Latest threads in Hobby Electronics Basicsshow only best voted threads
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Using the THS4281 for high side current sensing
I'm using a THS4281 to make a general purpose High-Side current sensor. I'm just building this on a small PCB so I can use it for measurements. I've already successfully tested this circuit (see link...
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15 years ago
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Class AB buffer stage
I've found a textbook that uses an AB buffer stage mosfet, but in an excercise a current in output transistor is always present for all output current range to avoid distortion. I have a question: if...
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15 years ago
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Load seen by opamp
Hi, 1)If i use an opamp with resistor feedback (for example in inverting configuration with gain -R2/R1), the output resistence seen by opamp is one resistor of R2 value? 2)for an opamp used in...
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15 years ago
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mosfet gate threshold voltage
4.5 Gate Threshold Voltage, VT , {VTH , VGS(th) } VT is the minimum gate voltage at which the transistor will turn ON. Does this mean, 100% full ON? Or that the gate is Starting to turn On (1% ON, for...
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15 years ago
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Source for cheap buzzers for electronic circuit lesson at school?
I am looking for about 10-15 buzzers for an electronic logic board lesson for my grade 9 kids. Does anyone know of an inexpensive source for these? Thanks
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15 years ago
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Question about transistor breakdown voltage
I see in the specification sheet for a darlington transistor that its collector to emitter breakdown voltage is 100V. What is its emitter to collector breakdown voltage? The same? Thank you in...
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15 years ago
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Max ratings of electret mic
Can anyone please give me an idea of the maximum safe P.S. voltage of the ubiquitous cheap electret microphone used in portable recorders, cheap headphones-mic combos, lapel mikes, etc.? I mean those...
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15 years ago
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New research field promises radical advances in optical technologies
New research field promises radical advances in optical technologies WEST LAFAYETTE, Ind. - A new research field called transformation optics may usher in a host of radical advances including a cloak...
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15 years ago
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About Radio Waves
How can we make a Radio transmitter and receiver. Pl. give me some easiest possible ways to do so.
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15 years ago
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Vintage opamp
Hello I have 5 pcs used Philbrick/Nexus SL-26. I want to test the opamps but I need a datasheet. Can somebody help me?? Regards Benny Denmark
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15 years ago
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Audio amplifier (part 2)
Hello, it is me again ... After "jouling" some transistors, I decide to move to LTSpice. Which is funny as I am doing electronics as hobby to change from being in front of computers all day long ! I...
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15 years ago
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CRT image trouble
Hello all, years ago I installed a new Happ 13" CRT in a video game I own. The game probably has about 20 hours on it since I changed the tube; my children don't play it anymore... Anyway, the image...
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15 years ago
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questions on Class B audio amplifier
I took a look at this: It appears that this unit's max continuous power output on +/-12VDC at 4 ohms is 18W, if I calculated that right... I wanted to build it, but I realized that increasing the...
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15 years ago
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high current charge pump
Typical pump drivers seem limited to a few dozen mA. Do any charge pump drivers exist which can convert 12VDC to +/- 24VDC at ~ 2A? Thanks, Michael Analog Devices is a global leader in the design and...
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15 years ago
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Can current flow in both directions through a JFET channel?
I am beginning to study JFETs . I want to limit this discussion to N channel JFETs and when I talk about current flow I mean conventional current flow. Most of the sources that I have been studying...
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15 years ago
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