For any beginners out there, here's a list of tools and equipment I have found to be important when building a personal prototyping laboratory, along with some of the mistakes I've made along the way.
When I first started to become involved with electronics, I realized that it would be important to invest in a set of tools that would help me build my projects. However, I had lots of questions about which tools to purchase and -- since I was on a limited budget -- which pieces of equipment should I acquire first.
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So, for any beginners out there, the following is my list in order of what I have found to be important along with some of the mistakes I've made along the way:
A location: I would recommend first finding a place where you can put all your tools in a somewhat organized fashion. For quite some time, I made the mistake of trying to have things here and there around the house. I found that I would frequently misplace things and -- instead of spending time working on a project -- I would spend time looking for the tool that I needed. The location in your house does not need to be big, but should be a dedicated space.
A desk or a workbench: This is a fantastic addition. It does not need to be fancy -- it's a place to leave your projects in between your working sessions. I started out with a small card table that was approximately $30 from Walmart. I later upgraded to this workbench from Harbor Freight. (Actually, there are few Harbor Freight items that I would recommend, but this is one of them.) It has four integrated drawers and a hardwood top. I got it on sale for $106 delivered to my door, and it has proved to be a great upgrade.
A computer: How would you perform tasks like programming and PCB layout without a computer? This item is a must. It does not need to be dedicated to electronics design, but you can pick up a cheap laptop or desktop for around $300.
A breadboard: I personally have a very nice integrated breadboard that I was able to pick up for a very reasonable price (approximately $35) from eBay. This is the predecessor to the Global Specialties PB505. As you can tell, I got it for quite the discount. All I needed to do was repair a damaged potentiometer to get my eBay special working.
A soldering iron: I am not talking about one of those $10 Radio Shack "fire starters," but a real, temperature-controlled soldering iron. There are a lot of options out there (including this open-source device), but I would recommend saving up your pennies and getting a combination hot air rework station as well as soldering iron. I purchased the Aoyue 968, which has since been upgraded to the 968 A+. It was about $160 at the time. In fact, I have used the hot air rework station for reflowing my boards more than I have used the soldering iron side. This truly has been a workhorse in my lab.
Logic Analyzer: Diagnostic tools are a must. Before the oscilloscope, I would purchase a logic analyzer. I purchased the open source Open Bench Logic Sniffer for $50 and it has served me well. This tool has been great to be able to see if I am actually communicating what I want over my serial communication lines.
Oscilloscope: Once you have acquired all of the tools noted above, it really is well worth getting an oscilloscope. An oscilloscope is great for looking at issues that are harder to diagnose. It can help you identify issues with a serial communications signal, DAC outputs, and many other areas. The biggest problem is that there are so many choices -- where does one start?
Do you go for analog or digital? Will a $200, 10MHz USB scope do what you want it to do? For a starter oscilloscope, I would say that you can get what you need for 50 to $200. I was able to get an analog, 4-channel, 300MHz, Tek 2465 with two probes for $200. I had to do some eBay shopping to find it, but it has proved to be a very good scope for the money. Right now, I am looking to add a digital scope to my tool kit. For that one, I am looking at the Rigol DS2000 series. The nice thing about this series is that they have a gradient weighted display that makes the screen display the signals in a very similar manner as an analog scope. But they run 800 to $1600, so I am going to have to save up for this item.
Power Supply: All of the above and no power supply? Until now, I've been able to get by with simple "wall warts" and breadboard power supplies that had fixed voltages. I finally was given a dedicated, bench-top power supply by a friend. This power supply is an old analog, dual-output supply that can regulate both voltage and current. This may not be a necessity for many folks, but if the price is right it will make for a very nice addition to your laboratory.
So far, I have spent about $700 on my home electronics workshop. This cost excluded the cost of the computer as I already had one around that I use. Do I think that my workshop is complete? Can you ever have enough tools? Of course not! I do have a few things that are yet on my watch list. As I indicated, I am looking to purchase a DSO (digital sampling/storage oscilloscope), but I would also like to have an arbitrary waveform generator, a small reflow oven, and perhaps even a small pick-and-place machine.
One tool that I am very tempted to get is the new Red Pitaya that is on Kickstarter right now. My only hesitation is that it is only a 125Msp/sec (mega-samples per second) per channel device -- ideally I would like to have a 1Gsp/sec device. The nice thing though, despite the lower sampling rate, is that it has a 14-bit sample depth vs. the standard 8-bit sample depth on most DSO scopes.
Have I missed anything? I am always open to new tools for the workshop. Please let me know in the comments below (I'm sure my wife would appreciate it).
I use Harbour Freight stuff as a test/filter. If I'm not sure how much I'll use something, or which item in a set I'll use, then I find them ideal.
For example, I bought a set of 20+ router bits from them for something like $20. I wore one of them out, and went out and bought a Freid version of that one bit for $17. But I wouldn't have known at the time which one(s) I would end up using.
Likewise, I bought a couple of woodworking tools. They weren't great quality, but several of them I never used, and one I deteremined had to be the highest quality I could afford. Again, let me get hands on before I pay a lot of money.
Now, soldering irons, and fine-tip tools: Buy the best you can afford.
I agree about what you say with regards to quality. There are very few things that I would recommend from Harbor Freight. This workbench and the tool chest that you mentioned. I am also fine with hammers and pry bar/chisel/I mean screwdrivers. Their stands for grinders are not that bad.
Though anytime I have gone there because I need an emergency tool, or a one time use tool and they ask me if I would like to purchase the extended warranty, I always laugh, and respond, "I came here knowing that I was purchasing a cheap piece of tooling that will probably break, and I am ok with that, if I wanted something with a warranty, I would go somewhere else." The cashiers always give me a look of shock and disgust.
For the tools you use all the time, buy very good quality. I'm in automation, so I do a lot of electro-mechanical work.
I recommend Bondhus for hex wrenches (mine are ~15 years old), and Wiha for screwdrivers (I use mine all the time, although there are other good brands). Invest in a good set of wire strippers; mine are Paladin with soft grips.
I use a lot of Plano 3750 tackle boxes to store stuff like connectors, pins, hoods, etc, with some of the dividers glued down. I find Sterilte 1723 pencil boxes (available at Walmart for ~$1) great for holding stuff bulker items, and use clear plastic shoe boxes (also ~$1) for even bulkier items.
I'd go for an oscilloscope before a logic analyzer, but it depends on what you're doing.
Harbor Freight's stuff varies. Their hand tools are, in general, junk, but if you're only going to use something occasionally then it's not worth spending a lot of money. I've heard great things about their car jacks, and their red tool chests look nice, but I wouldn't take the cheap ones if they were free. I've been happy with their oscillating multitool (<$20 on sale; anything better is going to be >$80), and $40 DMM (you can buy the same DMM for 2x the price; it's got some nice features such as 4000 counts and AAA batteries - I HATE 9V batteries!!!)
@Aeroengineer: So, I am still curious as to what the final result will be.
Oh, sorry -- this was an early incarnation of the control system for my Man vs. Woman Display-O-Meter project using a PICAXE microcontroller -- I was using a lot of shift registers to read in the values from a bunch of switches and to control a bunch of tri-colored LEDs.
Now its' just a piece of "Electronic Art" sitting on the book shelves in my office
That is true, but even for things that I do not know their temperatures, or that my box may not be completely accurate in its temperatures it displays, I usually have a procedure.
For these, I usually start at a low temperature, then keep increasing the temp by 10°C till I get to the point that it is just barely melting the solder. I then add another 10°C after I reach that point. This way I keep the temp as low as possible. There are times that if I am soldering a joint that can sink a lot of heat that I might have to turn it up more.