Sunday, April 29, 2012

Liquid level indicator for the visually impaired

›
My dad has had glaucoma for about a decade now and in the last 7 or so years has been nearly completely blind. He's been able to cope to...
1 comment:
Monday, April 2, 2012

Equation for determining belt size of a three-pulley system

›
April 3 Erratum: Thanks to rickets007 I spotted several egregious errors! I had used pulley diameter in some parts when clearly I was intend...
20 comments:
Monday, March 12, 2012

I2C dual voltage mystery solved

›
Remember that strange phenomenon on the dual voltage I 2 C bus where I was getting 3.4V on the 2.8V bus and 4V on the 5V bus? Well, I final...

Quirks on dual voltage I2C bus / Using a 5V LCD with an MCU at less than 5V

›
[ Update: I know what's causing the overvoltage condition on the I 2 C. Find out over here . ] Previously I talked about how a MMA76...
1 comment:
Sunday, March 11, 2012

MMA7660FC Accelerometer on dual voltage I2C bus

›
I recently got a Freescale MMA7660FC accelerometer already soldered on a breakout board. It's made by made by Tautic and comes complet...
2 comments:
Thursday, March 1, 2012

TNG traffic light - epilogue

›
Each of the two LED boards on top of the signal tower traffic light are joined to the "platform board" via 9 solder joints. I cer...
1 comment:
Monday, February 27, 2012

Toy traffic light - the next gen is here

›
After so much anxiety over how to build and secure the 7-segment LEDs to top of the signal tower--and at the same time permit the cap to be ...