Electronics Forum: crystallized (Page 1 of 22)

TH Crystals

Electronics Forum | Tue May 10 08:23:07 EDT 2005 | davef

We wave [primary side] and reflow crystals for oscillators without fear. We hand solder liquid crystal displays. Consider checking with the crystal fabricator and using their guidelines.

Re: PTH Crystal Spacer

Electronics Forum | Thu Jan 20 15:02:00 EST 2000 | Russ

Many times the crystal supplier also has a package that already has epoxy bumps on them to allow th crystal to be raised off of the board. This is my preffered way since placing spacers on components can be time consuming and operators can and will

Wrong Crystal

Electronics Forum | Wed Nov 20 12:10:29 EST 2019 | rossrohrer1

Trying to create my own RFID reader based off the MFRC522 demo board by copying the layout and components, then later i am planning to change the footprint. I am having trouble replicating their crystal. The mfrc522 datasheet calls for a 27.12 mhz

TH Crystals

Electronics Forum | Mon May 09 15:21:28 EDT 2005 | tforbes

Hello, I am hoping that someone can shed some light on my somewhat strange question. The group that I recently started with have had a process in place where they do not run crystals through their wave solder process. From my previous work experien

TH Crystals

Electronics Forum | Tue May 10 09:42:40 EDT 2005 | tforbes

We are using a water soluable process, and we have no fear of washing the boards after the crystals have been placed. Any type of SMT crystal I have reflowed with no fear, thats why this practice troubles me, and I want to remove it altogether. I w

Phosphorus Crystal Formation

Electronics Forum | Mon Nov 13 07:04:59 EST 2006 | saaitk

We are having intermittent faults with BGA's soldered onto an immersion gold finish board with snpb solder. One potential cause I have been informed is the formation of phosphorus crystals. As I am not an expert in this area I have no idea if this is

Upside down placement of a crystal oscillator is acceptable ?? As per IPC clause its define Rectangular or Square En

Electronics Forum | Tue Jul 19 03:06:42 EDT 2016 | ishwarsingh1

Upside down placement of a crystal oscillator is acceptable or not ?? As per IPC Rectangular or Square End Chip Components – 1, 3 or 5 Side Terminations.I am not sure whether is applicable for crystal oscillator or not . Your answer wo

How to take care of crystal

Electronics Forum | Sun Aug 26 07:13:05 EDT 2007 | callckq

Hi Experts, Understand from my friends, PTH crystal can get damage easily when subject to vibration or heat..For example, if crystal drop from table to floor, its internal part already damage @ crack which cannot be seen by eye. Besides, they als

PTH crystal is malfunction when humidity is up to 90%

Electronics Forum | Tue Jul 06 15:24:38 EDT 2010 | flipit

Hi, I have seen the oscillation frequency change in higher humidity environments. Was doing some data acquisition in a high humitity environment in 1990 using some off the shelf loggers. The data that was collected was incorrect. Found out the cr

Wrong Crystal

Electronics Forum | Tue Nov 26 12:20:39 EST 2019 | rossrohrer1

I ordered a capacitor book. I reinstalled the crystal that i purchased from digikey, and swapped the two load capacitors out from 30pf to 10PF which works out well with the datasheet that calls for 10pf Load Capacitance, and this equation (CL = (C1

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