| Electronics > Projects, Designs, and Technical Stuff |
| Tripple limited bench PSU ( digital ) from wall adapter |
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| Cliff Matthews:
--- Quote from: tautech on March 21, 2019, 12:39:40 pm --- --- Quote from: Jan Audio on March 20, 2019, 04:26:10 pm ---Looks like i,m spending €500,- --- End quote --- Really ? €370 is enough to get more you than you want. --- End quote --- Ugh! Where's the brutha luv? Man you've been tributing for ages.. now you spam bro? :-DD |
| tautech:
--- Quote from: Cliff Matthews on March 21, 2019, 03:47:52 pm --- --- Quote from: tautech on March 21, 2019, 12:39:40 pm --- --- Quote from: Jan Audio on March 20, 2019, 04:26:10 pm ---Looks like i,m spending €500,- --- End quote --- Really ? €370 is enough to get more you than you want. --- End quote --- Ugh! Where's the brutha luv? Man you've been tributing for ages.. now you spam bro? :-DD --- End quote --- Well it's a lot more than what you think is spam. --- Quote from: Jan Audio on March 19, 2019, 05:56:10 pm ---I,m not doing any 220volt ( i have my reasons ), so i like to use a wall adapter as power source for this adjustable PSU. Here are the specefications i like to build : 0 to 15 volt output on 2 channels 0 to 5 volt output on 1 channel Current limited Accurate measuring ( per 1 milliamp ) Digital control Wall adapter input --- End quote --- These are all basic PSU requirements for all but one: Wall adapter input Yes something could be built on the likes of a laptop power brick until you need -15 volt and +15 volt. Then it get tricky to provide a -15V rail with any sort of current capabilities. Then we have this: --- Quote from: Jan Audio on March 21, 2019, 02:12:29 pm ---This is all hocus pocus to me. --- End quote --- Which might indicate Jan has insufficient understanding to take a project like this on. Don't get me wrong, as a hobbyist I know only too well the value of a good PSU and I've built a couple some years back. The best is 30V 5A capable but without current limiting. Current limiting added another level of complexity that I wasn't prepared to undertake after researching it. So I used a LM338 in TO-3 and relied on the 5-7A foldback limiting. I spent more time and effort building it than what a new off the shelf Siglent costs. Yes I sell these things and those I've sold haven't given one ounce of problems and provide such a range of features that one couldn't possible replicate in a home build for anything like the price they are offered at. So my recommendation for what it's worth as an experienced hobbyist and equipment dealer is the €370 SPD3303X-E and up-hack it to the €509 X model to provide the 1 mV/mA resolution. The info on how to do this is in the Siglent ads thread. These are a good PSU and built like a tank. |
| 2N3055:
On occasion I myself did comment on Tautech's tenacity in promoting Siglent, where I felt he went a bit overzealous .. But in this occasion, I will support him and say that SPD3303X-E is probably best buy for OP... Other one would be Rigol DP831, (more money though), that has 3rd channel that is also fully regulated and settable like (0-8V / 0-5 A). Rigol has Ethernet, and supports programmed ramps, recording of measurements etc.. Also via SCPI, you can read measurements from PC like you would from meter.. I believe SPD3303X-E also has some of those capabilities. I have Rigol DP831 and it works very well.. Both can be easily unlocked to more expensive model with increased resolution and capabilities. Jan, laboratory PSU is not simple project, and by your own estimate and by what knowledge you demonstrated, I think you are not in a position yet to design and make safe and high quality PSU of the type you would like. By all means, make it your learning project, but if you want reliable workhorse PSU you'll have to buy one, either one of the two I mentioned, or maybe and used old brand name one, in which case you might get a broken one that you will have to repair. Regards. |
| Jan Audio:
--- Quote from: 2N3055 on March 21, 2019, 09:19:21 pm ---Other one would be Rigol DP831, (more money though), that has 3rd channel that is also fully regulated and settable like (0-8V / 0-5 A). --- End quote --- WIthout the extra functions, why would you buy the rigol over the itech ? How is the itech/keithly quality then ? I decided for the itech, hope they come with 3 sets of cables when i,m broke. |
| 2N3055:
I don't have one but people that have Itech are quite happy. It is a good PSU. It should serve you well.. |
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