Few QuickStart board specific questions,
rwgast_logicdesign
Posts: 1,464
So basically i started out running home made prop boards, but recently have blown up a few wal warts!! I bought a quick start a while back then won another one the other from propeller powered (thanks you jeff!!). I like them becuase I can fit them in an altoids tin along with a usb cable jumper wire a blue tooth serial dongle and a few other things. Makes a great little kit for when im away from home!
Anyways ive just recently started using these quick starts on my desk becuase, well I am just to cheap to go buy another universal wal wart, and i dont wanna hack the ends off any I have laying around. One of the projects im doing acually happens to only need 8 led's and 8 buttons too so this board is super perfect for that leaves me free to build more important things!
As long as im around a PC and dont need to OC the prop I love these little guys. BUT there is something driving me insane!!!!!!! The blue leds!! If I dont need them is there an easy way to disable them?!!! I need to use a few of the pins there attached too as outputs so obviously thats gonna flip them on, but for some reason they turn on when i just insert a piece of jumper wire into the header with the pin in hi-z, whats that all about??
I also just have a few questions about the board itself. There is a patch of through holes labeled with greek letters, im assuming that they are sigma/delta, the triangle and the e thing. What exactly would you solder there, and what are all the surface mount pads above those holes for? They obviously all dont turn brown out on and off? Last thing is inbetween the LEDs and chip there are two resistor networks, but between the resistors and prop there is a 74hc541, I thought these were primarly used to translate 5/3.3vs what the function of the hc541 on the quickstart board?
Anyways ive just recently started using these quick starts on my desk becuase, well I am just to cheap to go buy another universal wal wart, and i dont wanna hack the ends off any I have laying around. One of the projects im doing acually happens to only need 8 led's and 8 buttons too so this board is super perfect for that leaves me free to build more important things!
As long as im around a PC and dont need to OC the prop I love these little guys. BUT there is something driving me insane!!!!!!! The blue leds!! If I dont need them is there an easy way to disable them?!!! I need to use a few of the pins there attached too as outputs so obviously thats gonna flip them on, but for some reason they turn on when i just insert a piece of jumper wire into the header with the pin in hi-z, whats that all about??
I also just have a few questions about the board itself. There is a patch of through holes labeled with greek letters, im assuming that they are sigma/delta, the triangle and the e thing. What exactly would you solder there, and what are all the surface mount pads above those holes for? They obviously all dont turn brown out on and off? Last thing is inbetween the LEDs and chip there are two resistor networks, but between the resistors and prop there is a 74hc541, I thought these were primarly used to translate 5/3.3vs what the function of the hc541 on the quickstart board?
Comments
The extra pads are indeed for the optional sigma-delta circuit as seen in the diagrams.
There is also an option to move R12 so that the BOE pin connects to Vdd=<brownout-disabled> instead of the default, which is Vss=<brownout-enabled>.