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Re: Connect alarm sensor with claimed 28v NC alarm output?

 by Mee_n_Mac ¦  Sat Feb 21, 2015 1:14 pm ¦  Forum: Arduino ¦  Topic: Connect alarm sensor with claimed 28v NC alarm output? ¦  Replies: 5 ¦  Views: 755

The problem is I'm not seeing anywhere near 28V when I connect my multimeter. In fact, it barely registers on my multimeter when triggered and the reading fluctuates the whole time. I must be doing something wrong b/c it reads well under 1 volt when tripped. I measured the DC power in just to make ...

Re: How do I drive high current 12V using arduino Arduino?

 by Mee_n_Mac ¦  Fri Feb 20, 2015 7:39 pm ¦  Forum: Arduino ¦  Topic: How do I drive high current 12V using arduino Arduino? ¦  Replies: 6 ¦  Views: 1120

powercircuits wrote:Another thing to keep in mind is ...
I think the OP is long gone. His post was another hit'n'run.

Re: How to identify what LED you have

 by Mee_n_Mac ¦  Fri Feb 20, 2015 7:02 pm ¦  Forum: Projects ¦  Topic: How to identify what LED you have ¦  Replies: 8 ¦  Views: 773

You must not drink as much as I. :P :o :?

http://youtu.be/Mzcgyk62cHU

Re: What do i have with these 2 LED's and 3 resistors

 by Mee_n_Mac ¦  Fri Feb 20, 2015 6:53 pm ¦  Forum: Projects ¦  Topic: What do i have with these 2 LED's and 3 resistors ¦  Replies: 3 ¦  Views: 486

So I was playing around with some LED's I had laying around, I'd like to know if this setup is effiecent or if I should change something around. Your setup, assuming this ties into your other thread is the usual case. No it's not the most efficient in terms of LED output vs power consumed. Let's sa...

Re: How to identify what LED you have

 by Mee_n_Mac ¦  Fri Feb 20, 2015 6:28 pm ¦  Forum: Projects ¦  Topic: How to identify what LED you have ¦  Replies: 8 ¦  Views: 773

I turn my current all the way up and when the LED is at full brightness, it will give me the current it's consuming. Your vernier on the voltage must be a fine tune indeed! I know my shaky fingers would fry an LED. I can see it now ... 3.1v, not on ... 3.2v, barely on ... 3.3v, very bright and ... ...

Re: Is it possible to control 2 sets of LED's with 1 rf remo

 by Mee_n_Mac ¦  Fri Feb 20, 2015 4:15 pm ¦  Forum: Projects ¦  Topic: Is it possible to control 2 sets of LED's with 1 rf remote ¦  Replies: 5 ¦  Views: 461

The output pins of the decoder can't supply 20 mA. Can I assume you have the 2 red LEDs and 440 ohms between the D2 pin and ground ? If so you might have expected 13 mA but you wouldn't be getting that in reality. Still if those LEDs were bright enough, you could try the scheme above with R2 = 100 o...

Re: Is it possible to control 2 sets of LED's with 1 rf remo

 by Mee_n_Mac ¦  Fri Feb 20, 2015 2:15 pm ¦  Forum: Projects ¦  Topic: Is it possible to control 2 sets of LED's with 1 rf remote ¦  Replies: 5 ¦  Views: 461

A power switch will also turn off the RF circuitry as well as the decoder and LED circuitry. Even w/o any LEDs on, the rest of the circuit is going to draw power. How much ? I can't say ATM. I'm tracking down a better datasheet than the one Adafruit supplies in order to see what kind of current the ...

Re: Is it possible to control 2 sets of LED's with 1 rf remo

 by Mee_n_Mac ¦  Fri Feb 20, 2015 5:47 am ¦  Forum: Projects ¦  Topic: Is it possible to control 2 sets of LED's with 1 rf remote ¦  Replies: 5 ¦  Views: 461

Yes you can switch from 1 set of LEDs to the other via cosequtive button pushes. A way to do that would be to use a DPDT relay. One pole can be open when the relay is de-energized, the other is closed thus turning on 1 set of LEDs. Then when the relay is energized the contacts switch states. Now the...

Re: What do i have with these 2 LED's and 3 resistors

 by Mee_n_Mac ¦  Fri Feb 20, 2015 5:24 am ¦  Forum: Projects ¦  Topic: What do i have with these 2 LED's and 3 resistors ¦  Replies: 3 ¦  Views: 486

What voltage is used in the circuit ?

Re: need help with multiple shield options

 by Mee_n_Mac ¦  Thu Feb 19, 2015 6:28 pm ¦  Forum: Forum ¦  Topic: need help with multiple shield options ¦  Replies: 1 ¦  Views: 1328

What other circuitry will be needed for the sensors ? Perhaps a shield type arrangement is not the best.

Re: MP3 Player Using PIR Sensor 150215

 by Mee_n_Mac ¦  Tue Feb 17, 2015 9:29 pm ¦  Forum: SparkFun Product Questions ¦  Topic: MP3 Player Using PIR Sensor 150215 ¦  Replies: 8 ¦  Views: 1034

Can you post a link to the PIR sensor used ? That # (150215) doesn't go to any product I can find. ATM I'll assume the PIR has some OC type output w/a pull-up to 5v. That it goes LOW when/while motion is detected. That you have that output connected to pin 0 of the Arduino. [FWIW I wouldn't use pins...

Re: too slow speeds w/ big easy driver + stepper

 by Mee_n_Mac ¦  Tue Feb 17, 2015 8:55 pm ¦  Forum: SparkFun Product Questions ¦  Topic: too slow speeds w/ big easy driver + stepper ¦  Replies: 5 ¦  Views: 732

It appears that you haven't set an acceleration parameter and I'll guess trying to go to 20,000 RPM all at once is too much. Try setting a lower speed and/or a reasonable acceleration.

Of course this assumes you've got a good supply and set the current limit to some good value.

Re: xbee shield, change dline pin(s)

 by Mee_n_Mac ¦  Tue Feb 17, 2015 5:35 pm ¦  Forum: Arduino ¦  Topic: xbee shield, change dline pin(s) ¦  Replies: 1 ¦  Views: 562

The switch on the shield selects which set of 2 pins end up connected to the XBee Din and Do pins. One position gets you the Uno's D0 and D1 pins. The other position selects whatever 2 pins are connected to the solder jumpers. From the factory those pins are D2 and D3. Open up the solder jumpers and...

Re: TSL2561 Sketch Error Message

 by Mee_n_Mac ¦  Tue Feb 17, 2015 4:27 pm ¦  Forum: Arduino ¦  Topic: TSL2561 Sketch Error Message ¦  Replies: 9 ¦  Views: 1157

jwtrexler wrote:Yes, it's consistent. I'll make your suggestions and see.
Try printing out gain, ms and a new variable, ratio, after the light.getLux() call.

Declare ratio as a double and set it;
ratio = data1/data0.

Re: Cattle Siren Project

 by Mee_n_Mac ¦  Tue Feb 17, 2015 11:36 am ¦  Forum: Projects ¦  Topic: Cattle Siren Project ¦  Replies: 4 ¦  Views: 953

If the motor is rated at 96 Watts, then at 12V it'll draw 8 amps once spun up. I'd worry that your 5 secs of on time isn't long enough to get it spun up.

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