KENSINGTON 33197 MANUAL PDF

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Kensington Manuals and User Guides, Adapter Manuals —

I’ve been using a Kensington universal power adapter as a bench power supply for some time. Nice, I always wondered if it was the tips that were adjusting “stuff. I didn’t mention that this supply also has a 12V DC input, so you could have a variable lab supply in your car. Next I made a quick measurement of output voltage vs load. Current limiting is not found in cheaper supplies and the possibility of relatively simple computer control beats supplies costing several hundred dollars.

I used two ten-turn pots I had to test this out, one of 4. If you cut off the output cable you will find these 5 conductors: At the time I only needed one.

When current exceeds the current limit setting, the current remains constant with the voltage changing as needed to maintain the current. Click “Add” to insert your video. Please assign your manual to a product: I’ve contacted Dell and gave him a good talking too.

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In the same boat.

A diagram showing the pinout of the connector has been added to the article. A typical bench supply only puts out 3 amps maximum and would cost a couple hundred dollars. The 5-pin connector on the schematic is to show the conductor colors in the cable. I think it’s a different adapter direct from kensington now, but you can buy them from 3rd parties. Dave lists some compatible models above. The Impact of Pullup Resistors Since the supply is adjustable and the voltage and current are manua, by the small tip adapters, I knew the process couldn’t be too difficult and I guessed it would be controlled by resistors in the tip.

The tip normally determines the output voltage and current limit. I took a look at performance and I have to say this is pretty sweet.

Kensington smart tip N19B – Fixya

For a 5 volt output, supply the command input with 1 volt. Graham’s tutorial kensigton how to generate 0 – 5 volts using PWM and a filter. The hack is the same for all as long as they use the same replaceable tips normally used to adapt to different computers.

Constant current supplies are perfect for charging batteries or characterising LEDs. My favorite is manaul model watt adapter: The output voltage equals 5 times the input voltage. I do have a couple Microchip 10k digital pots I contacted Kensington and they are not much help The easiest way to control the power supply would be to use a couple pots configured as voltage dividers.

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It may surprise you that one of these power supplies can make an excellent bench power supply, with voltage adjustable from 0 – 24 volts at up to 6 amps.

Kensinton awesome performance but not bad considering the cost. You can’t post conmments that contain an email address. These power supplies use a special tip which controls the voltage and current for the connected device.

Kensington 33197 Manuals & User Guides

The email address entered is already associated to an account. Not finding what you are looking for? Using one of these Kensington supplies as a bench power supply is definitely viable.

First, I looked at output voltage vs command voltage. I’ll map the connector pinout when I have a chance. More Print this page Share this page. You can sometimes get one cheap on ebay. The next enhancement would be to control the voltage and current limits with a micro. Thanks goes out to Dave, who wrote:. Tell us some more! The measurements shown were made with a load of about mA.

It’s worth a thousand words. I hope this will be useful to you for your project. It’s false advertising and should refund you.