Activity for DSI‭

Type	On...	Excerpt	Status	Date
Edit	Post #291368	Post edited:	—	8 months ago
Edit	Post #291368	Initial revision	—	8 months ago
Answer	—	A: What happens when a microSD card is hot-unplugged? There is no provision in FatFS or the fat32 filesystem in general regarding hot-unplug, so this behaviour depends wholly on the implementation layer for your hardware. As an example, in my use case I have tested the behaviour of my system when I remove the memory card without calling fclose() on o... (more)	—	8 months ago
Comment	Post #290284	Could this be an effect of the capacitor's dielectric absorption? (more)	—	about 1 year ago
Edit	Post #289661	Initial revision	—	over 1 year ago
Answer	—	A: ATX Computer Power Supply Spark in Non-computer Application Do you supply the PSON# signal before or after the main power comes on, or before connecting the load? Looking at the datasheets, the correct sequence is VAC power on, then PSON# signal to ground, then DC rails come on. Your load should be connected before PSON signal is taken to ground, because thi... (more)	—	over 1 year ago
Edit	Post #288506	Post edited:	—	over 1 year ago
Edit	Post #288506	Initial revision	—	over 1 year ago
Answer	—	A: micro-RF connector crimping options I've not seen them sold separately through distributors like Mouser and such, and have not seen any hand tools for these. I found this document and this video - it looks like the machines are semi-automatic and you need to inquire with the manufacturer directly regarding availability and price. (more)	—	over 1 year ago
Edit	Post #287949	Initial revision	—	almost 2 years ago
Answer	—	A: Using arc trace routing instead of 45 degree trace routing Olin has a great answer, I just wanted to add some of my personal experience. I only started laying out PCBs three years ago, and I use KiCad. KiCad got curved traces support in test version 5.99 over two years ago, and I immediately started using that build because I was fixated on the aesthetics of... (more)	—	almost 2 years ago
Edit	Post #287948	Initial revision	—	almost 2 years ago
Answer	—	A: Testing instrumentation amplifier with differential signal One of the reasons to follow the advice of your instructor is that page 17 of the datasheet identifies the need for ground return paths for input bias currents. Your initial setup may or may not work depending on the specific function generator and its output settings, because there is no current flo... (more)	—	almost 2 years ago
Edit	Post #286819	Initial revision	—	over 2 years ago
Answer	—	A: Pick & place file generated by Altium does not match the actual component rotations/positions Does your produced CPL file correspond to the Altium layout, or to what Eurocircuits Assembly Visualizer is showing? Open the CPL file in Excel and check. If the Altium output is wrong, I'd say check your output settings when you are producing the CPL file. If Eurocircuits Visualizer is wrong, check... (more)	—	over 2 years ago
Edit	Post #286691	Initial revision	—	over 2 years ago
Answer	—	A: Siglent1104 oscilloscope channels lagging Olin's response covered everything I would do in your situation as well. If the problem doesn't follow the probes and doesn't go away, I wonder if due to only two A to D inside the scope, this is the switching delay from primary to secondary channels? (more)	—	over 2 years ago
Edit	Post #286126	Initial revision	—	almost 3 years ago
Answer	—	A: How can we grow this community? I am a little late to the discussion, but I think I can provide yet another perspective. I found my way to this community via searching advice on improving my schematic clarity and found Olin's $tack answer. The quality of the answer led me to opening their profile, where I found the link here a... (more)	—	almost 3 years ago
Comment	Post #285458	Thank you for the detailed write-up of you approach to the design problem. I appreciate the step-by-step walk-though. (more)	—	almost 3 years ago
Comment	Post #285392	Thank you for the great write-up. The new diagrams you have added after Olin Lathrop's comment are much more clear and well drawn. (more)	—	almost 3 years ago
Comment	Post #285349	Tombstoning can still occur with a filled via, as it has to do with one SMD pad having a higher thermal mass due to the presence of the via. (more)	—	almost 3 years ago
Edit	Post #283577	Initial revision	—	over 3 years ago
Answer	—	A: Motor Controller - What might be the purpose of these resistors? I have watched multiple teardowns of this module, it is, as you have guessed, a capacitor discharge resistor network. The smoothing capacitor in this module is 550+0.68+0.68 uF 430VDC rating. Peak dissipated power is going to be 40W, less than 1W/resistor. (more)	—	over 3 years ago
Edit	Post #283139	Initial revision	—	over 3 years ago
Answer	—	A: What is this metal panel under power lines? It is a passive microwave/radio repeater. They were used as an economic way of getting around line of sight obstacles. I came across the information on these researching a way of passively linking an above-ground radio network with another one underground (we went with passive yagi-coax-yagi). My gen... (more)	—	over 3 years ago
Comment	Post #282575	Thank you for answering the initial question and for the follow up! I really appreciate you taking the time to share your knowledge and experience. (more)	—	over 3 years ago
Comment	Post #282575	Could I use solid state relays or would that mean having to address the same range of issues that using MOSFETs would necessitate? (more)	—	over 3 years ago
Comment	Post #282572	That is correct, the power electronics circuit has been redesigned to use 4x the power. (more)	—	over 3 years ago
Edit	Post #282572	Initial revision	—	over 3 years ago
Question	—	Battery voltage: to boost or to connect in series. Background. I have a legacy battery system that is comprised of twenty-four 12V Li-ion battery modules (self-protected), enclosed in a shell with the charging connection provided as a common ground and 24 individual non-isolated charger connections. The 24 Li-ion modules are connected in paralle... (more)	—	over 3 years ago