Posted at: Tue, Jul 28th, 2009 | 11:44AM UTC By Josh Ashby
A few people have asked how I do the curvy traces in eagle so I though I would do a little 5 sec how to, simply, when routing, use the three curvy lines for the trace style at the top of the eagle window:
Posted at: Tue, Jul 28th, 2009 | 1:41AM UTC By Josh Ashby
It’s the middle of the night and I just got my arduino i2c code to work, been working on it all day. All it does is the master reads the usb, then sends that data over the i2c bus, and the slave reads the data and if it is an ‘A’ then it lights up a led till more data comes through the lines. Enjoy: http://github.com/JoshAshby/i2c/tree/master
Posted at: Sat, Jul 25th, 2009 | 5:37PM UTC By Josh Ashby
Warning: This is a work in progress, getting updated when I have time to work on it. The main part is done but I have yet to add photos and refine it more, sorry for the rough reading.
So you’ve got your board designed and ready to make a prototype, but you don’t know how. Thats what this is Tutorial is for. Read more…
Posted at: Sat, Jul 18th, 2009 | 8:16PM UTC By Josh Ashby
Finally got to radioshack and got a starter bottle of ferric chloride, and a dual sided copper board, I also finished the final, ready to etch versions of the boards. All the extra vias on the motor control board are for a little prototyping area.
Both layers of the motor controller board, the extra vias in the bottom left side of the board is a small prototyping area.
Posted at: Wed, Jul 15th, 2009 | 12:49PM UTC By Josh Ashby
Yesterday me and Jeremy got together and decided to make a stop motion animation. Stop motion is tedious work, taking a photo after every little move, but has a cool effect. so heres the video:
Posted at: Tue, Jul 14th, 2009 | 8:50PM UTC By Josh Ashby
Update 7-15-09: I got a better board designed and hope to soon etch it, here it is:
BOB's v3 Motor Controller
I finally got around to desgining BOB’s motor controller board in a schematic:
JP1 is the thermistor; JP3 is the mosfet control connector; JP5 is the relay control connector
The caption says it all, JP1 is the thermistor; JP3 is the mosfet control connector; JP5 is the relay control connector. The picture should be linked to the picasa album with the board and schematic.
Posted at: Mon, Jul 13th, 2009 | 6:57PM UTC By Josh Ashby
I finally got around to finishing BOB’s version 2 board, and the motor controllers, I’ll have a schematic of his whole board up after I make one, and I’ll see about making a video of him running soon. So heres what’s new on his board:
Thermal cut off: when the temp gets too high, as monitored by a thermistor, an op-amp (741) will trigger a transistor that the motor controllers data flows through, cutting off data to the mosfets and hopefully stopping him.
Improved mosfet control: the mosfets are being driven at the 10-12v range now, instead of the 5v on ver. 1, this means the mosfets (irf540N) will open more and allow more amps to flow to the motor and less heat be generated on the mosfets.
Flyback diode: i’ve added a flyback diode to each of the motor controllers to help with spikes from turning on and off the motor.
