LTSpice is probably simulating it right. Q2 should have it's emitter and collector lead swapped and R4 should be a jumper. Then you can take out the bypass.
L2 (1 :mu:Hy) is probably the ESL of a 2700 uF capacitor, and not an actual component. 2700 uF sounds like serious overkill. What is the expected frequency?
Thanks mate, I'll get building and good luck with the ballgame
BTW just had an idea about testing the output on the other circuit I made, wondered if I could try a Neon lamp (from an old lighted switch) across the output, but I didn't get a flicker!
LTSpice is probably simulating it right. Q2 should have it's emitter and collector lead swapped and R4 should be a jumper. Then you can take out the bypass.
L2 (1 :mu:Hy) is probably the ESL of a 2700 uF capacitor, and not an actual component. 2700 uF sounds like serious overkill. What is the expected frequency?
I imagine you're right about the inductor; I'm not sure. The target frequency is ~400Hz but the 555 circuit adjusts up and down around that. The 2700uF cap can be quite a bit lower as far as keeping the sim happy goes but I left it alone since I wasn't sure what the original author had in mind for it.
I looked at Tony's page; he definitely used an inductor. As for the capacitor,, I'd be tempted to measure the inductance of the transformer winding and see how it works when you resonate it.
I looked at Tony's page; he definitely used an inductor. As for the capacitor,, I'd be tempted to measure the inductance of the transformer winding and see how it works when you resonate it.
Mmm. Now I just need something which can measure inductance. For the transformer model I just plugged in a 1:10 ratio on the inductances without any real hope that it would be real-life-accurate, hoping that it would be close enough to a 1:10 turns ratio to at least get the voltage output in the right ballpark.
I guess it would be a good idea to at least try to make make sure the output isn't resonating.
Nice! Thanks for the link. It's probably about time I moved up from 8051s anyway. If I decide to (read: get time to) build it I know I'll be buying one of your programmers.