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Search results: 42   Output: 31-40
  1. Introduction Digital timer switches are used to control the operation of electrical devices based on a programmed schedule. This project describes a programmable digital timer based on a PIC16F628A microcontroller from Microchip that can be ...
    10-02-2011
  2. Magirescu Iulian Introduction In the first place, a relay is like a switch to a coil assembly. This switch is activated when electricity is applied to the coil. With a common relay, the electricity must be continuously applied to the coil to ...
    15-12-2010
  3. 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
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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
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