<div dir="auto"><div dir="auto">Thanks for the pinout, i have that, but:</div><div dir="auto"><br></div><div dir="auto">My issue is this:<br></div><div dir="auto"><br></div><div dir="auto">When i use the wsprrypi app, i need a pin that will jump up from 0V to 5V when the Pi transmits, and the pin has to be able to supply about 10mA to a 5V reed relay.</div><div dir="auto"><br></div><div dir="auto">I can put a meter on various available pins, one by one, but i don't really know what i'm doing, and there is a good chance i will fry the Pi.</div><div dir="auto"><br></div><div dir="auto">So if anyone has actually done this, it would be great to hear about it. A pin that either goes to 0V (ptt) on transmit, or to 5V on transmit, using the wsprryPi program. To provide ptt to an external hf amp. </div><div dir="auto"><br></div><div dir="auto">Orrin wn1z</div><div dir="auto"><br></div><div dir="auto"><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Dec 1, 2016 15:57, "Craig Jungers" <<a href="mailto:crjungers@gmail.com">crjungers@gmail.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><a href="https://pinout.xyz/" target="_blank">https://pinout.xyz/</a><br></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Dec 1, 2016 at 1:54 PM, Orrin Winton <span dir="ltr"><<a href="mailto:orrin.winton@gmail.com" target="_blank">orrin.winton@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p dir="ltr">Have been running a Pi 2B with the 20m 'hat' on wspr for months. Am getting about 80-90 mW out, which is fine.</p>
<p dir="ltr">Am thinking of seeing what my little HF amplifier can do to boost the signal to a watt or two. Certainly no more than that. (At this point i don't know if 85mW is enough to be boosted by my external amp. I want to try.)</p>
<p dir="ltr">The amp requires PTT keying.</p>
<p dir="ltr">QUESTION:<br>
Does anyone know if one of the unused pins on the Pi header becomes grounded on transmit, to use it as a PTT?</p>
<p dir="ltr">Or becomes +5V to set off a reed relay.</p>
<p dir="ltr">Thanks for any comments.</p>
<p dir="ltr">Orrin WN1Z.<br></p>
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