My first simulation is not working
1803 3
yunuzk 4 years ago
Hi, i tried build a 555 timer, run the simulation, the result: Circuit: gooduntitled Doing analysis at TEMP = 27.000000 and TNOM = 27.000000 Warning: singular matrix: check nodes volprobe1 and volprobe1 Note: Starting dynamic gmin stepping Note: One successful gmin step Note: One successful gmin step Note: One successful gmin step Note: One successful gmin step Note: One successful gmin step Note: One successful gmin step Note: One successful gmin step Note: One successful gmin step Note: One successful gmin step Note: One successful gmin step Note: One successful gmin step Warning: singular matrix: check nodes u1_3 and u1_3 Warning: Dynamic gmin stepping failed Note: Starting source stepping Warning: singular matrix: check nodes u1_3 and u1_3 Note: One successful gmin step Note: One successful gmin step Note: One successful gmin step Note: One successful gmin step Note: One successful gmin step Note: One successful gmin step Note: One successful gmin step Note: One successful gmin step Note: One successful gmin step Note: One successful gmin step Note: One successful gmin step Note: One successful source step Warning: singular matrix: check nodes u1_3 and u1_3 Warning: singular matrix: check nodes u1_3 and u1_3 Warning: source stepping failed Transient solution failed - Last Node Voltages ------------------ Node Last Voltage Previous Iter ---- ------------ ------------- xr3_1 -1.53627e-37 0 d2_1 -1.02655e-37 0 xr3_3 -2.01284e-39 0 v1_1 0 0 u1_3 0 0 volprobe1 0 0 r2_1 -1.54646e-37 -5.59605e-38 gnd 0 0 d1_1 1.00627e-30 5.59605e-38 u1_5 0 0 led1#branch 0 0 v1#branch -2.01284e-42 0 doAnalyses: iteration limit reached tran simulation(s) aborted Error(parse.c--checkvalid): volprobe1: no such vector. ngspice-26 done
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andyfierman 4 years ago
Please make your project public and post the project URL here. Please also see: https://easyeda.com/forum/topic/How_to_find_simulatable_parts_and_run_a_simulation_in_EasyEDA-1YgasK2kC Thanks.
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yunuzk 4 years ago
https://easyeda.com/yunuzk/New_Project-AQmgyQ82k
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andyfierman 4 years ago
The problem is that you have used schematic symbols for the 555 timer and the diodes that do not have simulation models associated with them. The link above will help you find suitable symbols. You will also have to configure the 12V supply as a Pulse Source to kick start the 555 timer.
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