Questions tagged [transistor-array]
Anything related to transistor arrays, i.e. small-scale integrated circuits containing a limited number (usually 8÷16) of well matched transistors. They are used for applications where component matching is paramount or to simplify the layout of a design where many transistors must be used in the same configuration.
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Power Supply Issues with LM317
I have several question on this project:
Should base resistors be used on the 2N3055 array to limit base current?(see figure1).
Should each 2N3055 be driven by a TIP35C (Q8), or just one for the ...
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Common-positive LED circuit with bipolar logic source
I feel like there's an easy way to solve this, but I don't have the experience to even know what questions to ask or what research pathway to follow. I'm honestly not even sure I'm using the term '...
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SMD transistors are big and I can't find a PNP common collector array on a single chip
I am continuing work on my water management system including the tank level meter discussed here Water level meter with electrodes: earthing and galvanic corrosion and my solution with the PNP ...
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In SLA4031 (a darlington pair) what’s the function of R1 and R2
Hello I’m new in the electronics field and i stumbled across this IC SLA4031
Which is a darlington and k wanted to know what’s the function of the 2 diodes at the collector and the function of R1 and ...
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Can radio waves be focused to a point using a phased array?
I've seen many examples of ultrasonic phased arrays being used with non-linear phase relationship between elements to concentrate all the power at a specific point, for example here:
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Multiplexing signal array
I have a specific application where I need to interface 256 i2c busses arranged in array of 16x16.
I have used multiplexers to create LED arrays, but this problem seems different as there isn't part ...
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Which faults of dual transistors on isolated dice must be considered according to IEC 60335-1?
I got the task to upgrade one of our products to comply with the requirements of IEC 60335-1, which means, that no safety function must be lost in case of a single component fault. To save space and ...
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Can I use a CA3081 NPN transistor array instead of a bunch of 2N3904 transistors to drive a bunch of MOSFETs?
I was going to drive a MOSFET from an ESP32 (3.3 V output) with a 2N3904 NPN transistor like this:
I will need 24 MOSFETs in my project, and that is a lot of soldering.
I found the CA3081 general ...
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Super capacitor, water pump [closed]
I want to design a circuit which can store energy from a little 6 V solar panel into a super capacitor and when it reaches a certain amount of voltage (or gets full) , with a steep start , it ...
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How to replace a 8 channel DIP switch with a chip that controls it digitally [closed]
There is a 8 channel DIP switch whose state i wanted to change dynamically using a microcontroller. I thought of using an array of mosfets that will do the job. Kindly suggest me a DIP package or a ...
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Driving an array of resistive loads on high side with as little parts as possible
I'm trying to switch an array of resistive loads at 12V as fast as possible using least amount of parts due to limited board space. I have tried to find sourcing darlington transistor pairs but they ...
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Problem of transistor thermal runaway in parallel connection
simulate this circuit – Schematic created using CircuitLab
I wanted to use two transistors in parallel to increase current rating.
So I simply put two transistors in PCB design. Later I found ...
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Am I doing something wrong or is there something wrong in this PMOS SPICE model?
I am trying to create a PMOS in Multisim based on a SPICE model.
The component itself is a DMC2400UV-7 from Diodes Incorporated (MOSFET N/P-channel array for 20V.)
The NMOS simulation didn't give me ...
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ULN2003 IC , should I stack it or should I divide the load?
I am trying to drive 7 led strips.
I saw in the datasheet that the ULN2003 IC can supply 500mA per channel. In reality this would be limited due to heat dissipation by the IC.
Should I drive 3 led ...
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Confusing 2N3773 transistor connection
We have a battery capacity tester (upto 30V battery & upto 25A discharge current) which when connected to a battery causes a heavy spark even in off condition (Control card supply off).
We have ...
