Latest threads in Electronics Designshow only best voted threads
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high voltage LDO
I need to regulate a +24 supply down to +22, 0.8 amps maybe. There's not much headroom for +24 drift, so I need an LDO. Few if any LDOs can tolerate +24 in. We stock LM2941, adjustable LDO, which for...
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7 years ago
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help with displacement current, distributed capacitance
Assume an inductor with a sinusoidal current. The inductor has capacitance between turns, or distributed capacitance. Q is of interest in this quest. My pet theory is: The distributed capacitance...
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7 years ago
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Vacuum tube noise source
This circuit uses a 2D21 thyratron as a noise source, the noise is generated by placing a permanent magnet on the envelope and causing "fluctuations in the dense layer of positive ions near the...
22
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7 years ago
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More CUI SMPS
Well when it rains it pours. I've got another couple of circuits where I need to replace an old linear supply that is not longer available. So I'm again trying the wall wart and a CUI three terminal...
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7 years ago
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OT: Slowman Exposed...
OT: Slowman (and other lurkers here) Exposed... ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen...
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7 years ago
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thermocouple connector
I need to bring Type-E (Ni-Cr and Cu-Ni) thermocouple wire inside of (weathertight) enclosure. Ni-Cr is not solderable (AFAIK), I do not know about Cu-Ni (we do not have it yet to try). Is using...
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7 years ago
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Xilinx HW-130 Adatpers
> So I need to find the adapter(s) below. If anyone can help out please > let me know. > > HW-133-PC44 > HW-133-PC68 > HW-133-PC84 > > For reference here is webpage showing the HW-133-PC68 adapter...
1
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7 years ago
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Junkbox boost converter update
So I replaced the feedback divider with a scaled up resistor network, with the top resistor in the megohm series. I also added a high-current PNP pulldown at the gate, driven from three sections of...
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7 years ago
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OT: Unexpected, but maybe should have expected
Unexpected, but maybe should have expected... Wife brings a digital kitchen timer into my office... "it stopped working". Changed battery... nada. On a lark, don't know why I thought of it, removed...
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7 years ago
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Power Supply
Suppose I wanted to buy an off-the-shelf fixed +/-20V 5A (ea) for a G-job, what would I buy? ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and...
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7 years ago
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What would you call it?
What would you call it? I've developed a simple-minded subcircuit for use with NOISE analyses in Spice/PSpice/LTspice such that... o It passes DC at whatever RDC you set o It jumps to gmin/2 at some...
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7 years ago
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The Deplorables
You go right ahead, but we ain't taking no more shit. 1. Women, White Men gave you your rights. 2. Blacks, White Men gave you your rights. I, a White Man am willing to die for your rights right now....
138
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7 years ago
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Looking for Spectrogram of GSM Signal
Does anyone know where I can find online a detailed spectrogram of a GSM phone signal? Any network will do. I want to see the TDMA and other pulsed components. Kevin Foster
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7 years ago
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Amplifier startup problem
I've implemented the circuit on page 2 of with the addition of 1K resistors across the 100uF capacitors to define ground as being midway between the power rails. Most of the time, it works fine, but...
50
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7 years ago
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555 timer alternative for short duty cycle?
555 timers are useful, but they have a limitation that they can't have a duty cycle of < 50% in astable mode. I need 100KHz, about 25% duty cycle for a switching power supply. I know I can use an...
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7 years ago
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