/usr/share/expeyes/eyes/RLcircuit.py is in expeyes 3.4.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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expEYES program
Author : Ajith Kumar B.P, bpajith@gmail.com
License : GNU GPL version 3
'''
from __future__ import print_function
import gettext
gettext.bindtextdomain("expeyes")
gettext.textdomain('expeyes')
_ = gettext.gettext
from Tkinter import *
import expeyes.eyes as eyes, expeyes.eyeplot as eyeplot, expeyes.eyemath as eyemath, time, math, sys
TIMER = 100
WIDTH = 500 # width of drawing canvas
HEIGHT = 350 # height
VPERDIV = 1.0 # Volts per division, vertical scale
delay = 10 # Time interval between samples
NP = 100 # Number of samples
data = [ [], [] ]
history = [] # Data store
trial = 0 # trial number
data = [ [], [] ] # Current & Voltage
def capture(i):
global data, history, trial
s = ''
if i == 0: # Take OD1 LOW. To HIGH before capture
p.write_outputs(0) # OD1 to LOW
p.enable_set_high(1) # enable for OD1
else: # Take OD1 HI. To HIGH before capture
p.write_outputs(2) # OD1 to HI
p.enable_set_low(1) # enable for OD1
time.sleep(0.5)
t, v = p.capture(0,NP,delay)
g.line(t,v, trial)
data = t,v
history.append(data)
trial += 1
msgwin.config(text = _('Done'))
def fit_curve():
global data
p.write_outputs(2) # Do some DC work to find the resistance of the Inductor
time.sleep(.5)
Rext = float(Res.get())
vtotal = 5.0 # Assume OD1 = 5 volts
v = p.get_voltage(2)
if v > 4.8: # Means user has connected OD1 to A2
vtotal = v
Vind = p.get_voltage(0) # voltage across the Inductor
i = (vtotal - Vind)/Rext
Rind = Vind/i
print (v,Rind)
fa = eyemath.fit_exp(data[0], data[1])
if fa != None:
pa = fa[1]
print (pa)
par1 = abs(1.0 / pa[1])
g.line(data[0],fa[0],1)
dispmsg(_('L/R = %5.3f mSec : Rind = %5.0f Ohm : L = %5.1f mH')%(par1, Rind, (Rext+Rind)*par1))
else:
dispmsg(_('Failed to Fit. Try fitting V=Vo*exp(-tR/L) with Xmgrace'))
def dispmsg(s):
msgwin.config(text=s)
def clear():
global history, trial
g.delete_lines()
history = []
trial = 0
def save():
global history
s = fn.get()
if s == '':
return
p.save(history, s)
msgwin.config(text = _('Data saved to file ')+s)
def xmgrace(): # Send the data to Xmgrace
global history
p.grace(history, _('milliSeconds'), _('Volts'))
def set_timebase(w):
global delay, NP, NC, VPERDIV
divs = [0.050, 0.100, 0.200, 0.500, 1.0, 2.0, 5.0, 10.0, 20.0, 50.0]
msperdiv = divs[int(timebase.get())]
totalusec = int(msperdiv * 1000 * 10)
NP = 100 # Assume 100 samples to start with
delay = int(totalusec/100) # Calculate delay
if delay < 10:
sf = 10/delay
delay = 10
NP = NP/sf
elif delay > 1000:
sf = delay/1000
delay = 1000
NP = NP * sf
g.setWorld(0,-5*VPERDIV, NP * delay * 0.001, 5*VPERDIV,_('mS'),_('V'))
p = eyes.open()
p.loadall_calib()
root = Tk()
Canvas(root, width = WIDTH, height = 5).pack(side=TOP) # Some space at the top
g = eyeplot.graph(root, width=WIDTH, height=HEIGHT) # make plot objects using draw.disp
g.setWorld(0, -5, 20,5,_('V'),_('mA'))
if p == None:
g.text(0, 0,_('EYES Hardware Not Found. Check Connections and restart the program'),1)
root.mainloop()
sys.exit()
cf = Frame(root, width = WIDTH, height = 10)
cf.pack(side=TOP, fill = BOTH, expand = 1)
l = Label(cf, text=_('mS/div'))
l.pack(side=LEFT, anchor = SW )
timebase = Scale(cf,command = set_timebase, orient=HORIZONTAL, length=50, showvalue=False,\
from_ = 0, to=9, resolution=1)
timebase.pack(side=LEFT, anchor = SW)
timebase.set(0)
b = Button(cf,text =_('0 to 5V STEP'), command= lambda i=0:capture(i))
b.pack(side=LEFT, anchor = SW)
b = Button(cf,text =_('5 to 0V STEP'), command= lambda i=1:capture(i))
b.pack(side=LEFT, anchor = SW)
b4 = Button(cf, text = _('CLEAR'), command = clear)
b4.pack(side = LEFT, anchor = N)
b = Button(cf,text =_('Save to'), command=save)
b.pack(side=LEFT, anchor = SW)
fn = Entry(cf,width = 10, bg = 'white')
fn.pack(side=LEFT, anchor = SW)
fn.insert(END,'rl.dat')
cf = Frame(root, width = WIDTH, height = 10)
cf.pack(side=TOP, fill = BOTH, expand = 1)
b = Button(cf,text =_('Xmgrace'), command=xmgrace)
b.pack(side=LEFT, anchor = SW)
l = Label(cf, text=_('Rext='))
l.pack(side=LEFT, anchor = SW)
Res = Entry(cf,width = 10, bg = 'white')
Res.pack(side=LEFT, anchor = SW)
Res.insert(END,'1000')
b = Button(cf,text =_('Calculate R/L'), command=fit_curve)
b.pack(side=LEFT, anchor = SW)
b = Button(cf,text =_('QUIT'), command=sys.exit)
b.pack(side=RIGHT, anchor = SW)
mf = Frame(root) # Message Frame below command frame.
mf.pack(side=TOP)
msgwin = Label(mf,text = '', fg = 'blue')
msgwin.pack(side=LEFT, anchor = S, fill=BOTH)
eyeplot.pop_image('pics/rl-tran.png', _('RL Circuit, Transient'))
root.title(_('Transient response of RL Circuit'))
root.mainloop()
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