## Introduction

gold Here is some TCL calculations for the burn-in acceleration factor in electronics testing. Most of the testcases involve replicas or models, using assumptions and rules of thumb.

### Pseudocode and Equations

```  price? = raw materials + labor  +  profit
price? = raw materials + heat process
price? = raw materials + labor
average price per unit  = revenue  / units sold```

### Testcases Section

In planning any software, it is advisable to gather a number of testcases to check the results of the program. The math for the testcases can be checked by pasting statements in the TCL console. Aside from the TCL calculator display, when one presses the report button on the calculator, one will have console show access to the capacity functions (subroutines).

#### Testcase 1

table 1printed in tcl format
quantity value comment, if any
testcase number:1
150.0 :test hours
0.4 :electron volt (silicon=.4)
30.0 :temperature acceleration factor
150.0 :test at higher temperature hours
2929.05289702299 :effective hours

#### Testcase 2

table 2printed in tcl format
quantity value comment, if any
testcase number:2
300.0 :test hours
0.4 :electron volt (silicon=.4)
30.0 :temperature acceleration factor
300. :test at higher temperature hours
9343. :effective hours

#### Testcase 3

table 3printed in tcl format
quantity value comment, if any
testcase number:3
300.0 :test hours
0.4 :electron volt (silicon=.4)
30.0 :temperature acceleration factor
300.0 :test at higher temperature hours
9343.54850428406 :effective hours

• Stat

## Appendix Code

### appendix TCL programs and scripts

```        # pretty print from autoindent and ased editor
# burn in acceleration calculator
# written on Windows XP on eTCL
# working under TCL version 8.5.6 and eTCL 1.0.1
# gold on TCL Club, 15oct2014
# comment follows from gold, dated 12Dec2018
# pretty print from autoindent and ased editor
# burn in acceleration calculator V2
# written on Windows XP on TCL
# working under TCL version 8.6
# Revamping older program from 15Jan2014.
# One of my early TCL programs on wiki,
# but I believe the burn_in equations
# might have some interest (to me).
package require Tk
namespace path {::tcl::mathop ::tcl::mathfunc}
frame .frame -relief flat -bg aquamarine4
pack .frame -side top -fill y -anchor center
set names {{} {test hours:} }
lappend names {normal operating temperature centigrade :}
lappend names {higher test temperature centigrade: }
lappend names {semiconductor activation energy, electron volt (default silicon=0.4) :}
lappend names {answers: temperature acceleration factor :}
lappend names {temperature acceleration factor: }
lappend names {test at higher temperature hours : }
lappend names {effective hours :}
foreach i {1 2 3 4 5 6 7 8} {
label .frame.label\$i -text [lindex \$names \$i] -anchor e
entry .frame.entry\$i -width 35 -textvariable side\$i
set msg "Calculator for Burn In Acceleration calculator
from TCL WIKI,
gold on TCL Club, 12Dec2018 "
tk_messageBox -title "About" -message \$msg }
proc self_help {} {
set msg " Burn-in Acceleration Factor V2
from TCL ,
# self help listing
# problem, Burn-in Acceleration Factor V2
# 4 givens follow.
1) test hours:
4) activation energy, electron volts (silicon=.4):
# semiconductor activation energy, .1<ev<5 norm.
# activation entries outside boundaries .1<ev<5.
# are defaulted to (silicon=0.4).
# Recommended procedure is push testcase
# and fill frame,
# change first three entries etc, push solve,
# and then push report.
# Report allows copy and paste
# from console to conventional texteditor.
# For testcases, testcase number is internal
# to the calculator and will not be printed
# until the report button is pushed
# for the current result numbers.
# This posting, screenshots, and TCL source code is
# Editorial rights and disclaimers
# retained under the TCL/TK license terms
# and will be defended as necessary in court.
Conventional text editor formulas
or  formulas grabbed from internet
screens can be pasted into green console.
# gold on  TCL Club, 12Dec2018 "
tk_messageBox -title "Self_Help" -message \$msg }
proc calculate {     } {
global side1 side2 side3 side4 side5
global side6 side7 side8
global testcase_number
global activation_default
incr testcase_number
set side1 [* \$side1 1. ]
set side2 [* \$side2 1. ]
set side3 [* \$side3 1. ]
set side4 [* \$side4 1. ]
set side5 [* \$side5 1. ]
set side6 [* \$side6 1. ]
set side7 [* \$side7 1. ]
set side8 [* \$side8 1. ]
set activation_default 0
set test_time \$side1
set tempkelvin1 [+ \$side2 273. ]
set tempkelvin2 [+ \$side3 273. ]
set electron_volt \$side4
if {  \$electron_volt < .1 ||  \$electron_volt > 4. } { set activation_default 1 }
if {  \$electron_volt < .1 ||  \$electron_volt > 4. } { set electron_volt 0.4 }
set boltzman_constant 0.000086
set term2 [- [/ 1. \$tempkelvin1 ] [/ 1. \$tempkelvin2 ] ]
set term3 [* \$electron_volt \$term2 ]
set term4 [/ \$term3 \$boltzman_constant ]
set acceleration_factor [exp \$term4 ]
set \$side5 \$acceleration_factor
set \$side6 \$acceleration_factor
set side7 \$test_time
set effective_burn [* \$test_time \$acceleration_factor 1. ]
set side8 \$effective_burn
}
proc fillup {aa bb cc dd ee ff gg hh} {
.frame.entry1 insert 0 "\$aa"
.frame.entry2 insert 0 "\$bb"
.frame.entry3 insert 0 "\$cc"
.frame.entry4 insert 0 "\$dd"
.frame.entry5 insert 0 "\$ee"
.frame.entry6 insert 0 "\$ff"
.frame.entry7 insert 0 "\$gg"
.frame.entry8 insert 0 "\$hh"
}
proc clearx {} {
foreach i {1 2 3 4 5 6 7 8 } {
.frame.entry\$i delete 0 end } }
proc reportx {} {
global side1 side2 side3 side4 side5
global side6 side7 side8
global testcase_number
global activation_default
console eval {.console config -bg palegreen}
console eval {.console config -font {fixed 20 bold}}
console eval {wm geometry . 40x20}
console eval {wm title . " Burn-in Acceleration Factor, screen grab and paste from console 2 to texteditor"}
console eval {. configure -background orange -highlightcolor brown -relief raised -border 30}
console show;
puts "%|table \$testcase_number|printed in| tcl  format|% "
puts "&| quantity| value| comment, if any|& "
puts "&| testcase number:|\$testcase_number | |&"
puts "&| \$side1 :|test hours|   |&"
puts "&| \$side2 :|normal operating temperature centigrade | |& "
puts "&| \$side3 :|higher test temperature centigrade | |& "
puts "&| \$side4 :|semiconductor activation energy, electron volt (default silicon=0.4) |  |&"
puts "&| \$side5 :|answers: temperature acceleration factor |  |&"
puts "&| \$activation_default :| activation_default logic active,  0 off or 1 defaulted | check semiconductor activation energy on logic 1  |&"
puts "&| \$side6 :|temperature acceleration factor| |& "
puts "&| \$side7 :|test at higher temperature hours|  |&"
puts "&| \$side8 :|effective hours |  |&"
}
frame .buttons -bg aquamarine4
::ttk::button .calculator -text "Solve" -command { calculate   }
::ttk::button .test2 -text "Testcase1" -command {clearx;fillup 150.0 60.0 150.0 0.4  30.0 30.0 150. 2929.}
::ttk::button .test3 -text "Testcase2" -command {clearx;fillup 200.0 60.0 180.0 0.4  30.0 30.0 200. 8089.}
::ttk::button .test4 -text "Testcase3" -command {clearx;fillup 300.0 55.0 160.0 0.4  30.0 30.0 300. 9343.}
::ttk::button .clearallx -text clear -command {clearx }
::ttk::button .self_help -text self_help -command { self_help }
::ttk::button .cons -text report -command { reportx }
::ttk::button .exit -text exit -command {exit}
pack  .clearallx .cons .self_help  .about .exit .test4 .test3 .test2   -side bottom -in .buttons
grid .frame .buttons -sticky ns -pady {0 10}
. configure -background aquamarine4 -highlightcolor brown -relief raised -border 30
wm title . "Burn-in Acceleration Factor Calculator "
```

### Pushbutton Operation

For the push buttons, the recommended procedure is push testcase and fill frame, change first three entries etc, push solve, and then push report. Report allows copy and paste from console.

For testcases in a computer session, the eTCL calculator increments a new testcase number internally, eg. TC(1), TC(2) , TC(3) , TC(N). The testcase number is internal to the calculator and will not be printed until the report button is pushed for the current result numbers. The current result numbers will be cleared on the next solve button. The command { calculate; reportx } or { calculate ; reportx; clearx } can be added or changed to report automatically. Another wrinkle would be to print out the current text, delimiters, and numbers in a TCL wiki style table as

```  puts " %| testcase \$testcase_number | value| units |comment |%"
puts " &| volume| \$volume| cubic meters |based on length \$side1 and width \$side2   |&"  ```