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Wednesday April 13, 2011

New battery for the Promise

Thursday September 23, 2010

FCB-H11 test board arrived

and built. Works flawlessly from the start.

The board offers:
• All analog outputs are brought out on easily accessible BNC sockets
• USB interface to the camera via USB-UART
• µController with 8 buttons and 3 LEDs to operate the camera stand-alone
• Camera reset button
• Stabilized 5V power supply for µController and USB-UART
• 12V surge protection for the camera

4 BNC sockets for Y, Pb, Pr and CVBS:

The small µController of the type Atmega8

This means that we can put our FCB-H11 into operation and work with it for the first time. The controller is also used to port the libvisca to the Atmel and thus operate the camera as a stand-alone device. Later the whole thing will be built into the remote head.

Monday September 13, 2010

"At this point you could really use a controllable camera"

said, developed!

Who does not know this: after long discussions with the organizer and time-consuming laying of cables through the trusses, the camera is finally hanging where it should. But then Murphy comes to visit and suddenly the picture does not fit, or the picture object just jumps out of the picture. In this situation, what would you not give to pan the camera a little. It is not a question of grumbling, but sharpening pencils and running to the virtual drawing board.

But where is the best place to start with a project like this?
At the heart - or better said at the digital eye. After a little research into what the market has to offer, the most suitable model is selected. Data sheets are one of the designer's most important tools, but nothing beats extensive testing to be able to put the components of his choice through their paces.

Fix tinkered a test setup:

A test scenario is created and a suitable location for measuring is controlled.
The fully equipped TV studio at the Institute for Media Technology is of course the ideal place to get a closer look at a camera.

Conclusion of the campaign - the camera module fulfills the expectations and the actual development can go ahead at full throttle.
The following features are planned for the finished remote head:

360 ° freedom of rotation for pan / tilt - hardly any other comparable system offers
HD camera with up to 1080i
completely self-designed and built housing with control electronics

as a little foretaste a few renders of the design
Posted by Matthias Eller in Tooltime at 13:12 | Comments (0) | Trackbacks (0)
Tags for this article: construction, tinkering, broadcast, cyborg, electronics, development, istuff, camera, soldering, project, projects, tooltime

Thursday September 9, 2010

Touch display arrived

Reichelt recently had touch displays from Electronic Assembly on special offer. Due to the better readability in the sun, as stated by the manufacturer, we bought the black and white with orange lighting. Unfortunately, that's exactly what Reichelt doesn't have in touch. But for this you have to pay close attention to the product name.
So ask the manufacturer whether you can retrofit this. Clear answer: Yes, you can. The touch module is simply glued on and soldered to the display board with a 4-pole flexible conductor. Thankfully, Electronic Assembly provided us with such a module for free.

This is what the display looks like with a touch surface (protective film is still on it so that it doesn't get scratched during development).

A demo application from the manufacturer was programmed into the display via RS232.

So I know from which manufacturer I will buy such displays in the future.
Let's see what we can build with it.

Friday July 23, 2010

Sol9 display - finally the parts are there and it can be tested

Tuesday April 6, 2010

Hardly arrived and already dismantled

Yes, that's the way it should be for a (budding) engineer.

Everything is screwed apart first before it goes into operation. This was even planned for the mobile DVB-T and SOL9 video display.

The repeatedly error-prone cinch sockets should be exchanged or supplemented with BNC sockets in order to enable reliable contacting and to avoid the constant use of adapters, because otherwise only BNC is used for the video cabling. It is important to find a suitable place in the housing for this socket.

The display is portable, but there are no more batteries to buy because this model has been discontinued. But we're engineers. Let's build our own battery supply. To do this, the electronics must first be analyzed in order to determine with which operating voltage the display is actually running.

The nameplate shows 10-15V. The included power supply also has an output voltage of 10V.
At the time, I was very impressed by the SWIT monitors that the company with the capital "S" kindly made available to us on the OB van. These monitors can be operated with different camera batteries. We had the model for Canon batteries. Since we already have 3 Canon cameras with lots of batteries, it makes sense to also feed our display with a Canon battery. These batteries deliver 7.4V. Since the electronics most likely run with 5V or even 3.3V, this cannot be that critical. The display also runs wonderfully with this operating voltage.

If it weren't for the backlighting of the TFT.

According to a rudimentary data sheet, this already runs at 6V. In my tests, however, it did not do this reliably. The MP1029EM controller did not swing properly. The data sheet prescribes the use of 2 diodes when using 7V and less as the operating voltage. But that didn't help. Attempts to increase the switching frequency also failed because the data sheet said nothing about the dimensioning of the external circuitry of the controller. The controller did not start properly and it made terrible noises. These noises only disappeared at 10V or more operating voltage.
So there was nothing else left than to provide a higher operating voltage for the background lighting.

A circuit was developed for this. This is quite easy with the help of National Semiconductor's Webbench. Since the Canon battery is a Li-Ion battery, I also integrated an undervoltage shutdown into the circuit so that the battery is not damaged by deep discharge.
All of this is described in detail in the wiki. As soon as the wiki is externally accessible, there will be a link here.

The boards and components have been ordered. As soon as the circuit is set up, there is a new article.
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