Components are the most basic elements in an electronic circuit. Characteristic is that they're in a single package. There are passive and active components, from as simple as a zero -ohm resistor to as complex as a multi-billion transistor IC.

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93 views

Automatic Solar light far too dim, help with increasing brightness

simulate this circuit – Schematic created using CircuitLab I've built a simple circuit that uses a transistor to switch from charging 2AA batteries during the day to discharging the ...
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112 views

Circuit component

What is this circular component with two parallel lines in it? I've never seen this before
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31 views

Composition of sticky gel in Film Capacitors

Bit of a long shot here, maybe someone knows what the sticky clear gel might be inside common dual film can capacitors (motor run). I'm specifically looking for an MSDS. This particular one was ...
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34 views

Altium: White 2D outlines [duplicate]

I started my component orientation when I suddenly see those white outlines around my components. And as I zoom in, they increase in number. Even when I tried to move my components elsewhere, they ...
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1answer
24 views

Altium: Rules and Query syntax

I want to set some rules for certain components. These rules are in the minimum solder mas sliver but I'm stuck on the query. So far I've written IsDesignator = U7 but nothing seems to change and I'm ...
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17 views

Altium: Foot print manager

Somehow not all schematic components (3 out of the 10 schematics have their components in the footprint manager) are found in the footprint manager. I made sure all tabs above (i.e. designator, part, ...
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54 views

Altium: How can I edit a component from a library

I downloaded a library from the internet and I want to create a new PCB component using the ones in the downloaded library with little editing/changes (such as the footprint). Is that possible? How?
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39 views

Atlium: Errors in PCB

I keep getting the same errors repetitively and I couldn't figure out the reason. As I was placing the components on the correct position (i.e. resistor), suddenly the component changed pattern from ...
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36 views

Automatically control EQ and Volume on audio signal

I am trying to control an audio signal with a microcontroller. I would use digital pots but seeing as I need 250k ohms, 300k ohms, or 500k ohms, at LEAST 256 taps, and volatile memory, there don't ...
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4answers
166 views

Troubleshooting PCB of an ATX power supply?

Im new to PCBs, know the basics of electronics and testing of individual components. I have a PCB (of an ATX supply) that is not working when I power it, so I thought of testing each components like ...
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48 views

Could somebody check this circuit/components and size the resistors?

simulate this circuit – Schematic created using CircuitLab Could somebody please check this circuit/components and size the resistors for me? I'm trying to produce a variation of this: ...
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93 views

What is this SMD component

Just out of curiosity I am trying to find out. What type of component is the green flat one in the picture?
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53 views

help with correct components for Fluid dynamic experiment and the circuitry on board testing rocket [closed]

I have a project that I am attempting to build and I know generically what I need to order but the detail is the problem.I have tried trawling though catalogs to find the appropriate component sensors ...
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1answer
30 views

How to generate a file with BOM for multiple schematics - EAGLE

I've 3 boards each with it's own schematic but with a lot of common components. I want to generate an unique BOM for all this boards to know quantity of each piece I need and make a single order BOM. ...
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25 views

Why cant I find a Force Sensing Resistor part definition in Eagle?

Below I have a schematic that I have used a generic resistor symbol with a label of "'FSR" to identify Force Sensing Resistors. I am used to using a different symbol. Is there a better symbol in ...
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3answers
291 views

How to choose components for a circuit

I designed a simple circuit: that I would like to put components on - the point of the circuit is to light the LED when the voltage source is above 4 volts (it won't be more than 5), so I am ...
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1answer
23 views

How do I automate the size setting (or any property) of both NAME and VALUE in a PCB BRD file?

I would like to set the size parameter of both value and name of components on a PCB layout to have a readable silk screen. Now it seems that I have to smash everything and go by them one by one. Is ...
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47 views

does changing the cable length of NTC temperature sensor affect accuracy?

I'm using an off-the-shelf STC-1000 temperature controller, popular with homebrewers, that uses an NTC sensor to read temperature and switch on a relay to cool or heat when the sensed temperature ...
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1answer
23 views

What are possible alternatives for a depletion PMOS

I need a fast reacting way of discharging a capacitor and I figure a simple depletion PMOS is what I need. The time at which the gate has to have a voltage to keep the depletion PMOS closed is not ...
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1answer
33 views

Binary Radio for Simple Circuits

I'm trying to find radio transmitter and reciever components for a simple wireless on/off switch; while a signal is being received the circuit is closed (while a signal is not beimg received the ...
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2answers
78 views

Creating an Integrated Circuit Component in Altium

I am new to PCB designing and I am new to Altium. I want to make a schematic, PCB design and simulate a RF circuit involving a GPS receiver front end IC MAX2769. Altium library does not have this IC. ...
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3answers
68 views

Component selection - difference between 4027 and 4027N flip flops

I am building a simple circuit that will use a J-K flip flop to enable me to use a momentary switch as a toggle. The circuit diagram states that a 4027N should be used. My local supplier has a ...
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8 views

PSpice Parts Setting Questions

Can somebody tell me how to set the "VAC" and "iPRINT" parts? Does the "VAC" part take to be sine or cosine ware? And does the "iPRINT" part follow what every "VAC" take for in terms of sine or ...
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50 views

Component identification service

For pills there exists a service which can ID them based on markings, shape, color, etc. I buy the grab bags of ICs from Jameco and sometimes get a part or two that I can't identify within a few pages ...
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74 views

Component identification 8Y

I hope someone can help I am trying to find out what this component is so I can hopeful replace it The device is a Fluke Network Management device the unit works for about 2-3 minutes depending on ...
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2answers
87 views

What is that rotating component for menu?

On some home made electronic circuits, to navigate the menu on LCD screen, a rotating component is used. My first guess was that it was a potentiometer and ADC was used for detection, but it rotates ...
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111 views

Can anyone identify this part?

I am thinking maybe a thermistor? I can't remember where I got it from.
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186 views

What parts could be labeled XT and be near a Clock of a microcontroller

An ice cube maker stopped working with the symptom that the temperature cycles are getting shorter and shorter. I suspect that the microcontrollers clock is not working properly. I desoldered a part ...
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33 views

“LB” component reference designator

I'm doing a bit of reverse engineering on my Das Keyboard Model S Ultimate. I'm beginning to develop a pretty good understanding of the circuitry, but I am confused about one type of component on the ...
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59 views

Need help identifying a component

I'm doing a repair job on a hard drive logic board which has a blown component. I'm used to dealing with SATA drives where the TVS diodes have suffered damage and therefore taking them out of line / ...
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2answers
46 views

Components with multiple possible values - how to designate on schematic?

Quite often it happens to me that values of resistors or capacitors don't play such a significant role. This is mainly the case with decoupling capacitors and e.g. LED series resistors. Often in ...
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31 views

Type M AC Adapter Pins -Identification Help

Below is the picture from a Belkin Wemo wireless switch teardown for the side that plugs into the wall outlet. The complete teardown is here They have mounted the AC pluggable pins directly on the ...
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1answer
64 views

Alternatives for a UDN2981A

I'm making the circuit depicted here. I already have the shift registers I require, but I can't find any UDN2981A ICs in the stores I have available to me. Unfortunately, I don't have time to wait ...
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3answers
388 views

Thought Process on Designing Circuits

I'm currently in my second year of computer engineering. I've taken circuit analysis courses and have a good general understanding of components, and a little bit of digital design, however, I'm very ...
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1answer
115 views

16x2 LCD Missing Components on the Back [duplicate]

I'm quite new to electronics and am doing it as a hobby. I recently bought a 16x2 LCD display online to use it with an Arduino. When I received it, it noticed that there were a few components missing ...
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61 views

What do you call a rotary switch that does not have a max turn degree?

Exactly like on the Logitech G35 or Logitech F540; not a rotary switch because those have notches and a physical limit. Instead of turning clockwise, or counter-clockwise, you rotate it 'up' or ...
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54 views

accelerometers vs gyroscopes

In terms of semiconductor integrated circuits, is there any difference between an accelerometer or a gyroscope? are they the same part? Can I get a IC recommendation for something with 3 axis?
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51 views

PCB Mount Push Button Identification Help

Can anyone help me identify the push button on this PCB board taken from a router? The button is circled in RED and is the one on the backside of the router, used to turn it on/off. I would like to ...
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1answer
72 views

Using Electronic Components To Make A Chain Reaction

I've been tasked with creating a Rube Goldberg machine that employs mechanical, chemical, and electric components as a school project. I've got ideas ready for the two former topics, but I'm stuck on ...
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431 views

Manually removing bulk components from cut tape?

I ordered a bulk quantity of components for experimentation and they were shipped in a cut tape format. I've been removing components individually from the tape but it requires a large amount of ...
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262 views

What are these electrolytic capacitors?

I am restoring a stereo amplifier circa 1985 (specifically the Technics SU-Z55). Part of that is replacing the electrolytic capacitors on the mainboard due to some audio popping and general age. There ...
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2answers
353 views

Texas instruments component size

I am about to make a pcb footprint for this package: http://www.ti.com/lit/ml/mpds049b/mpds049b.pdf But I am not sure what the two numbers mean, for example at pin 5 that 0,30/0,15. Are these ...
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198 views

Identifying a component on the circuit board of a mobile phone

I need to identify this component which I found on a circuit board inside a mobile phone.
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640 views

Rubber push-button

On lots of electronic devices, such as this Korg drummachine/sampler, there are some soft rubber push buttons. What are they called? (I'm looking for the most common name, so I'll can find them ...
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83 views

Should I build my own parts for making PCB with eagle or is there a database somewhere?

I'm trying to build a custom PCB for a project I'm working on. I'm building a small robot that navigates using a color sensor and moves using two motors. For logic I'm using an Arduino Nano. My ...
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1answer
59 views

What is that? component identification

What is that? A capacitor or something else? Sorry for the bad quality... It is labeled with: [strange symbol] X50 YKRA
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4answers
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Do ‘wiperless’ potentiometers exist?

Potentiometers are renowned for wearing out (at least in my experience); the little wiper eventually just wears its contact and nolonger has a firm electrical connection. For an audio device, this can ...
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64 views

Identifying electronic components in Robotale Electronics fans package

I am trying to figure out what the following components. Is the blue component to the left a potentiometer? I would guess that the two black cylindrical objects are buzzers? Is there any way to ...
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81 views

Help Identifying Capacitor

I was given the following capacitor by a spare parts shopkeeper when I asked for a polypropylene capacitor (to be used in RC snubber circuit for a mains load). Can someone confirm this is the right ...
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121 views

What's the name for this connector?

Recently bought 3.7mAH li-ion batteries on ebay (it's labelled for use with RC toys, but I'm using it for DIY projects). Will need to buy the female adapter. Here are some pics: EDIT: Well then, ...