So I'm still pretty new to the Raspberry Pi community and I've only been playing around with small things, using other people's scripts and guides. One of the more recent projects I tried out was using the GPIO Pin 4 as an FM transmitter. I know there are many other posts about this, but I can't find any about whether the process is safe.
I am running the standard Raspbian Wheezy and the script I am following is from: http://www.icrobotics.co.uk/wiki/index. ... ransmitter
My concern is that when I first tested out the script, transmitting at 100MHz, my Pi started overheating for the first time. It would have been about 5 minutes of transmitting before I realised that my Pi was too hot and needed to be shut down. I repeated the progress, this time with a temp monitor but couldn't recreate the overheating (thankfully).
I'm now curious to know whether 100MHz is too high of a frequency for the CPU to handle? I read on a GPIO sheet (https://www.modmypi.com/blog/raspberry- ... heat-sheet) that the max frequency for Pin 4 is approximately 75MHz, however I have seen many other Pi users tinkering with theirs at 100MHz and higher - so I am unsure on whether this is safe or not. Can anyone confirm or deny my queries?