Simulating 555 based astable multivibrator
Hello Madam/Sir
Am getting run time error while simulating 555 based astable multivibrator. Have tried best, am not able to resolve the error. Have verified the simple ckt simulation in LT Spice, and apparently it works. Please do help in resolving the doubt. Am attaching herewith in-line the .out file

* c:\\users\\prasad.joshi\\esim-workspace\\astable555\\astable555.cir

.include lm555n.sub

* u2 net-_c1-pad1_ ic

.ic v(net-_c1-pad1_)=0

x1 gnd net-_c1-pad1_ net-_r3-pad1_ net-_r1-pad1_ net-_c2-pad1_ net-_c1-pad1_ net-_r1-pad2_ net-_r1-pad1_ lm555n

r2 net-_r1-pad2_ net-_c1-pad1_ 10k

r1 net-_r1-pad1_ net-_r1-pad2_ 1k

c1 net-_c1-pad1_ gnd 1u

c2 net-_c2-pad1_ gnd 0.01u

r3 net-_r3-pad1_ gnd 1k

* u1 net-_r3-pad1_ plot_v1

v1 net-_r1-pad1_ gnd dc 5

* u2 net-_c1-pad1_ ic

.tran 5e-03 4e-03 0e-00

* Control Statements

.control

run

print allv > plot_data_v.txt

print alli > plot_data_i.txt

plot v(net-_r3-pad1_)

.endc

.end

error reported is:

doAnalyses: iteration limit reached

run simulation(s) aborted

Error(parse.c--checkvalid): net: no such vector.

Error(parse.c--checkvalid): a.x1.a3#branch_1_0: no such vector.

Error: bad v() syntax

ngspice 1 ->

Interrupted once . . .

Warning: clearing control structures

ngspice 1 ->

Thanks indeed

regards

eSim Simulating-an-Astable-Multivibrator 00-01 min 0-10 sec 19-11-19, 11:38 a.m. prasadjoshee

#### Answers:

The step time and stop time need to be comparable, one example can be seen here : https://github.com/FOSSEE/eSim/blob/master/Examples/Astable555/Astable555.cir.out
28-04-20, 10:19 p.m. Saurabhb17

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