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Dave lists some compatible models above. Current limiting is not found in cheaper supplies and the possibility of relatively simple computer control beats supplies costing several hundred dollars.

It’s false advertising and should 331977 you. The easiest way to control the power supply would be to use a couple pots configured as voltage dividers. At the time I only needed one. Alun Cox Level 3 Expert Answers. It’s worth a thousand words. Kensington has produced several models of “Universal Power Supplies” for use with laptop computers and various other pieces of gear.

They have an “octopus” that will match what kensingtin need and then just be careful to observe polarity when you attach it. More Print this page Share this page.

Kensington 33197 User Manual

San Andreas cheats to this android native device? A diagram showing the pinout of the connector has been added to the article. Constant current supplies are perfect for charging batteries or characterising LEDs.


This shows that good performance can be achieved driving the supply with a DAC signal from a PIC even if it is open loop no feedback is made of the voltage output. HQRP keyboard compatible with These power supplies use a special tip which controls the voltage and current for the connected device. The Impact of Pullup Resistors I do have a couple Microchip 10k digital pots First, I looked manul output voltage vs command voltage.

My favorite is the model watt adapter: I contacted Kensington and they are not much kensintgon I’ve tried this on several models. Kensington makes several model that are very easy to hack. I took a look at performance and I have to say this is pretty sweet.

The output voltage equals 5 times mznual input voltage.

Kensington 33197 Manuals & User Guides

When current exceeds the current limit setting, the current remains constant with the voltage changing as needed to maintain the current.

Next I made a quick measurement of output voltage vs load. I’m happy to say the supply works as expected. Graham’s tutorial shows how to generate 0 – 5 volts using PWM and a filter.


manuap I hope this will be useful to you for your project. You can control output voltage and current with simple v command inputs. As an alternative the USB adapter may be easier fix and even WalMart has one that fits in the cigarette lighter. For a 5 volt output, supply the command input with 1 volt. I used turn pots to allow fine adjustment.


Since the supply is adjustable and the voltage and current are controlled by the small majual adapters, I maanual the process couldn’t be too difficult and I guessed it would be controlled by resistors in the tip.

The manuall address entered is already associated to an account. Kensington supplies are available in a number of models. For a 12 volt output, supply 2. Click “Add” to insert your video. They sell the Kensington, advertised as compatible with XPS when it’s not.

I didn’t mention that this supply also has a 12V DC input, so you could have a variable lab supply in your car. You can sometimes get one cheap on ebay. Any that use the same type adapter tip should operate the same way.

I hope this was useful and please comment if this was helpful to you. I’ve contacted Dell and gave him a good talking too.