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Airsoft turret with IR controlled pan and tilt motion
Written by Administrator   
Wednesday, 01 June 2011 00:00



Chris
have sent his latest project where he built an airsoft turret system that can be controlled with TV remote. Pan and tilt are controlled with couple servo motors that are connected to PIC18F4520 microcontroller. Microcontroller accepts commands from IR remote by using IR receiver that accepts standard 38kHz modulated signals. 

Airsoft gun is fired by activating separate fire motor that gets signal from dedicated microcontroller pin via transistor. Whole system is assembled inside plastic Tupperware dish that serves as a base and dome. Airsoft part is taken from generic fully automatic airsoft pistol. Why not add a laser pointer and start real the fun…

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Last Updated on Thursday, 11 August 2011 05:42
 
DIY Park Ranger
Written by Administrator   
Thursday, 26 May 2011 00:00


The Park Ranger is an ultrasonic-ranging prototype designed to assist drivers who are backing into tight areas.  The ranger uses ultrasonic pings to measure distance to the object behind and indicates this distance by sending audible tones to your FM radio.  Optional panel-mount LEDs offer visual aid for calibration as well as warning drivers behind you.

The intention of this project is to demonstrate the Amani64ʼs ability to serve as a rapid-prototyping tool for applications typically covered by proprietary modules.  While a commercial ultrasonic-ranging module could be used in this project, the Amani64 is used in instead to tailor the system to our exact needs.  The user can drop in blocks of IP, whether open-source or their own, to create a custom application over which they have full control and ownership.  A CPLD-based prototyping board is useful for any application that requires logical circuits, whether they be parallel or sequential, that space, cost, and vendor-delivery times are a concern.

DIY Park Ranger –[Link]

Last Updated on Thursday, 26 May 2011 00:41
 
Logging Heartrate with an AVR and microSD Card
Written by admin   
Monday, 23 May 2011 10:52

Authors: admin

schematic

tinkerish.com writes:

The objective of this project is to log one’s heart rate to an SD card. This could be done for extended periods, including during sleep, for some pretty interesting investigation. What is shown in the video is the logging of a treadmill session with periods of jogging and walking to see the fluctuations in heart rate.

Read More: [link]

Last Updated on Thursday, 11 August 2011 22:10
 
ATtiny861 sound generator
Written by Administrator   
Monday, 23 May 2011 00:00


This project by “elm chan” produces sound using an ATtiny861. A MicroSD card is used as storage media and also SD and MMC can be used with proper socket conversion. It is controlled in SPI mode via USI. The audio signal is output in PWM and it can drive loudspeakers directly. 

image
imageRead more: [via]

Last Updated on Sunday, 22 May 2011 23:51
 
Generating complex sound waves on PC
Written by Administrator   
Monday, 23 May 2011 00:00


circuitgeek.com writes:

Generating sound waves from PC sound card isn’t new ting. You can even download tons of software that allows generating various waves like sine, square, triangle waves on speaker output. Such sound generator gives quite good results that are acceptable in most situations like testing audio equipment or feeding complex signals in to your projects.

Generating complex sound waves on PC –[Link]

Last Updated on Sunday, 22 May 2011 23:27
 
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