App note from Vishay going back to the fundamentals of humble fixed resistors. Link here (PDF) In the shadow of microelectronics, passive components such as discrete resistors would seem to have fallen out of the field of view in electronics. Yet, it is the rare circuit that can do without resistors. And a look at […]
Tag Archives: resistors
App note: Pulse load handling for fixed linear resistors
Technical note from Vishay about linear resistor handling pulsed currents. Link here (PDF) The power and thermal behavior of fixed linear resistors are mostly based on DC or RMS loads, but pulse loads, like single energy pulse or a continuous flow of pulses, become more and more an important factor in professional electronics.
App note: Pulse capabilities for thick film power resistors
Another app note from Vishay on their thick film power resistors on pulsed application. Link here (PDF) Vishay Sfernice offers a wide range of thick film power resistors. Our resistors are able to dissipate from 5 W up to 1100 W with a large range of ohmic values (10 mOhm up to 1 MOhm). The […]
App note: The heat is on – High-power surface-mount resistors
Application notes from Vishay on effective heat dissipation for their aluminum nitride utilized resistors. Link here (PDF) The intent is to discuss a few techniques to manage the heat that is generated by high-power surface-mount resistors and the effects they will have on design space, complexity, and cost.
App note: Grid resistors: Determining nominal resistance
App note from Vishay on selecting grid resistors base on their application as resistors vary over continuous duty. Link here (PDF) Nearly all resistor materials change resistance as temperature increases. Depending on the material, this change can range from a few percent to 50 % and higher at 100 % duty on the resistor (100 […]
App note: Passives aren’t really So Passive: Resistors
Part 2 of the “Passives aren’t really so passive” series app notes from Maxim Integrated, this time about resistors and their tempco and tolerance degeneration that need to be considered. Link here (PDF) Passive components don’t draw power but even resistors can, and modify signals in unexpected ways. A resistor’s reaction to temperature, voltage, and […]
DIY resistor decade
Sjaak posted his resistor decade project, inspired by DigitalUnderpants‘ DIY resistor substitution decade box: Got some 1% resistors, thumbwheels and 2mm headers from ebay and a shiny pcb from dirtypcb and got myself a decade resistorbank (0-999999 ohm) Even enought parts to built another one :) Via the forum.
Will the SMD resistors marking become a history?
Will the SMD resistors marking become a history? Company YAGEO announced its intention to remove marking of RC/AC 0603,0805,1206 SMD chip resistors from July, 1-st, 2013. Everything implies, that the situation with marking of chip resistors (0603/0805/1206) will soon be similar to chip capacitors – i.e. no marking on the top of the component. The […]
Resistors and power ratings
Kenneth discusses resistors and power ratings: Resistors are possibly the most basic component of electronics; given an input voltage, they allow a current to flow, and given an input current to flow, they produce a voltage. The relationship between the voltage and current is linear (a straight line), (mostly) frequency independent (unlike capacitors or inductors), […]
App note: Technical guide to surface mount resistors
Here is a technical guide to surface mount resistors from Panasonic. It covers the theory behind various resistor materials and the manufacturing processes. Tables illustrate specifications for different types of resistors, and explain the failure mechanisms for them. Fixed resistors are principal electronic components composed electronic circuit. They are developed with demands of various electronic […]
Partlist Wednesday: Resistors
Every Wednesday we highlight a component from the updated partlist. This week: resistors. If you don’t have a cheap resistor kit with common values, head to eBay and get one now. It’ll prevent last minute part orders and project delays. Sjaak likes this kit from MDFLY because it comes in plastic pages, only $15. Many […]
Actual values of 10% tolerance resistors
Resistors and other electronic parts are rated to be within a certain percent of the specified value. A 1000 ohm resistor with a ±10% tolerance could have an actual value between 900 and 1100 ohms. So what’s the actual range of values in a bunch of resistors? Due to manufacturing techniques, it might not be […]
LEDs too bright
Nuxx.net writes: Today I finally got to poking around with the Hack A Day Bus Pirate v2.go … the LEDs on it are far, far, far brighter than they need to be. At my normally-lit desk in a normally-lit office, they are glaring. I’m going to consider replacing them next time I place an order […]