Electronics Forum | Wed Jun 18 18:27:21 EDT 2003 | samaniegocesar
Hi Mark Actually I'm a Operations Manager of UEMSA group, I'm an Electronic Engineer and I being doing and Designing some devices like your requirement( pneumatics machines, controllers, etc), I could Help you, I can Design the countdown timer, but
Electronics Forum | Wed Jun 18 19:16:56 EDT 2003 | GEJames
hello all - i am i need of a simple electronic counting device but i know little about electronics. would someone please describe to me the parts I'd need and the assembly process to create a computer that meets the following specs: 2 digital LED t
Electronics Forum | Thu Jun 19 14:14:28 EDT 2003 | samaniegocesar
Hello Mr. James Mark send a Email similar to your email about a countdown timer. I send him this email. Read and give me your comments.. I'm an Electronic Engineer and I being doing and Designing some devices like your requirement( pneumatics mac
Electronics Forum | Thu Jun 19 10:36:54 EDT 2003 | Jacob
Hi all I am having a reflow problem. Recently we started using a through hole connector with solder flux bearing technology on a densly populated board. The connector reflows at the same time as the smt components through reflow. The problem I am ha
Electronics Forum | Fri Jul 04 01:32:15 EDT 2003 | rheise
I've seen numerous incidences of mirror image cracking under endcaps in high dielectric material ceramic capacitors due to thermal cycling. If the cracking is deep enough to extent through the plates you can get breakdown and shorting. Section the ca
Electronics Forum | Mon Jul 07 11:45:45 EDT 2003 | lromero
Do you know what the maximum temperature rating is for the devices. But in my past experience you could be seeing the following. Excess thermal ramp rates typically you would like to see 2 to 3C/sec in the reflow oven, if it is greater than this i wo
Electronics Forum | Sat Jun 21 00:37:20 EDT 2003 | nifhail
Most of the capacitors & resistors supplier have implemented Leadfree finished on their components and like it or not, most of the PCBA house already using them in their process. I just got a notice from my component supplier telling me that they wil
Electronics Forum | Mon Jun 23 14:25:24 EDT 2003 | govi
Hi, I am a grad student workin on SMT placement optimization and i am exploring the possibility of utilizing unused slots and assigning multiple feeder slots for a component type on a chip shooting machine. so far my optimization model has shown very
Electronics Forum | Wed Jul 30 19:13:29 EDT 2003 | Steve Gregory
Be carefull about thinking that a hot air knife is going to be a cure-all to your problems. They may work in SOME situations. I have an Electrovert Electra that has a hot air knife, and to be perfectly honest, it creates more issues than it solves...
Electronics Forum | Tue Jul 01 17:38:24 EDT 2003 | jartman
I've faced this several times in the past, and the only real solution is to wirebond before SMT assembly. Everything leaves a residue, and trying to clean a residue off later is basically hopeless. This may require some trickery in your SMT process
