Schaer+ Programmer using PIC12F629 microcontroller

Description Schaer is a generic programmer circuit capable of uploading and downloading firmware to/from several electronic devices like microcontrollers and eeproms. This and other programmers came to my attention when I was working in CAMBADA, the robotic soccer team from the University of Aveiro, and since all other programmers available there were too expensive for me to buy or build, I decided to build ...

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A modified version of the “Air diplay” adapted to be used in a bicycle using PIC12F629 microcontroller

Anthony from Cumaná, Venezuela, made his own "Persistence of vision" (POV) display, similar to my Air Display but it can be mounted on any bicycle wheels and it displays fifteen messages in Spanish. Here is the PCB with each part of the project. It uses a 12F629, works with a voltage of 3Volts This is the PCB top view to determine the location of each part. The yelow ones are the resistors, the red ones are ...

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RGB LED PWM Driver for High Power 350mA LEDs V3 using PIC12F629

Description As featured in Electronics Weekly Gadget Freak (20/02/2008) The main reason I made this version is that I wanted to fit it in to the base of an Ikea Mylonit lamp. This lamp is made entirely from glass and has a small recess in the base with an entry for the power lead.  Since it had nowhere to fit a separate power connector but did have a slot for a power lead to pass in to the base, I needed to ...

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LED Strobe for PIC12F629 / 675

 Description This project functions as a simple strobe for driving an LED.  The use of an output transistor allows it to pulse the strobe LED with a current up to 100mA. Four jumpers provide options for changing the pulse width, strobe repeat interval and single or double strobe flash.  The programmer ready code has default timings which are easily customised by editing values in the PIC's EEPROM at program ...

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“Mini-Beacon” miniature programmable LED Flasher that is based around a PIC12F629 microcontroller

This project, called "Mini-Beacon", is a miniature programmable LED Flasher that is based around the PIC microcontroller.  This project grew out of an idea and recommendation posted on RunRyder.com.  The Mini-Beacon basically simulates the light emitted from a rotating light beacon such as those used in older police cars and fire engines.  As seen from the observer's perspective, as a real rotating beacon r ...

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Small Virtual Wall for iRobot Roomba using PIC12F629

The Virtual Wallis a circuit to mimic the behaviour of the iRobot Virtual Wall/Lighthouse, provided with the robot. It produces the same infrared pattern and the robot sees it as another virtual wall, blocking its path, while vacuuming. This circuit was built mostly using SMD components to reduce its size, nearly to the size of a 9V battery (PP3/6F22/6LF22/etc). Design Considerations After examining the ori ...

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LED FX using PIC12F629 Microcontroller

This project produces a number of effects on a set of three LEDs. You can also produce your own sequence and store it by using the 3 buttons. You can build the project on Matrix Board or buy a complete kit with pre-programmed chip. You can also program the chip yourself and use this project as the beginning to: "learning to write your own programs." This project takes the place of a number of flashing circu ...

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Test For Presence of Internal Oscillator Calibration Word for PIC12F629

Description The PIC 12F629 and 12F675 devices have an internal 4Mhz oscillator that enables the devices to be used without an external crystal or RC network.  This frees up one or two pins for I/O use and allows the device to be built into minimum component count designs. Problems arise if by accident or otherwise, the factory programmed oscillator calibration word, located at program memory address 0x3FF i ...

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Intel D945GCLF Small Front Panel using PIC12F629

Description This is a simple circuit with two buttons and two LEDs to control the D945GCLF Intel motherboard. Both power and reset buttons are included as well as hard disc activity  LED and power status LED. The special feature included is the sleep effect of Apple laptops on the power LED! Design and Implementation The design goals were: simple to connect to the motherboard; power button; the reset button ...

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RGB LED PWM Driver for High Power 350mA LEDs using PIC12F629

Description This project combines a PIC and three constant current 'buck' converters to produce an RGB LED controller that will operate with the the high power 350mA LEDs using PWM to control the LED brightness.  By driving the red, green and blue LEDs with varying pulse widths the controller can generate up to 16 million colours using fades, strobe and static effects. The use of surface mount components an ...

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