Search found 10 matches

by cgull
Wed Mar 04, 2015 9:06 pm
Forum: Wireless/RF
Topic: Is wireless, wireless?
Replies: 6
Views: 898

Re: Is wireless, wireless?

Have you looked into solar panels to get an idea how much energy per square foot they generate in full sun vs. ambient light? Also what size speaker are you talking about? I assume you're looking for a very small speaker. Having an idea is the first step. Now you need to define the parameters for ho...
by cgull
Wed Feb 25, 2015 11:09 pm
Forum: Arduino
Topic: 12v to Arduino input using standard Songle relay. Am I ok?
Replies: 3
Views: 896

Re: 12v to Arduino input using standard Songle relay. Am I

Ok thanks! It seemed ok (5V) based on my multimeter measurements so I'm glad I asked. I've been learning about the optoisolator from previous searches so will definitely go that route.
by cgull
Wed Feb 25, 2015 9:23 pm
Forum: Arduino
Topic: 12v to Arduino input using standard Songle relay. Am I ok?
Replies: 3
Views: 896

12v to Arduino input using standard Songle relay. Am I ok?

I bought a cheapo RFID reader on eBay that outputs 12v when a valid key fob is presented. It came with a 12v Songle relay. Will it damage my Arduino if I connect the switching side of the relay to a 5v regulated power supply and to the digital input of the Arduino? I found lots of results on related...
by cgull
Sun Feb 22, 2015 8:05 am
Forum: Arduino
Topic: Connect alarm sensor with claimed 28v NC alarm output?
Replies: 5
Views: 733

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

That worked thanks!!! I had a button wired on my breadboard from previous examples so it was basically plug and play. This was the first time I used the internal pullup vs using a resistor so that was good to learn too.
by cgull
Sat Feb 21, 2015 4:34 pm
Forum: Arduino
Topic: Connect alarm sensor with claimed 28v NC alarm output?
Replies: 5
Views: 733

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

I measured the resistance and it is 5.1 (on the 200 setting) when it wasn't tripped and when tripped the meter just shows a '1.' which usually means it's out of range. No matter what range I have the ohmmeter on it always shows '1.' when the sensor is tripped. I have a Sperry DM-350A btw. I figured ...
by cgull
Sat Feb 21, 2015 9:19 am
Forum: Arduino
Topic: Connect alarm sensor with claimed 28v NC alarm output?
Replies: 5
Views: 733

Connect alarm sensor with claimed 28v NC alarm output?

Disclaimer: I just got the Uno R3 this week and am at the bottom of learning curve :oops: The only thing I've really done at this point is run through all the basic tutorials for wiring all the components. I have an Optex AX-70TN photo eye that I would like to connect to the Uno R3. I'm powering the...
by cgull
Sat Feb 21, 2015 8:55 am
Forum: General Chit Chat
Topic: Simple circuit help for COMPLETE noob
Replies: 9
Views: 2470

Re: Simple circuit help for COMPLETE noob

I got the Arduino Uno R3 and wired and programmed my simple delay logic! Definitely less of a learning curve than building it from scratch with a 555! I googled the one shot timer and will definitely use the schematics once I get all the components in! The Optek photo eye is expensive but it appears...
by cgull
Tue Feb 17, 2015 8:20 pm
Forum: General Chit Chat
Topic: Simple circuit help for COMPLETE noob
Replies: 9
Views: 2470

Re: Simple circuit help for COMPLETE noob

The Trinket 5V is sold out so I got the Arduino R3 so I can learn on in the meantime. I figure if I get it working on the Uno R3 I can get it working on the Trinket. I don't know what's in the sound box other than it plays a tone when the voltage spikes when the photo eye (or motion detector) is tri...
by cgull
Mon Feb 16, 2015 10:19 pm
Forum: General Chit Chat
Topic: Simple circuit help for COMPLETE noob
Replies: 9
Views: 2470

Re: Simple circuit help for COMPLETE noob

I think doing this with a Pro Trinket (never heard of this before today) or Adruino pro/mini/nano is a great idea. I've been wanting to get in to Arduino for a while and this would give me a great excuse to get one. I will definitely get a couple accessories as you mentioned cod. I'll put the order ...
by cgull
Sat Feb 14, 2015 11:46 pm
Forum: General Chit Chat
Topic: Simple circuit help for COMPLETE noob
Replies: 9
Views: 2470

Simple circuit help for COMPLETE noob

I develop software for a living but have a hobby project at home that is crossing over to the hardware domain. My end goal is to have a circuit board fabricated but if I can do this with a breadboard in the meantime it would be fun to learn something. I'm a fish out of water so please go easy on me ...