Software signal generator ...

[poynt99]

Using a 2N3055 alone to make an audio amplifier would be a tricky proposition (esp. for those not familiar with discrete analog design), which is why I mentioned that it would not be easy.

Unless I don't understand your requirements, going with an amp module (similar to above) is a far better solution imo.

.99

[DeepCut]

Thanks mark and poynt, perhaps an audio amp is the way to go i'm not sure.

All i want to do is pulse a coil from my PSU, using the software signal generator as a trigger.

This is exactly what Bedini's SSG circuit does except the magnets are the trigger, inducing a voltage into the trigger wire that allows the power to flow from the PSU.

I will try an amplifier today i have a little PC one somewhere.

Thanks again for the help,

Gary.

[poynt99]

Thanks mark and poynt, perhaps an audio amp is the way to go i'm not sure.

All i want to do is pulse a coil from my PSU, using the software signal generator as a trigger.

This is exactly what Bedini's SSG circuit does except the magnets are the trigger, inducing a voltage into the trigger wire that allows the power to flow from the PSU.

I will try an amplifier today i have a little PC one somewhere.

Thanks again for the help,

Gary.

OK, now I think I understand. That is a bit different. I thought you wanted to amplify analog signals, but a trigger is what you are really after. The amplifier module will probably still work for this purpose, but use it to drive your 2N3055.

All you really need is to amplify the current drive to the 2N3055, and for this you could use a 2N3904 in front of it as a Darlington pair. This will still allow you to power off your supply and pulse the coil as required. Fairly simple.

If you understand great, if not let me know and I can draw something up.

.99

[DeepCut]

Thanks a lot poynt, i'm off to maplins to grab a 3904.

If you have the time i'd really appreciate if you could draw something up, i've googled darlington pair but i'm not so sure about the overall circuit.

Yesterday i was playing with a 3055 and couldn't even get a CE output voltage with 9V at the base ? Maybe i don't understand transistors properly yet, i'm fairly new to this and still learning.

Thanks again,

Gary.

[DeepCut]

Damn !

Two branches of my electronics store and both out of 3904's

I've got two 3055's, gonna give it a try with those.


Gary.