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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69 views

Design to fit components in small space

I have to design the connections between different electrical components inside a wireless equipment. The "traditional" way to connect each one with the others is the PCB, but the particular shape of ...
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1answer
46 views

How do I wire these potentiometers?

I'm trying to make this circuit (components in question are R10 and R11). I have two really nice sliders I bought from Science ...
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3answers
75 views

10A/115V Jumper

What component would you use for a 10A/115V jumper header (I need the user to be able to choose among a few power settings)? I have relatively small space on the PCB and I am also trying to be ...
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3answers
93 views

Switch that is physically closed, and electrically opened

Is there a switch which a user pushes/actuates to close, and which can be reopened with an electrical signal, and which does not consume power to stay closed or open? E.g. the user pushes the "Start" ...
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84 views

Anyone know what component it is in the photo? [closed]

It is a component used between a gate driver and a N-channel MOSFET in a inverter circuit, it acts like a diode when measured using multi-meter, and the lower side seems to be anode. It is surrounded ...
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2answers
58 views

Is there a component like terminal block that would allow you to create a power rail?

I'm after supplying 5v to a bunch (5) devices from a single 5v power supply (with sufficient power output). I'm wondering, is there something like a terminal block, but instead of being pairs of ...
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1answer
59 views

DIY HiFi System components [closed]

I'd like to create small HiFi home system with few requirements: It should use ONLY HDD of up to 100 GB (No CDs, Radio or other crap!) With remote control With small screen/monitor for easy visual ...
4
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1answer
85 views

Is there a good reason why TO-220 5-lead components have bent leads?

I've recently acquired some LM2596T-5.0 3A buck converters. They are TO-220-5L packages with bent leads similar to this image: I have seen other TO-220-5L components with straight leads like this: ...
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0answers
31 views

Locating parts by footprint (Transistors)

I apologize if this is not broad enough, delete if you must. Is there a good way to search by footprint with any of the common distributors or manufacturers? I need to replace an NPN transistor ...
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3answers
253 views

Tape and reel - using components OK?

If I buy a full reel of components (let's say resistors) with the intention of sending it to an assembler later so they can assemble my product, is it OK to use components from the reel when I'm ...
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1answer
63 views

What other standards are there than IEEE 315 and IPC?

What other standards are there than IEEE 315 and IPC for creating schematic symbols and component representations??
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1answer
91 views

How to infer pinout and winding ratio of this transformer?

Hi, I pulled this transformer from an EL wire inverter and am trying to figure out how to infer: Which pins correspond to the primary and secondary coils The ratio of the windings Any other ...
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2answers
98 views

Help me identify a component from EAGLE schematic

Can you help me identify the "L1" component in this schematic? It reads 33R@100MHz and is defined as an INDUCTOR. Maybe I'm reading it wrong (count on it), but I don't know how to deal with the ...
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2answers
88 views

MOSFET with *actual pin* for body

I have always thought that MOSFETs have four pins [see wikipedia], one of them connected to the body (i.e. substrate). However, when trying to order some, I have been completely unable to find any ...
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0answers
19 views

VHDL - Structural strategy, is it possible to reuse components?

I implemented 5 Muxes that generate a mask, called mask00. My target is generating other mask using the same Muxes. My code is ...
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0answers
98 views

Extract firmware of an old electronic toy

I'd like to extract the firmware of an old electronic toy. Is has two electronic components, made by Texas Instruments: a PC35303NL - QB 8649, which is the main controller I guess TMP50C40AN2L - ...
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0answers
10 views

Determine which component failed on a motherboard [migrated]

Laptop powers up from the battery but it does not from the charger and it doesn't charge the battery either. I have measured voltages on power circuit components (see in the attached image). ...
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2answers
39 views

Best Hardware for Accurate Point Tracking System

Here is what I am trying to accomplish: In the middle of a room, I have a mechanism with a laser diode mounted on it that can be moved in all axis by a motorized pan/tilt head type device. This ...
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1answer
66 views

What is a rotating “button” called?

You see them in various stereo systems and such, they are used to simulate a potentiometer. There is no limit to how much you can turn them in either direction and as you turn them they send pulses ...
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3answers
47 views

Matching appropiate current value for components

I was looking around the site and I encountered an intresting answer.The one who posted it said that:"If you supply too much current to a device,it will draw as much as it needs" and also that if you ...
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1answer
30 views

Other active component principles of operation

Besides valves and transistors... On another question, someone talked about magnetic amplifiers, but they are slow. Are there any other kind of "would-be" transistors out there ? A transistor that ...
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1answer
65 views

Help identify a resistor-like component

I came across this component, it looks like a resistor but has no color bands: Thanks
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1answer
41 views

Replacing SD card reader on a Raspberry Pi B+

I recently purchased a Raspberry Pi B+. However, the micro SD Card reader had a defective spring loading mechanism, so the card would not lock in place (a new Pi is now on the way!) However, I would ...
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2answers
81 views

Historical electronic components used in computers

Early computers used vacuum tubes and relays as active components to process information. Later on, transistors replaced those as the main components used in computers development (transistorized ...
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1answer
57 views

Unknown LCD display circuit design

I opened up the case of an old toy to take a look at what is inside. The device had what seemed to me a bizarre LCD display with a controller(or microcontroller?) I have never seen before(middle ...
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4answers
609 views

Inductive and capacitive terms

What it means when we say that some component or device is inductive or capacitive? How these terms are related to capacitors and inductors?
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1answer
51 views

Simple Circuit to stream video [closed]

I want to stream online video to an LCD screen from a phone or tablet. In the circuit will also be an accelerometer, battery, and perhaps a cache (if this would improve streaming). What kinds of parts ...
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4answers
78 views

What is the part name / description for these test points?

What is the name/description for the test point pins on this board? I've tried Digikey for all combination of binding post, test pins et, but no luck. These are through hole parts, height ~6mm, pin ...
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1answer
66 views

what is the purpose of this device>

I have this device out of an old laptop, and I have no idea what it is. there is a tiny tag that says something about RFID, and it has 4 wires going in. There is a coil of some sort, but most of the ...
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1answer
78 views

What is the name of the tiny PCB radio connectors? (e.g. Apple WiFi/Bluetooth antenna ports)

What is the name of the nearly-flush flat antenna connector often found in laptops/tablets for its external antennas? They are very small and the antenna lead usually has a 90º male plug that snaps ...
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2answers
98 views

Where can I search components according characteristics, not model?

I'm 2 years disconnected of electronics, and i don't know how i get and know the components i used, and i want to get and know few more components, but i can't get to know them... and well i was ...
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1answer
114 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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1answer
116 views

Circuit component

What is this circular component with two parallel lines in it? I've never seen this before
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0answers
54 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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1answer
39 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
31 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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20 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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1answer
65 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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46 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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0answers
37 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
279 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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52 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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1answer
103 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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54 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 ...
0
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1answer
58 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. ...
4
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3answers
334 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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0answers
94 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
24 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 ...
4
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2answers
111 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. ...