisture Meter Review, Teardown & Experiments – [Link]

Geiger Backpack with Intel Edison

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Geiger Backpack is a device that measures ambient radioactivity and GPS position and saves them on a cloud database using your smartphone as a WiFi hotspot.

Our project is a portable device powered by an Intel Edison and equipped with a GPS receiver and a Geiger Tube, a sensor able to detect radioactivity.

Our device continuosly measures ambient radioactivity and GPS position and saves them on a cloud database using your smartphone as a WiFi hotspot.

You can turn on your device, put it inside you backpack (here’s the origin of the name), pick up you bike and ride all around you town. When you’re back at home you can view a heatmap of radioactivity level you encountered during your ride.

Geiger Backpack with Intel Edison – [Link]

2 Digit 99 Seconds Timer

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2 Digit Count Down Timer is a utility Count Down timer project for upto 99 seconds of countdown time. This project can find many uses in your shack and home. The relay output remains on during the Count Down period, allowing you to interface load or alarm that you want to keep it on for a certain amount of time (in seconds).

Specifications

  • Microcontroller based design for greater accuracy and control
  • Power supply input 12 VDC 200 mA
  • Two 0.5″ display segments to display time
  • 12V SPDT (Single Pole Double Throw) relay for alarm use
  • Single key start and dual key alarm time set function
  • Power and Relay-On LED indicator
  • Terminal connectors for connecting power supply input and relay output to the PCB
  • Onboard regulator for regulated supply to the kit
  • Crystal resonator based design for better accuracy
  • PCB dimensions 72 mm x 81 mm

2 Digit 99 Seconds Timer – [Link]

Smart Watch

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Matthew Filipek from Cornell Univercity has build a nice smart watch with 1.7 inch touch screen, SD card, Bluetooth module and various apps.

One of the main inspirations for this project was Jared Sanson’s implementation of a DIY smartwatch (REF 0). With several design iterations, he was able to produce a watch in a very small package that can communicate with a PC via USB HID, features an OLED display, and has support for an accelerometer. As my project was to be completed in the span of a mere month, several of the components I got were purchased for their ease of use rather than their compactness.

Smart Watch – [Link]

RELATED POSTS

SerialUSB: A cheap USB proxy for input devices

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Serialusb is a cheap (~$5) USB proxy intended to be used with input devices. It is the combination of:

  • a PC software operating the host side of the proxy
  • an atmega32u4 firmware operating the device side of the proxy

SerialUSB: A cheap USB proxy for input devices – [Link]