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Handheld Precision Digital Voltage Source

CSI Bench Psu CC Mode Kit
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CSI Bench Psu CC Mode Kit

Price: £24.99

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A complete kit to convert CSI 3000 series (and compatible) bench power supplies to off-load CC (constant current) adjustable setting.

The standard functionality of these Power Supplies is that the user cannot change the CC (constant current) setting without actually running at load, which makes it impossible to preset a control current.

This easy to fit kit allows the user to use the existing front panel buttons (UP/DOWN) to change the CC setting at any time on the LCD, on or off load.

All the parts are supplied to retro fit this kit to your own power supply and include:

  • Fully assembled & tested Pcb (from my own workshop).
  • Plastic standoffs.
  • Connectors & solder tails.
  • On-board LED provides functional status.

Tested with my own CSI3003X5 & CSI3005XIII power supplies, but may possibly be used (subject to your testing) in other CSI and other similar branded power supplies.
I have had a few reports from people that there are quite a few other branded PSU's out there that use the same internals as the CSI range, so if your PSU has the almost identical look and feel of the front panel as mine then chances are this kit will work. If in doubt check out my video where you will see the internals in detail.

UPDATE: I've been more than surprised at the amount of brands that use the same internals, even the 0-120VDC versions I have confirmed work with my kit. So, the reality seems to be that if your power supply has a front panel identical to that of either power supply pictured below then there is a very good chance my kit will work.


Note: Dual channel CSI power supplies, such as the CSI3005XIII require two kits, one per channel.

The kit is fitted simply by snapping it onto plastic standoffs (existing holes within the PSU) and plugging it in. All thats then required is just the soldering of three wires to specific points on the existing control board inside the PSU.
No drilling of any holes, no cutting of any wiring or Pcb traces etc is necessary. I've made this as easy as possible to install. See the video & photos below which provide all the necessary info for installation.

The kit does not require any calibration (on the above power supplies anyway).

The kit provides a current setting of between roughly 50mA and the full range current of the actual power supply (usually 3A or 5A depending on model).

Additional info:

  • TR1 potentiometer - Adjusts full scale of CC set display. Normally set to fully clockwise.
  • JP1 jumper - To manually set LCD to display CC Mode Set. This is for testing only.
  • Each one tested with my own CSI3003X5.
  • Please refer to the YouTube video here for full installation instructions. No written instructions are shipped with the kit, it's all in the video.
  • This kit involves opening up your PSU and making some light modifications. It may invalidate your warranty.
  • As featured on Hackaday !

Pcb's now being shipped are V1.11 and include a new op-amp for better low end CC setting performance and better accuracy, however, due to the CSI CC 'step' setting and performance of the CSI power supplies this kit may not be 100% accurate at settings of less than 50mA, and also, the kit does add in extra wiring and semiconductors in series with the CSI control signals so 100% accuracy of the set CC current is not guaranteed. I have found it varies between different power supplies.

Electronics can be dangerous, so if you are not experienced or have any doubts at all then ask somebody who is to help you fit this kit. You can also email me via the contact form on this site in advance of your purchase if you have doubts. Again, electronics can be dangerous so please take care.
I have designed this kit and tested with my own CSI3003X5 & CSI3005XIII power supplies, but I cannot be responsible for any changes CSI have made between models and any incompatibilities that may result. I also cannot guarantee that other CSI like power supplies will work.

Here's a video detailing the installation in full - http://youtu.be/KCZl3jnqxAw

And some photos (Pcb V1.11):

IMG 1733


IMG 1735


Close-up of the PSU control board showing the positions of the 3 wires to be soldered up:



In Stock: 10

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Customer Reviews:

Alain  (Monday, 14 September 2015)
Rating: 5
Very nice upgrade for this PS ... Easy install ans works great !rnBTW, works also on the 0-120V (1A) PS of the same brand !

CrouchyUK  (Saturday, 05 April 2014)
Rating: 5
Superb solution! Makes you wonder why it never came like this to start with TBH. Thanks again!

briant33  (Saturday, 08 February 2014)
Rating: 5
Neat little upgrade! Easy to install and works great.

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