Homebrew PCBs

Ah yes, but have you actually _seen_ the resistors (in a picture or for  
yourself).

'cause, if i rember right, i had a look with a 'scope back than and  
couldn't see anything between the gap of the apparent electrodes.

ST


On Tue, 11 Apr 2006 21:24:01 +0200, Steve <alienrelics@...> wrote:

> Google is your friend.
>
>
> "In a bubble jet printer, tiny resistors create heat, and this heat
>
> vaporizes ink to create a bubble. The expansion that creates the
>
> bubble causes a droplet to form and eject from the print head."
>
>
> "The first of these technologies is called the Thermal Bubble
>
> technology. This technology is very popular and is used by well known
>
> printer manufacturers such as Canon as well as Hewlett Packard and
>
> several others. The thermal bubble technology is more popularly known
>
> as the bubble jet technology. In Ink Jet printers that use the thermal
>
> bubble technology small resistors are used to produce heat. The
>
> purpose of creating this heat is so that it can vaporize the ink in
>
> order to make a bubble. When this created bubble swells up, a specific
>
> amount of the ink is forced out of a nozzle and is put on to the page
>
> that is being printed on. As the bubbles bursts it has the effect of
>
> creating a vacuum. This created vacuum serves a very important purpose
>
> in the over all printing process. The vacuum pulls some more ink from
>
> the ink cartridge and puts it in to the print head."
>
>
> "The thermal drop on demand ink jet technology is very popular. Used
>
> by HP, Canon and others, droplets of ink are forced out of the nozzle
>
> by heating a resistor, which causes an air bubble to expand. When the
>
> bubble collapses, the droplet breaks off and the system returns to its
>
> original state."
>
>
> Steve Greenfield