Show Posts
Pages: 1 2 [3]
31  Using Arduino / General Electronics / Re: Single PWM Trigger for Common Anode, and Common Cathode LED Strips on: January 19, 2012, 05:30:52 pm
You mentioned the base of the TIP120 twice in connection to the 2n2222 and didnt mention the TIP emitter at all? Could you please draw me a diagram, I am having difficulty picturing it... This isn't thread necromancy, I lost interest in this, and now I NEED to finish this...
32  Using Arduino / Networking, Protocols, and Devices / Re: Why isn't this used more? on: December 18, 2011, 06:04:47 pm
Home security/automation specifically. Moving up in the world from an apartment to a house, and to start, I would like to monitor some of the HVAC equipment, then add security, etc, as I go and in time. I planned on using mcu's but wireless seems like a waste for a three floor house with all this unused phone cabling. I realize I would need to terminate the lines.
33  Using Arduino / Networking, Protocols, and Devices / Re: Help on Bluetooth interfacing on: December 18, 2011, 05:17:12 pm
You aren't very clear on what the problem is. Are you unable to change the name of the device, or does nothing work?
34  Using Arduino / Networking, Protocols, and Devices / Why isn't this used more? on: December 18, 2011, 05:00:48 pm
Why don't I see more posts about eia-485? http://en.wikipedia.org/wiki/RS-485 I would like to use this on the spare (yellow and black) telephone wires for home automation/security but am wary because there aren't many posts about people using it. Are there problems I have yet to read about?
35  Using Arduino / General Electronics / Re: Single PWM Trigger for Common Anode, and Common Cathode LED Strips on: August 23, 2011, 07:22:20 am
Does nobody know?
36  Using Arduino / General Electronics / Single PWM Trigger for Common Anode, and Common Cathode LED Strips on: August 22, 2011, 09:53:23 pm
I am looking for a simple yes or no on "will this work?":

I am building a PWM controller for light strips from DealExtreme. The strips come in both Common Anode (CA) and Common Cathode (CC) varieties depending on what is in stock at the moment... Aside from that, they use 12volts out of the box. Since I intend to buy these in quantity, I need my final product to be flexible...

To describe the fragment of my controller schematic attached:
RCHAN1 - PWM line from arduino Mega for Red LED's Channel 1
GCHAN1 - PWM line from arduino Mega for Green LED's Channel 1
BCHAN1 - PWM line from arduino Mega for Blue LED's Channel 1
RCHAN2, etc... Channel 2 Blah Blah Blah (same as channel 1)

From the above lines, a 2N2222 is triggered, further switching TIP120's setup to drive 12 Volt lines of either CA or CC.

So, Will it work?

Almost forgot, on the Common Anode half, the LED strip's +12 is connected to +12, and on the Common Cathode hale, the LED strip's GND is connected to GND. Also, the ROUT,GOUT,BOUT, etc, are broken out to screw terminals in my proposed design, along with GND/+12
37  Using Arduino / Project Guidance / Re: Car underglow/Color Organ on: June 28, 2011, 12:27:48 pm
Ok, I looked into the graphic equalizer shield, but aside from the noise I read about in the comments, that gives me the option of triggering on 63Hz and 160 Hz two specific frequencies in the spectrum (with user adjustment per "song") of 20Hz to 200Hz which is considered by Wikipedia to be considered "bass", while THX considers frequencies 80Hz and lower to bass, this isn't a theater, it's a car. I hope this doesn't disqualify me from receiving assistance, but this is for what I hope becomes a Product.

One thought I had (be honest even if brutally so) was to actually include the circuit for an LED color organ from http://blog.makezine.com/archive/2010/10/circuit-skills-led-color-organ-spon.html but instead of having the final transistor array switch on and off LED's I thought about having them trigger a digital low on an input pin once this mode was selected.
38  Using Arduino / Project Guidance / Car underglow/Color Organ on: June 27, 2011, 02:45:28 pm
I have started on a project, but have hit a wall.

Car underglow kits are too basic, using PWM through FET Channels, I intend to control RGB LED Strips with an arduino for full spectrum color, including a mode for color chaser (going through the entire spectrum automatically instead of a single user set color). The part I am having difficulty with are the two additional intended modes "Response" and "Chaser Response". I want to press mode and have the set color flash on every time the bass hits in the music I am listening to (audio passthrough). Pressing mode again, I want a different color (most likely from a list of 64 or so presets) to pulse on everytime the bass hits on the car system.

Programming won't be a problem. I am curious as to what hardware approach to take? Audio EQ IC, A2DC, etc? How do I get the 20-200Hz Range to trigger a change in an Analog or Digital Pin?
Pages: 1 2 [3]