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Circuit confusion help

May 20, 2016, 3:50 am

Can someone help me understand this circuit. I’m confused how both 5v and 12v are connected to same transistor Q63. Is 5/12v flowing through the same circuit when it’s turned on? Or is Q63 simply...

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What is stc32ab IC

May 16, 2016, 4:00 pm

I have some stc32ab IC’s but I cannot find any information or datasheet for them. Please give me some information and/or datasheet about this IC

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How to program a microcontroller via USB using JTAG? [closed]

May 14, 2016, 8:50 pm

I have some hard time understanding JTAG for programming. I have an mcu that can only be programmed via JTAG. What are some easy chips to start with in order to program an mcu via JTAG? I suppose I d...

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Arduino/IC Picture Scanner [duplicate]

May 7, 2016, 2:50 pm

This question already has an answer here: Embedded system for image processing project 4 answers

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First Time Using Integrated Circuits

May 5, 2016, 1:50 pm

I am building a circuit for a custom application. I have an old Toyota truck, and I keep leaving the headlights on, because there is no warning buzzer! I have designed a circuit that takes 3 inputs: *...

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Strange IC input leakage current

May 4, 2016, 8:00 am

I am reading the datasheet of the HEF4894BT. First I saw the input clamping current is rated at 10mA and than I saw the input leakage current would be 10mA, too. I thought the input clamping current is...

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MOSFET as a VCCS or an variable resistance

April 30, 2016, 11:00 pm

I am a bit confused. In saturation region, sometimes, an MOSFET is called voltage-controlled current source and sometimes it is called variable resistor where its resistance is controlled by the...

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What does a Schmitt Trigger inverter act as when unpowered?

April 25, 2016, 1:00 am

I assumed that a Schmitt Trigger inverter would act as an open circuit when unpowered, but discovered today that this is not the case. What does a Schmitt Trigger inverter act as when unpowered? I’m...

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What's the peak voltage of the sawtooth generated by the ic SG3525 or UC3525?...

April 24, 2016, 6:50 pm

P.S. I need this information in order to make a closed-loop FlyBack CC-CC converter. The Tm transfer function is related to the sawtooth peak voltage: Thanks!

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How are ICs named?

April 8, 2016, 2:50 am

To me, ICs never have names that hint to their uses. For example, this AND gate from TI is named SN74LVC1G08. But that tells me nothing about what it does. Is there a naming process for ICs? And if so...

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How to connect a switch between a dc power supply and the vcc of any ic in...

April 7, 2016, 3:50 am

I want to insert a switch between a power supply and vcc of an ic in proteus. Since by default the ic’s are connected to power rail of the circuit. I tried it by first connecting a switch between a dc...

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CS5463 IC circuit issues

March 31, 2016, 10:00 pm

I am trying to use CS5463 for power measuring by circuit from 41 page of its datasheet. The only difference is power supply part. Instead of powering IC from AC line I am using separate 5V DC supply...

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Unidirectional motor control

March 24, 2016, 2:00 am

I am interested in controlling the speed of multiple small DC motors that will draw at most 1 amp each. I only need to run them in one direction, so an H-bridge IC like the SN54410 seems like the wrong...

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8 bit adder with 2 CLA

March 22, 2016, 3:50 pm

I need to make an 8 bit adder with 2 4-bit look ahead adders.I spent a lot of time reading about it and I think I get the gist of how it works, but I can’t seem to get this. I spent a lot of time...

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Designed an electronic circuit using APR33A3. Not working [closed]

March 19, 2016, 7:50 am

Designed an electronic circuit using Datasheet of APR33A3. It doesn’t work. Checked the connectivity between component and it seemed fine. I have given a 5V DC supply Using an electret microphone 8ohm...

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I want to use many parallel LEDs. Can this IC (BP3309) help me to control...

March 15, 2016, 12:50 am

I want to use many parallel LEDs. Can the BP3309 IC (datasheet in Chinese) help me to control the LEDs? I want consistent brightness.

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Why there is no decoupling capacitors in analog IC

February 27, 2016, 12:00 pm

Here is a CMOS two stage amplifier. As you can see there is no decoupling capacitor at all. Also I don’t see decoupling capacitors that are used in CMOS integrated circuits. Could you explain why?...

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Why are my components unconnected in the middle of the breadboard?

February 24, 2016, 12:50 am

I have this breadboard: And I need my Integrated Circuit to be connected exactly like this (Don’t pay any attention to the wires. Let’s focus on the IC in the middle of the breadboard itself): However,...

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Would having a DC-to-DC Step Up Converter Damage the L293D H-bridge IC behind...

February 23, 2016, 7:50 pm

I recently purchased two L293D H-bridge Motor Controller from Adafruit (data sheet here), but after reading that the controller could only output a max of 600mA for a short time, I realized I had a...

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Current split on sn754410 chip and electromagnets?

February 14, 2016, 7:50 pm

Here is the schematic, except this uses the L293d I wanted to better understand how does the current split (if it does) between two of these IC chips wired as diagrammed with 2 electromagnets on each...

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