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Search results: 40   Output: 31-40
  1. Eric Ayars Overview The Arduino Pro Mini is a microcontroller board based on the Atmel ATmega168 (datasheet). It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, an on-board resonator, a reset button, and ...
    12-12-2010
  2. Mechanics This is not the best mechanical system and I am always open to new ideas and suggestions. Originally I started out with a plastic worm gear and plastic 50 tooth gear, always in contact with each other. Then one day I forgot the gears were ...
    20-10-2010
  3. Andy Collinson Description: This hybrid circuit uses a mixture of transistors, an IC and a relay and is used to automatically open or close a pair of curtains. Using switch S3 also allows manual control, allowing for curtains to be left only ...
    20-10-2010
  4. Software PIC Software The PIC software is written in assembler and based on earlier projects using I 2 C interfaces. The EEPROM, PIC and external connector all share the same I 2 C bus and the PIC will not use it unless the thermistor is fitted. ...
    01-06-2010
  5. Andrew M. Bishop Description This project uses a Microchip PIC microcontroller, a serial EEPROM and a thermistor to create a temperature recorder. Performance The temperature is measured and stored at user programmable intervals; this can be from 1 ...
    12-05-2010
  6. A flashing LED signals the necessity to water a plant Very low current consumption - 3V powered circuit Circuit diagram: Parts: R1, R4 470K 1/4W Resistors R2 47K 1/2W Trimmer Cermet or Carbon R3 100K 1/4W Resistor R5 3K3 1/4W Resistor R6 15K 1/4W ...
    29-09-2009
  7. Six timing positions suited to different skin types Timing affected by sunlight intensity Circuit diagram: Parts: R1 47K 1/4W Resistor R2 1M 1/4W Resistor R3,R5 120K 1/4W Resistors R4 Photo resistor (any type) C1,C3 10µF 25V Electrolytic ...
    17-08-2009
  8. Wojciech Zabolotny This is an old design. Some of the components may be difficult to buy. If you would like to build an even better and cheaper A/D converter, take a look at the new PICADC3 design. The PICADC is a simple 12-bit, 8-channel analog to ...
    20-07-2009
  9. This rain detector will give you a heads-up the instant it starts to rain, hopefully giving you time to close windows and bring in possessions. The battery-powered circuit draws virtually no current when the sensor is dry and the current ...
    05-11-2008
  10. Gang Xie Description Do you often forget to irrigate your plants? Do you have to ask your neighbors to take care of them when your whole families are out for a vacation? Don’t worry any more! Here is a solution. This embedded system, ...
    10-10-2007
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