Message:

7:21am 09-21-2011
mahadev
hi
i wanted to build an automated device for my project using the parts of a cd drive. can i use the same circuit to program the automation? wat i mean is can i change the program of the cd drive? im a mechanical engineer and i dont know much about programming. please help.
Replied on: 12:28am 10-10-2011

No you would not be able to change the CD-ROM firmware, you will need to add a custom microcontroller to add the functionality you need.

4:15pm 09-09-2011
erar
Thank you
Replied on: 12:28am 09-16-2011

No problem.

5:29pm 08-27-2011
Saga
Hi Alan
I would like to buy your staircase light project kit. However, i can mount IR on one side of the not on the other. Instead of breaking the beam, Is it possible to use the PIR motion sensor with some modifications.

Regards
Saga
Replied on: 12:34am 09-16-2011

Hi Saga,

Yes, the stair lighting kit can work with dry contact devices such as motion sensors and under carpet pressure sensors. Please see page 35 of the manual for details.
http://alan-parekh.com/kits/stair-light-kit/

You will need two additional resistors which can be found here http://alan-parekh.vstore.ca/components-resistors-c-12_13.html

The beam needs to be mounted on opposite sides of the stairwell to work properly.

If you are looking for a system with more features please have a look at the Reactive Lighting system.
http://reactivelighting.com/

4:06am 08-12-2011
RAMU
WHAT IS MENT BY JAMMER
Replied on: 10:35am 08-19-2011

The IR Jammer is a device that overwhelms an IR detector so that normal commands can not be received.

12:44pm 08-06-2011
arshiya
hi alan....
thats gr8
7:16am 07-28-2011
Ernest Cordeiro
Hi Alan - I purchased the stair light system a few months back while completing my basement. I have finished it and installed the lights and they are fabulous. People love the system and many have inquired about it. My friends on FB are impressed and I have pointed them in your direction - please expect a few hits and some orders of the same.
Replied on: 10:34am 08-19-2011

Glad you liked it! Thanks for the promotion to your friends.

9:25pm 07-17-2011
adrian
Hi Alan,
I was looking to see how did you make that hard drive motorcycle. I thought it was so cool and I would like to make one for my uncle.
Replied on: 12:35am 09-16-2011

Yes it looked great. It was just featured on Hacked Gadgets though and was not made by me.

11:31am 07-15-2011
kurt
Hi Alan,
I could help and recommend a PIC Programmer, to record the (stair_ver1_0.exe) in the pic16f628
Replied on: 12:07pm 07-15-2011

Hi Kurt,

I would recommend a PICKit 2 or 3.

7:52pm 07-13-2011
Flor
Hi Alan, I'm from mexico and new in the electronics, I have problem to mount the LEDs on the plates R1, R2 Stair Lights will be possible to put a picture in the manual did suchas IR Transmitter Assembly, I am very clear about the configuration through I hope you can help me and my email is flormaria.contreras@yahoo.com
Replied on: 6:20am 07-14-2011

Hi Flor,

You can see on this page how the PCB connections are made.
http://alan-parekh.vstore.ca/mounting-board-p-71.html

This project shows you the step by step process of using one to power an LED.
http://hackedgadgets.com/2009/11/28/flashing-rgb-led-project/

3:10am 06-20-2011
Mohsin
Dear Alan,

Hi, Can you please send me the diagram for the analogue car temp and fuel gauge to digital conversion. Please send it to my email address. I need it badly thanks !

BR
Replied on: 8:08am 06-30-2011

This sounds like a project on Hacked Gadgets. Most of those project are just featured there. Please check for a link within the article for more info.

8:55pm 06-19-2011
GURJEET SANDHU
Dear Alan Hi!, Thanks for this nice POV project. I want to assemble the rotating led display. Pl. send me the circuit diagram and the source code.
Thanks and with regards.
Gurjeet Sandhu
Replied on: 8:09am 06-30-2011

Sorry, that project was done long ago and unfortunately I don't have the code for it.

6:12am 06-18-2011
tessa
can u suggest a method to build an RF reader which can hav a range upto 100 meters or above?
Replied on: 8:12am 06-30-2011

There are long range ones but I am not sure about 100 meters.
http://forums.coolest-gadgets.com/showthread.php?t=5686

9:46am 05-30-2011
Larry Graham
I liked this progect it is something I would like to try myself.
Replied on: 8:13am 06-30-2011

Great! Let me know how it works out.

5:28am 05-26-2011
Brian Park
You used sliprings to get the power to the rotor (You will damage the bearings passing current through them). I did the same thing with the following differences: A 4: circular circuit board carries the LEDs, a 6808 microcontroller, and a 27turn coil around its outside. Another 9turn coil or slightly larger diameter is mounted stationary close to the rotating coil. It is driven from 4 FETs and another microcontroller. The stationary controller accepts input from a serial link (or has a self-running program) and drives the outer coil at 27KHz. The inner (rotating) coil picks up power by induction, and powers the rotating controller and LEDs. The information is sent by +/-90 phase modulation of the 27KHz. No sliprings needed. If you are interested in the design data for this, send me an email.
Replied on: 8:18am 06-30-2011

Interesting idea. Sounds like something that would be great to feature on Hacked Gadgets if you would like.
http://hackedgadgets.com/tip-us/

5:05am 05-26-2011
Brian Park
Comment about your meter clock: Your meters are way underdamped. You can fix this. The meter will be (I assume) a standard D'arsonval movement with a resistor in series to set the voltage scale. Disconnect meter from clock. Find the direct connection to the movement and connect a resistor substitution box directly across the meter. shake the meter (rotationally, about its axis, to cause the meter to deflect). With the meter movement shorted, you will have a grossly overdamped response (almost nothing). (That is how meters are shipped). Start with high resistance, and work down. Decrease resistance until the meter is critically damped (resistance that just stops the overshoot). You want to modify the resistor network to present that resistance to the meter. You will need to reduce the series resistance to restore the voltage calibration (roughly, anyway). Then you won't have all that bouncing going from 59 to 0 or 11 to 0
Replied on: 8:20am 06-30-2011

Great idea, I never would have thought to do that. I will need to give it a try on the next meter project!

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