[EDIT] This product is now available on Tindie.
Normal if I’m doing a scratch ‘n sniff on a product I bought it myself because it was something I was interested in adding to a project. Truth be told I got this one for free; I won this board off a contest on twitter. So I don’t have any projects this thing is running on or slated for but I can tell if I need something with a bunch of IO, like perhaps a display this will be the board I use. I have a project list and nothing really fits, but that future project list is always growing and shrinking. If you’re curious I have 38 projects on the list in progress or to-be-started 😀 I have a spreadsheet to manage them all on google drive or I’m sure I’d forget half of them. Sorry, I know blah blah… back to what you’re here for…
I unpacked the board and soldered it all together. Not a lot to say about it because it’s just a board, four DIP sockets/74HC595’s a couple connectors and 3 resistors. I like that they included sockets; I would have added them myself but sockets is a must on hobbyist boards!
whixr also send me some test code … happy day.
So I hooked this up and dropped code into it last week.. I left it to burn in all week.. and checked it out today; no problems. I put the Pi on bench and hooked up my logic analyzer … works as advertised. Look at the screenshot of the output for how whixr code works. I’ll also include a copy.
I don’t know when they plan on releasing this product but I’m sure it’ll be on their Tindie store page sooner than later. I also know that tymkrs wouldn’t mind donations for their educational work
I could only find one insignificant thing I didn’t like; there is a little ringing on the output of the 74HC595’s.. I did my due-diligence to ensure this wasn’t a false measurement. No biggie, a little load killed the ringing…
I say kudos to the tymkrs for this great product!
the code!
# MorePi Me v1 Demo by @tymkrs
def update():
for index in range(0, 32):
if state[32 - index]:
GPIO.output(DataPin, GPIO.HIGH)
else:
GPIO.output(DataPin, GPIO.LOW)
GPIO.output(ClockPin, GPIO.HIGH)
GPIO.output(ClockPin, GPIO.LOW)
GPIO.output(LatchPin, GPIO.HIGH)
GPIO.output(LatchPin, GPIO.LOW)
def clear():
for index in range(0, 32):
state[index] = False
state = [False for index in range(33)]
LatchPin = 11
ClockPin = 13
DataPin = 15
import time
import RPi.GPIO as GPIO
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BOARD)
GPIO.setup(LatchPin, GPIO.OUT) #latch
GPIO.setup(ClockPin, GPIO.OUT) #clock
GPIO.setup(DataPin, GPIO.OUT) #data
while True:
for n in range(0, 8):
clear()
state[n + 1] = True
update()
time.sleep(.03)
for n in range(0, 8):
clear()
state[8 - n] = True
update()
time.sleep(.03)
