How To Create a Test For Your Boards - Everything essential you need to know (with Sean Hadley)

This "Dude" Sean is pretty cool - but a DAQ solution is fairly limited. A good follow-up video would be modelling the 3D jig and software required to organise a 3D printed or CNC machined jig. UK sounds a strange source for pogo pin manufacture - could Sean please reveal his contact there?

kindly guide me i want to see this video in urdu language pleas🙏🏻🙏🏻

Hi My Respectible Teacher One Question For You how can watch this vedio in my language.??? my language is urdu.!!!

Thanks for this video.

Thanks Robert for this video
I'm working with my team in test jigs development for about 4 years.
We have many vergions based on the tested board.
We can now test up to 14 analog signals, 20 digital signal, UART communications and the visual test of leds, switchs and lcds
Thanks for spreading knowledge

Thanks for great video again Robert. Some additional comments from former test developer. With commercial test fixtures you fairly may go to 0.8-1.0mm in diameter of test pads. There are suppliers who are focusing to even smaller test points diameter as 0.4mm, just those are crazy expensive and very fragile. Hitting directly to through hole connector leads it is not recommended as these may have flux residue left after hand or automated soldering. This may cause probes to be dirty and cause bad contact. JTAG Boundary Scan is really nice tool, just with limitation to cover full board functionality as it can check inly digital part or interconnects, analog part and voltages are still limiting factor here, so you may need still voltage, current, resistance measures. Especially if you have some kind of more complicated circuitry on board.
Would it be possible to include additional videos of schematic or software tips&tricks for reliability, redundant design for life critical design? Or radiation (satellites using COTS components) tolerant design concepts, architectures or low level schematics tricks?

One of our manufacturer tells that test
points should be not less then 1.5mm and they don't allow to use vias as a test point.
They explained, that during test, force from the pogopin may damage cooper and influance on connection.

my experience is that there are a couple of products that can do self-tests. The main chip turns to the unit that Sean designed. Unfortunately, you have to count on the testing procedure in advance and be aware that all features related to IC cannot be tested.
Personally, I do not like placing sense resistors on target boards because it is just another component that can blow up. Still, there must be a compromise.

Nice video. Binho can be replaced with usb2io device (usb2io.com)

OMG! So I'm a software engineer not an EE, and I (rightly) get lectured by EE's about my schematics and layout and decoupling caps etc etc, so now it's my turn. If you write software tests that look like that, you should be lined up against a wall and slapped with a wet fish. Seriously, a bunch of "if-else" statements to a stdout is NOT a test harness. I am genuinely mildly horrified by this video. EE's need to spend less time worrying about a diff-pair impedance and more time mastering writing decent software. This is about as far from "best practice" as you can get.

Sir, could you please teach us how to get pcb negative print on glossy paper for hand made pcb in altium designer?

For getting the digital protocol interfacing running we've been using plain old FTDI MPSSE breakout cables with the pyftdi library. Fixturing itself is done using a custom pcb with sensors (actually an extended version of our development fixture) set in one of these Ingun boxes. A bit of self-test in firmware but most of this using the fixturing pcb and python code. Also, if you get things like a larger FPGA on your board these often have their own power supply monitoring that you can use for testing/monitoring.

Was waiting for this one!

Also, I'd like to know what his feelings were after the news about the Christchurch shooting (offtopic). I'd be very mad and sad.

COuld we know from which place in the UK he buys the probes please?

I like how Robert was keeping Sean honest during this interview.

Nice Content :)
For dense PCB's designers use an additional hardware like BST circuits specifically for testing of the boards.

For current measurements i feel placing sense resistors in the pcb and measuring the voltages from the nails through DAC is better.

LabView is actually incredibly easy to learn. The issue with NI is that you get stuck in the ecosystem easily, and it's very expensive.

Excellent. 🙃

High density boards often use JTAG for testing, it's very versatile tool in test engineer toolbox (allowing testing and firmware upload) ;) but software can be costly :/

I was wondering if/how it's possible to perform panellized testing prior to routing/v-grooving the panel. I have an idea for a board that would use finger connectors and I thought it would be cool if I could test a panel at a time. I think it should be possible to extend the finger connectors and use those lines directly to perform tests. Then when testing is done, the panel can be routed. I don't know of a PCB manufacturer that would offer such a service.

I could just design a test board that would accept my board and do testing that way. This will probably be the initial direction I will take, but I think the idea I describe above would be a lot faster at higher volumes. I also don't want to go the direction of routing traces across v-grooves or mouse bites.

I’ve been in the same situation a lot of times, I’m now planning to check Blue Clover Devices PCT for some boards I’m making

Incredible content, as always! ;) Keep going 👍