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| making a simple IR transmitter |
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| madires:
--- Quote from: msuffidy on October 29, 2020, 03:28:14 pm ---I have 2 of these transistors from a CFL light here. Are they too far from the 5V range? I am thinking they will work. --- End quote --- Those are meant to switch high voltages and have a low hFE. Use a jelly bean NPN, like 2N2222 or BC547. |
| msuffidy:
Thanks. I do have a lot of scrap I can review. I still think this is like I have the dongle. I have to get the JTAG thing working. Connect the dongle to a resistor and the led. Probably work. I mean sorry, I think it is 15mA gpio, so I think I can use it? |
| madires:
It should work, but it won't give you much range. Many IR LEDs are rated for 100mA (as long as they stay cool). |
| msuffidy:
I am starting to feel like I am bothering this group much, but the uscale xc800 is not looking promising. This is because it does not simply start up outside of its windows IDE as I want to use linux. Getting it to a starting manner requires undocumented JTAG calls to the micros or a analog multiplex switcher on board. I am now reviewing getting an arduino atmega 328p for $10 in town someone is selling, or programming the Renesas devkit to trigger on a signal to its pin header GPIO in, or uart, and then turning on a GPIO out. So like a signal control switch. I am not sure what state the micros start up in with the uscale, and I am not sure if any standard source can translate into a JTAG device address access tool. |
| MosherIV:
No bother. I did warn you that trying to re-purpose debuggers would be a lot of work. Do yourself a favour, just buy a regular usb to serial adapter, preferably a well supported one like CH340 or CP2102, and then you can just use the Tx output to drive IR LED. |
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