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Electronics Lab Bench Setup Guide

badar.tech

191–200 of 274 posts

Re: Electronics Lab Bench Setup Guide

#191

Does anyone have recommendations for a cheap rack mount setup of power supplies, testing equipment etc? We have a 1/3 height wheely rack in the office that can be wheeled over to someone’s workspace, and it would be more convenient than setting up a dedicated station.

Depends on what you consider cheap and how janky you're willing to go. I put together a $350 22U SysRack this week. Not my first choice, tolerances are high, everything is flimsy, but it works on a budget.

As for rack mount power supplies: HP models on ebay or the university auction are usually a decent option.

Re: Electronics Lab Bench Setup Guide

#192

Does anyone have recommendations for a cheap rack mount setup of power supplies, testing equipment etc? We have a 1/3 height wheely rack in the office that can be wheeled over to someone’s workspace, and it would be more convenient than setting up a dedicated station.

Depends on what you consider cheap and how janky you're willing to go. I put together a $350 22U SysRack this week. Not my first choice, tolerances are high, everything is flimsy, but it works on a budget. As for rack mount power supplies: HP models on ebay or the university auction are usually a decent option.

We have a spare StarTech rack like this one:

https://www.mwave.com.au/product/startechcom-19-18u-open-fra...

(It's so solid we've had multiple UPS and Dell PowerEdge in it .. probably hundreds of kgs, not even a small flex. 10/10 from us for the rack)

We're looking for equipment that we can fill it with to convert it to a portable lab, like power supplies and oscilloscopes that will mount to it.

The rack mountable options we found for power supplies, scopes etc were starting at ~2-6k per unit plus like 1k rack mounting kit, but ideally we were looking for max 1.5k or so.

Re: Electronics Lab Bench Setup Guide

#193

I used be an ameteur electronics enthusiast. When I was young, I used to assemble trivial circuits (dancing lights etc.): I could go to an electronics shop. They used to sell hobby kits for simple, accessible, devices. The kit had circuit layout, component list, labels, what goes where and all. I then assembled them per the layout ("this leg of the transistor goes to the left leg of the capacitor"). It worked - I use…

I think there's an in-between that's missing here. Folks who design electronic circuits don't typically compose a circuit directly from the properties of the parts. Instead, there are a lot of slightly higher level design elements, kind of like algorithms in programming, that you combine to make something work. Examples are the many basic op amp circuits, lower level circuits such as transistor gain stages, and so forth. Studying enough of those circuits, you begin to recognize them in schematics, and this gives you a clue as to what the design is doing. I'm not sure that there's a good way around spending a lot of time memorizing those patterns.

There are also simplified operational models of some components such as transistors and op amps.

Assembling kits is a valuable first step, in that it gets your hands working. Being a bit more confident about your construction practices helps when you later try to make your own stuff, because you don't have to wonder if something like a solder joint is working. The more you can trust that your build is modeled by your schematic, the better a chance of locating the place where it isn't. That's your failure point.

I was a physics major in college, but a year of electronics was part of our curriculum. It was taught from The Art of Electronics, first edition. We were also required to buy the National Semiconductor Linear Applications Handbook, and a book on a mainstream IC logic family, which was TTL at the time. That stuff is all available online. I was fascinated with this stuff, so I read the applications handbook from cover to cover. IC application notes are still a good thing to study.

You can take another route. There's gobs of stuff you can do with a microcontroller board and pre-made peripherals such as sensors and actuators. It won't turn you into an analog jock, but it's a legitimate design method and might suit your fancy.

Re: Electronics Lab Bench Setup Guide

#194

Does anyone have recommendations for a cheap rack mount setup of power supplies, testing equipment etc? We have a 1/3 height wheely rack in the office that can be wheeled over to someone’s workspace, and it would be more convenient than setting up a dedicated station.

I’ve never seen rack mount kits for that equipment. Best bet would be to buy some rack shelves and affix standard equipment to it. Get a little horizontal PDU or 2 for the back side and you’re made.

I think this is the most economical option too, thanks. There are some decent rack mount shelves you can buy.

It would not look as aesthetically pleasing or perhaps be as stable as bolted and racked equipment, but the function is the same.

Re: Electronics Lab Bench Setup Guide

#195
post #162

Hakko FX-888D is great and appropriate with the other stuff mentioned (although I prefer the older version with an analogue knob for temperature control), but it's $115 and for most new hobbyists a $25 pinecil or a $25 knockoff Hakko T12 is perfectly adequate and miles ahead of anything you'd find in a home depot for the same price.

The TS100 and TS80 are also good cheap alternatives! One drawback of the Pinecil is that it is solely the iron. You still need to add a power supply, heat-resistant cable, a stand, and a sponge. Not a huge deal, but it is a bit more than $25 to actually start soldering.

Yes but on the other hand, it works with your existing usb-c charger and usb-c battery if you have one. I always reach for my pinecil over my 888 because it is tiny and sits in my pen drawer. When I need it, I just unplug my laptop and plug in the pinecil.

Re: Electronics Lab Bench Setup Guide

#196

Building a workshop in an SF rental studio, http://dammitcoetzee.com/2019/01/a-workshop-in-an-sf-studio/ “I should just build a floor on my floor!” I joked to my friend. “Yea, I could just put some plywood on top of the carpet. Then it would be safe from metal shavings and other workshop mess.” We laughed at the ridiculous idea. However, my subconscious wasn’t laughing. “build a floor on my floor…. build a floor on m…

Good build, not sure why they're making a big deal about the idea, I think it's a pretty normal solution and what a lot of people would do? Makes for more interesting reading at least I guess! A bit more ideal would be to use an ESD dissipative vinyl flooring product on top of the ply and properly ground it, but what they've got is better than carpet and probably fine for most of what you'd do at home I guess.

Re: Electronics Lab Bench Setup Guide

#197

Something isn’t right. You can see the bench surface.

If they're anything like me, they cleaned it up to take the pictures, there's a bunch of junk hiding just off camera, and it will be messy very quickly after! But perhaps they're just that rare breed who actually are just normally this tidy!

Re: Electronics Lab Bench Setup Guide

#198
post #2

Nice setup! In addition to a decent scope I like having a USB logic analyzer. There are lots of cheap ones but Saleae (no affiliation) makes really nice ones.

If you have to make the choice between getting a Saleae logic analyzer and a similarly priced oscilloscope, I think the logic analyzer fits more people's use case than the oscilloscope, because digital electronics and signals are more approachable to hobbyists and novices. If you're primarily concerned with decoding digital communications signals, and inspecting their timing, a logic analyzer is the tool for this job.

Re: Electronics Lab Bench Setup Guide

#199

I used be an ameteur electronics enthusiast. When I was young, I used to assemble trivial circuits (dancing lights etc.): I could go to an electronics shop. They used to sell hobby kits for simple, accessible, devices. The kit had circuit layout, component list, labels, what goes where and all. I then assembled them per the layout ("this leg of the transistor goes to the left leg of the capacitor"). It worked - I use…

In addition to Eevblog and other great resources mentioned, the two things that helped me most with that are the Phil’s Lab YouTube channel and Arlektra educational kit:

- https://m.youtube.com/c/phils94

- https://www.arstemlabs.com/arlektra-mini

Re: Electronics Lab Bench Setup Guide

#200

Earlier quoted context omitted.

As a hobbyist, the transformation for me came when I started using (and then purchased) an oscilloscope. My dad always made me think they were not helpful to hobbyists but nothing about electronics made sense until I could see the electricity. That and calculus-based Physics 2 in college.

Oscilloscopes are insanely attainable now too. You can get a decent basic model for under $100. When I was a teenager, I couldn’t have imagined having access to the level of hobbyist affordable equipment that exists now.

Yeah, and good VNAs for under $100, too!
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