Rush PCB
I have a custom layer stack for my circuit board, so far cannot find any Rush PCB manufacturer who can make my board, anyone can suggest an advanced PCB manufacturing?
View ArticleData Recovery from Memory Card Failure
Has anyone else experienced their memory storage device to fail and just say 'not formatted' or something similar? I've had a few thumb drives that died on me and it is always at a random time. The...
View ArticleHow to export Designer Schematic project to PADS Logic/Layout?
Hi, I need to export my Designer Schematic project to PADS Logic/Layout to let my customer continue the design work. I couldn't find any export function in Designer Schematic. Could you pls let me...
View ArticleSplit core current transformers
Hi, all. I'm looking for split core current transformers at a reasonable price. This will be formonitoring circuits in my home. The Magnelab SCT-400 and SCT-750 series look good because they come in...
View ArticlePCB manufacturer and Electronics Calculator
Hi,I'm a Electronic hobbist, doing PCB related job. Usually i'm using PCB from local product. Worried about their product quality, usually i'm working on 4 layar PCB. Now i'm looking World best PCB...
View ArticleVoltage stays on when power is removed
Hello all, I designed a prototype circuit for my MSP430 and other components. It is powered by two voltage regulators and a current source. What confuses me is that after I remove the battery...
View ArticleHow to balance parallel MOSFET's
I want to place several mosfets in parallel to handle more current, but am confused about the Gate resistors and something refered to as a "balance" resistor. From what I've read, this balance...
View Articleadhesive for led
I want to glue some led lights into an oak (wood) panel. Is there a certain adhesive to use? I read somewhere I have to use neutra cure silicone and seems and I am having trouble getting it.
View ArticlePCB manufacturer and Electronics Calculator
Hi,I'm a Electronic hobbist, doing PCB related job. Usually i'm using PCB from local product. Worried about their product quality, usually i'm working on 4 layar PCB. Now i'm looking World best PCB...
View ArticleParallel leds driver problems
Hi all I have done extensive previous research into this but before I go ahead with my project I want to clear a few things up. I have attached a picture of my proposed design. My questions relate to...
View ArticleHELP! Measuring potential difference(V) for AC with Arduino
Hi guys! I'm trying to build a device to measure the electrical resistivity of a paste (cementitious materials) using Arduino Uno. Four steel probes are put inside the paste (jumper wires attached to...
View ArticleLED - Resistor Circuit Design Question
I have several types/colors of LEDs, both 3mm and 5mm, that specify a range for Forward Voltage (such as 3.2-3.5V) and/or a range for Current (such as 20-25 mA). I'm using some of the free online LED...
View ArticleHow to balance parallel MOSFET's
I want to place several mosfets in parallel to handle more current, but am confused about the Gate resistors and something refered to as a "balance" resistor. From what I've read, this balance...
View ArticleHigh Side Switch - Can't turn it off!
I'm using the ISP762T: http://www.infineon.com/dgdl/Infineon-ISP762T_20121201-DS-v01_04-en.pdf?fileId=db3a304412b407950112b428ef533ebd I have a 12V power source and all I want to do is switch it on and...
View Articleoptical sensor switch (photoelectric?)
I am trying to build an optical sensor switch for a small toy motor, but I am not sure where or how to start. I would like to make a photoelectric switch, or some type of optical switch that will...
View ArticleHow to balance parallel MOSFET's
I want to place several mosfets in parallel to handle more current, but am confused about the Gate resistors and something refered to as a "balance" resistor. From what I've read, this balance...
View ArticleFine pitch soldering issues
On a current project, I'm soldering this header on a board: http://www.digikey.com/product-detail/en/BM10B(0.6)-20DP-0.4V(51)/H11951TR-ND/2712174 The header seems great, it's small and low profile,...
View ArticlePowering a standard LED with 120 VAC
I want to power a LED with 120 VAC. I set up a circuit like the one in the attached file. I sized the resistor with ohm's law. I wanted 20 ma so that means a 6.8 K resistor with a minimum of 2.4...
View ArticleLooking to build a wireless sensor network (low cost and low power coin cell...
Folks, I am looking at implementing a very low cost temperature sensor module (module cost less than 10$)I wish to install these low cost sensors to sample the temperature and humidity on a highway...
View ArticleWhat parts are most worth salvaging from old tech?
Do you guys ever both salvaging your old tech? What's the oldest equipment worth bothering with before Moore's law renders it completely useless?
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