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Hey guys,
Haven't been on this thread for a while, but I've come up against another problem.
My TSOP34138 ir receiver module acts strangely.... I can have it facing an ir transmitter, emitting 38kHz ir, and it won't output a LOW, and when I move my hand in front of the transmitter (as if to...
Hey guys,
I have 2 electric fence monitors, both the same model, (user manual is attached) and they were assembled by another person. He has done them both slightly different. They both have a multi wired cable attached to the various inputs and outputs. This cable has 4 wires within it's...
I tried it and it worked pretty well! I got about 1.5 - 2m of range with only using the arduino as a current source. I had my pulse running for 6 phases and pausing for 6 phases.
The circuit with the transistor isn't working well though. It blew two of my ired's!! This was with a 100ohm...
I a going to try changing my duty cycle and pulse length. I am going to have the ired pulse for 6 phases, then pause for 20 phases. Ill see how that goes!
Oki doki! Well I'll run some more tests soon. I'm busy today and tomorrow, so I'll be onto it in a few days.
Thanks for all your help:)
I found this page too, I haven't had a good read of it, but it looks promising as far as helping me with distance. **broken link removed**
Here is my ir...
I am afraid you've lost me a bit here. If I have a 12Vs, and I want a bit less than 100mA, say 80mA, going through my ired (I have lots of different ones, but lets use the one with a continuous forward current of 50mA, and a forward voltage of 1.5V), then i need a collector resistor of 130ohm...
Well I was running the ired without a resistor, straight out of the arduino. So i guess that would have made it 20mA going through it.
I dunno... I'll ask about this problem on the arduino forum, and see if there is any help there.
---------- Post added at 16:09 ---------- Previous post was at...
Hmmmm well I don't know what the problem is then!! Because I've had this setup before, without the transister, and the IED was getting probably 40mA into it (I was maxing out the Arduino, which is bad) and it was transmitting over a distance of about 40cm. Now, with the setup I have currently...
I did do some reading to come up with the above explanation... Are you implying that I need to do some further reading?
Nice profile photo btw :))) You must be a good person to ask about transistors!!
Hey guys,
I have posted this elsewhere on the forum, but it wasn't in the correct category. I thought I might have better luck here!
Out of interest I tried to explain how, in a physicists terms, a transistor works. Below is what I came up with.
" For an NPN transistor: There are more excess...
Hey guys,
Just a quick one. On the following schematic, what does the circle symbol on the 'R' pin of the IC, and the positive and negative legs of the speaker, mean?
https://www.ladyada.net/make/drawdio/drawdiosch.png
Thank you:)
Cheers mate!
You are correct that the 12V supply is also powering the MPU. The MPU has a ground for its power supply AND a ground for the circuit it's controlling (in this case the transistor circuit). The latter ground is not connected in the setup I have at the moment. I think this could be...
Hey guys,
I have just tested out the recommended transistor and resistor setup - 100R on the collector and 1K on the base - this has given my infrared emitter very poor emitting distance, compared with when I didn't have the setup (with the transistor) that I have now. I currently have my...
Hey guys,
Just out of interest I tried to explain how, in a physicists terms, a transistor works. Below is what I came up with.
" For an NPN transistor: There are more excess electrons in a single the N layer of the NPN transistor than there are holes in the P layer - the P layer is very thin...
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