zigbee's articles:

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Flyback Transformer: sleeving question 6 42 (9/5/2011 8:33:40 AM) comp.arch.embedded Hi, I'm designing a flyback transformer of a 25 W power supply. The power supply will be UL tested in Europe. The norm that will be followed is the UL 60950. The UL safety engineer told that the Hi-Pot test ... Enrico

BARE PCB TESTS QUESTION 6 26 (6/20/2011 4:26:26 PM) comp.arch.embedded Hi, I'm trying to understand how bare PCB's are tested and the differences between SMD and PTH tests. I heard of: 1) FIXTURE 2) SMD TEST 3) DOUBLE SMD TEST 4) PTH TEST 5) FLYING PROBE ------------------... Enrico

Flyback Power Supplies: Varnish question 3 36 (4/29/2011 8:18:24 PM) comp.arch.embedded Hi, some Switching Power Supplies come with some electronic components partially covered by a white glue called "Varnish". Does anybody know what Varnish is and why they use it all around in Power Supplie? T... Enrico

Question on: Touch Screen Films 5 72 (11/14/2010 3:09:25 PM) comp.arch.embedded Hi, I'm designing a Control Panel composed by a screen and a key pad. I noticed that Resistive and Capacitive Touch Screen Films are getting popular because they can replace silicon keypads. I know al... Enrico

OpenTherm protocol: looking for schematics 6 692 (12/21/2009 4:29:14 PM) comp.arch.embedded Hi, I'm designing a board that will have to embed the Opentherm interface. The website www.opentherm.org doesn't say much. I'm looking for schematics or hardware specifications. thanks for any help,... Enrico

BARE BOARD PCB TEST QUESTION 6 32 (10/30/2009 10:20:30 PM) comp.arch.embedded Hi, I'm routing a PCB. I'm trying to figure out if I can reduce the number of nails required by the fixture that my PCB manufacturer will have to build in order to test the bare boards. FACTS ---------- The... Enrico

ATE tests: VIA form factor and NES to test 4 26 (10/15/2009 7:44:33 AM) comp.arch.embedded Hi folks, I'm routing a board which will be tested by an ATE system (Bottom Access). The questions are: 1) VIA FORM FACTOR Let's suppose I have a net on the TOP layer and I need to test it: I have to add a VI... Enrico

ATE Test: how many push fingers? 5 35 (10/9/2009 1:14:39 PM) comp.arch.embedded Hi, I'm routing a board that will be tested by an Automatic Test Equipment line. I purchased and read the "SMTA/TMAG Testability Guidelines TP-101D" from smta.org: http://www.smta.org/store/book_detail.cfm?bo... Enrico

GROUP MODERATION 8 33 (9/24/2009 3:06:57 PM) comp.arch.embedded Hi folks, the spam in this group is growing fast. Are there any ways to moderate the group? Enrico ... Enrico

Question on Embedded Passive Resistors 2 48 (9/21/2009 9:48:04 PM) comp.arch.embedded Hi folks, can anybody explain me what Embedded Passive Resistors are? I read that they are resistors that can be built during the PCB fabrication process. In particular I would like to know: 1) Is it require... Enrico

zigbee's replies:

Items(22) /3 Next >> Last >|

Using infrared leds and transistors to make a keyboard 19 48 (9/8/2009 6:11:31 PM) comp.arch.embedded Hi, I have to design a 5-button keyboard. I would like to use infrared leds and transistors to make the buttons of the keyboard. Years ago, in fact, I had a digital manometer that had 4 buttons based on that ... zigbee (63)

Question on Embedded Passive Resistors 2 48 (9/21/2009 9:48:04 PM) comp.arch.embedded Hi folks, can anybody explain me what Embedded Passive Resistors are? I read that they are resistors that can be built during the PCB fabrication process. In particular I would like to know: 1) Is it require... zigbee (63)

ATE Test: how many push fingers? 5 35 (10/9/2009 1:14:39 PM) comp.arch.embedded Hi, I'm routing a board that will be tested by an Automatic Test Equipment line. I purchased and read the "SMTA/TMAG Testability Guidelines TP-101D" from smta.org: http://www.smta.org/store/book_detail.cfm?bo... zigbee (63)

ATE tests: VIA form factor and NES to test 4 26 (10/15/2009 7:44:33 AM) comp.arch.embedded Hi folks, I'm routing a board which will be tested by an ATE system (Bottom Access). The questions are: 1) VIA FORM FACTOR Let's suppose I have a net on the TOP layer and I need to test it: I have to add a VI... zigbee (63)

BARE BOARD PCB TEST QUESTION 6 32 (10/30/2009 10:20:30 PM) comp.arch.embedded Hi, I'm routing a PCB. I'm trying to figure out if I can reduce the number of nails required by the fixture that my PCB manufacturer will have to build in order to test the bare boards. FACTS ---------- The... zigbee (63)

BARE PCB TESTS QUESTION 6 26 (6/20/2011 4:26:26 PM) comp.arch.embedded Hi, I'm trying to understand how bare PCB's are tested and the differences between SMD and PTH tests. I heard of: 1) FIXTURE 2) SMD TEST 3) DOUBLE SMD TEST 4) PTH TEST 5) FLYING PROBE ------------------... zigbee (63)

Flyback Transformer: sleeving question 6 42 (9/5/2011 8:33:40 AM) comp.arch.embedded Hi, I'm designing a flyback transformer of a 25 W power supply. The power supply will be UL tested in Europe. The norm that will be followed is the UL 60950. The UL safety engineer told that the Hi-Pot test ... zigbee (63)

PCB in-circuit test: how do ATE machines measure resistors? 6 35 (4/2/2009 9:04:28 PM) comp.arch.embedded Hi folks, does anybody know how ATE machine measures the value of a resistor placed on the target PCB? I know that ATE machines, through a bed of nail, inject a certain voltage onto the test point. Also, wha... zigbee (63)

Mains Relay pin-out 5 43 (7/14/2009 10:43:50 AM) comp.arch.embedded Hi, I'm looking for a PCB Relay which will switch the Mains to some load. I noticed that many relays that claims "Max Switching Voltage 250VAC" have an odd pin-out. That is, the COMMON terminal passes throug... zigbee (63)

Flash File System for Dataflash 19 34 (9/7/2009 3:05:19 PM) comp.arch.embedded Hi all I wrote a flash file system for an 8051 project using a 2MB dataflash over the last 3 years. I tried to stay as close to stdio from dos (fopen, etc) as possible. I had to shape and change it a few times... hdekock (14)