| Products > Test Equipment |
| Brymen IR connection protocol - Anyone sniffed it yet? |
| << < (8/31) > >> |
| microbug:
Has anyone else noticed this? |
| jadew:
@microbug, Yes, but it's the protocol for the cable, not the meter. It's also what confused me, because I was living under the impression that there's a more complicated handshake. |
| rastro:
--- Quote from: jadew on October 02, 2013, 11:52:50 pm --- The cheapest MCU with USB that I know of is the PIC18F14K50. --- End quote --- Great detective work. I'm looking to purchase a Brymen. I'd rather build my own cable and also make it OSX compatible. You may also consider the New Pro Micro ATmega32U4 5V 16MHz. Selling on eBay for around $8.00US delivered. http://www.ebay.com/itm/New-Pro-Micro-ATmega32U4-5V-16MHz-Replace-ATmega328-Arduino-Pro-Mini-/181177986498?pt=LH_DefaultDomain_0&hash=item2a2f0cadc2 |
| Simon Loell:
Not because I wan't to make this a religions war on PIC vs. AVR, but I too would prefer an AVR. Mostly because of my experience. And the Pro Micro Arduino board you link to Rastro, looks very promising. It only needs a power stage (SOT23 N-FET) for driving the TX IR LED. I won't be making a lot of measurements before monday, but this project has triggered somthing in me. |
| jadew:
Yeah, I'd prefer an AVR as well. I guess we'll see, I'll do some tests tonight, after work, with V-USB and if the USB stuff takes less than 1ms to complete, it shouldn't interfere with our clock too much and we could do this with a tiny25, tiny2313. As for the TX transistor, looks like it could do with out, but I guess it's better to have it in. It needs about 30mA (in my case), which is doable from one pin on the tiny2313. |
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