user TURBO?s replication of Steven Mark?s TPU ?

[AhuraMazda]

Ok, once you have your 3 frequencies exactly where would you apply them?

AM

[PaulLowrance]

I have examined Turbo's system as humanly possible given the dire quality of the videographer.

Hi wattsup,

There are at least two methods getting more detail.

First method works great under certain conditions, but is merely bring out detail. Go into Adobe Photoshop, load the image, click "Filter", click "Sharpen", then make selection.

Second method takes a long time, but is far better. Take as many frames of the same angle as possible. Meticulously align each frame. Then you must use a special computer program that takes all the frames and creates one final frame. To understand why this technique works simply look through a mess screen. You'll see it's difficult to clearly see everything because of the mess. Now move the screen while looking at the object and you'll be able to clearly see the object.  I'll refer to this technique as the "Screen Effect."


Regards,
Paul Lowrance

[MeggerMan]

Hi Dave,

There are a whole host of PWM chips that Texas instruments do that are far in advance of even the TL494.
Most of the new chips with totem pole outputs able to drive a MOSFET very hard at around 1.5 to 2 amps at the gate.
The big advantage here is you do not need a pull-up or pull-down resistor on the MOSFET gate which use up valuable power.

Farnell in one have a good range of these chips but not all of them.

There are also single output chips which are more suited to this project.
Speeds up to 4Mhz

http://focus.ti.com/paramsearch/docs/parametricsearch.tsp?family=analog&familyId=662&uiTemplateId=NODE_STRY_PGE_T

UC2842 will go to 500Khz and up to 1A output current.

I do have all the PCB making equipment but it is a bit messy and drilling the holes is quite time consuming, but it can be done.

Regards

Rob

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[lltfdaniel1]

thanks for info about this tpu of yours dave.