Caiman Mods

[lovejoy]

Hmmm, those are going to wait until after Christmas ;-).

For anyone wanting a slightly cheaper upgrade, I can confirm that replacing the 7805 with an LM340T5 (I picked one up from Ebay for 99p + £1.50 postage) as a drop in replacement is most definitely an improvement.

[chrism]

Looks great Stan.

Just wondered what the "design" setting is for each of the regs (voltage and current). Is there any other way of doing the internal regulation other than by using switching types? for instance, if an external linear supply had it's own capacitor and tracking regulator controling 5v would the internal one be needed.

Chris

[StanleyB]

I am trying to concentrate on mods that are possible to carry out by any reasonably skilled person with electronics soldering experience.
Modifying the power supply to that extent is outside the scope of what I would consider reasonable safe to carry out.

[chrism]

No worries Stan.

Regards

Chris

[therockst4r]

I am trying to concentrate on mods that are possible to carry out by any reasonably skilled person with electronics soldering experience.
Modifying the power supply to that extent is outside the scope of what I would consider reasonable safe to carry out.

I tend to agree with you here, and I am very interested in what mods you are doing. Please keep us posted.

[chrism]

Hi Stan,

Thanks for the Mouser link. The prices appear to be £8.15 plus VAT and I am wondering if I am looking at the wrong page as you suggested that they are more than this?

Thinking about ordering a 7805 SR-C and 7812 SR-C but just wanted to make sure I am not looking at the wrong ones. Also they only do 0.5a and 0.4a and I noticed that the original ones do 1a.

Can we safely leave the heat sinks off them?

Regards

Chris

[StanleyB]

I ordered mine from Farnell, who turned out to be far more expensive. See HERE. I published the link to a cheaper source for the benefit of AoS members, so that others would not incur the same unreasonable higher price.

[chrism]

Hi Stan,

Spotted these little chaps on ebay. Quite cheap for what they are but may be tricky squeezing them into the Caiman.

Could sound like poo though.

Regards

Chris


http://cgi.ebay.co.uk/ws/eBayISAPI.d...%3DI%26otn%3D2

[StanleyB]

I wouldn't bother. The Caiman already has a similar circuit. The Murata etc. are far more worthwhile of an improvement. Try to get Leo to show the one he has running in his Caiman. It's far superior to the one on eBay.

[chrism]

Hi Stan,

Thanks again for your advice.

Regards

Chris