with purpose having graph of motor equivalent R load on time domain in just a single periode of two pulse symbols to simulate SPDT switch 5s for each throw ie. state.
But can’t do simulation because i’m so noob on this using DC analyse. Graph none and informs:
Note: Compatibility modes selected: lt a
Warning: Cannot read 2 nodes in line __sw2
Instance not ready for .probe command
Error: no model type given in line .model __q2!
Error: ngspice.dll cannot recover and awaits to be detached
Are you sure your schematic is correct?
Seems to me that you need to connect the Emitters of Q5 and 6 to some positive rail and the pulse generators to the bases of the transistors.
No, that’s not correct.
Q5 needs a LOW at the same time as Q8 needs a HIGH to turn the current path on.
Q6 needs a LOW at the same time as Q7 needs a HIGH.
So, you need to add two inverters if you want to use only two pulse sources.
Do you want to simulate an H bridge or you actually want to make one? If the latter there are chips for this. If the latter, go back to 4 transistors in a H and work out how to provide the 4 drive signals with the right phase.
Yes, this really isn’t a Kicad issue…
But - you are using PNP transistors at the “upper” end of your H-bridge and NPN transistors at the “lower” side. A PNP is turned on when the Base is pulled low, and an NPN is turned on when the Base is pulled high. In order to get current to flow through your motor (or, R3 in this case), you need to have one upper and one lower transistor on at the same time (and not on the same side of the H!).
