D
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A quick preamble, up until about a week ago my knowledge on this subject would have easily have fitted on the back of a postage stamp. A chance comment on the forum by Rik of http://riksrailway.blogspot.co.uk/2013/12/progress-report-50.html with regards to the work Greg had done with Picaxe Micro controllers at http://www.members.optusnet.com.au/satr/electronics.htm and along with the following topic on this forum, Topic: Info req'd on keyfob R/C, got me thinking.
A chance purchase of a tin of assorted electronic junk for an exchange of small coins (no flat stacking notes) a few Sundays ago at the Car Boot Sale, contained something similar to that was discussed in the topic.
A visit to my local Maplins and a very informative conversation with several members of their Sales Team, came away with a small bag of bits to start my adventure with micro controllers.
Then followed a period of academic studying of the Picaxe manuals, data sheets and schematics has resulted in the following project.
In simple layman’s terms, the keyfob transmits an encoded data stream which is received by the receiver and then decoded to operate the D0,D1,D2,D3 outputs to either on or off states.
The on/off states are then fed into the inputs of Picaxe 14M2, where I am still learning the basics of Picaxe Basic Programming to then produce a program that operates the outputs on the 14M2.
For the moment as this project is still in it's infancy Buttons C&D on the keyfob operate the turning on or off of a pair of led's
Buttons A & B operate the forward and reverse, from the 14M2 via a L293D motor controller IC using PWM to a Tamiya FA130 3 volt motor, fitted in a Tamiya 70103 gearbox, using the axle and wheels from LGB.
First version, manual control via potentiometer, 08M2 micro controller and an L293D motor controller IC. This was constructed to grasp the fundamentals of strip board construction and correct orientation and connections of the IC's.
Third version using Infra Red, experimentation with software ongoing.
Fourth version using the input from a RC receiver commenced.
Second version, work in progress, bread board set-up.......
A short video..............
http://s1157.photobucket.com/user/Eaglescott/media/G%20Scale%20Central/RemoteControl.mp4.html
Project does work much to my surprise!, just need to disconnect the wireless doorbell as it works on the same frequency, did check with my neighbour who has an automatic garage door opener, hers works at 315MHz, so can avoid this situation!
http://www.youtube.com/watch?v=Jm4ZE3q6S1Q
A chance purchase of a tin of assorted electronic junk for an exchange of small coins (no flat stacking notes) a few Sundays ago at the Car Boot Sale, contained something similar to that was discussed in the topic.
A visit to my local Maplins and a very informative conversation with several members of their Sales Team, came away with a small bag of bits to start my adventure with micro controllers.
Then followed a period of academic studying of the Picaxe manuals, data sheets and schematics has resulted in the following project.
In simple layman’s terms, the keyfob transmits an encoded data stream which is received by the receiver and then decoded to operate the D0,D1,D2,D3 outputs to either on or off states.
The on/off states are then fed into the inputs of Picaxe 14M2, where I am still learning the basics of Picaxe Basic Programming to then produce a program that operates the outputs on the 14M2.
For the moment as this project is still in it's infancy Buttons C&D on the keyfob operate the turning on or off of a pair of led's
Buttons A & B operate the forward and reverse, from the 14M2 via a L293D motor controller IC using PWM to a Tamiya FA130 3 volt motor, fitted in a Tamiya 70103 gearbox, using the axle and wheels from LGB.
First version, manual control via potentiometer, 08M2 micro controller and an L293D motor controller IC. This was constructed to grasp the fundamentals of strip board construction and correct orientation and connections of the IC's.
Third version using Infra Red, experimentation with software ongoing.
Fourth version using the input from a RC receiver commenced.
Second version, work in progress, bread board set-up.......
A short video..............
http://s1157.photobucket.com/user/Eaglescott/media/G%20Scale%20Central/RemoteControl.mp4.html
Project does work much to my surprise!, just need to disconnect the wireless doorbell as it works on the same frequency, did check with my neighbour who has an automatic garage door opener, hers works at 315MHz, so can avoid this situation!
http://www.youtube.com/watch?v=Jm4ZE3q6S1Q