Latest threads in Electronics Designshow only best voted threads
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Step down D.C. voltage
I have 3 led lights that operate using 4.5 volts D.C. Instead of frequent replacement of 1.5 volt AA batteries, I would like to use a 12V 5AH Sealed Lead Acid Battery. What would I need to step the...
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10 years ago
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23 | |
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Remote Cell Phone Dialler
Is anyone aware of a transmitted or hard-wired system that allows one to dial in a phone number on a production model cell phone and engage in a two-way conversation remotely. IOW over a distance of...
1
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10 years ago
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OT: Lone Survivor Movie and Strategy
I saw recently a movie about the Seals' disaster in the mountains of Afghanistan. For those who saw it, I'd like to make a few comments, suppositions as an analyst. 1. The 4 Seals could have killed...
11
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10 years ago
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11 | |
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HEI coil driver
PP caps should not be immersed in mineral oil.
6
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10 years ago
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6 | |
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Buck switcher fails when potted
We're using a buck switcher, LM2574HV-5.0 in SOIC package on a custom PCB. The load is less than 200mA and the input voltage can vary, but most testi ng as been at higher input voltages, around 55V....
49
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10 years ago
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49 | |
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A bit of fuzzy logic
A bit of fuzzy logic Needed a circuit that disconnects the Lipo battery from my solar powered geiger counter SDcard logger when Lipo voltage drops to below about 3.1 V, this to protect that battery....
1
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10 years ago
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1 | |
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Tiny membrane converts radio waves to light
Tiny membrane converts radio waves to light: They bounce a laser beam of a DC biased capacitor that vibrates at its mechanical resonance when hit by radio waves. The new device has a room-temperature...
5
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10 years ago
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5 | |
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white noise generator is pink
White noise being swamped by 1/f noise?
18
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10 years ago
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18 | |
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EM770U 3G HSPA GSM modem
I brought a EM770U PCI express modem for my HP mini 301 laptop, but it lock s up the bios boot process when installed. The ebay seller said it works 1 00% on a Dell mini 1012. Is there reason that...
9
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10 years ago
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9 | |
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shipping, receiving
I'm continually astounded by how many big companies are brutalized by their own shipping and receiving departments. Things are lost, in limbo, in quarantine in Warehouse 99 until people sign off...
57
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10 years ago
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57 | |
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A switched attenuator for 100kHz to 300MHz
The Peregrine chips e.g. look nice but are expensive. Also I need to attenuate from 0dBm down to about -100dBm i.e. down to almost nothing. It's obvious why those chips only go down to 30db...
13
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10 years ago
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13 | |
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Basic Four quadrant bidirectional switch patented
This is insane: Cheers Klaus
12
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10 years ago
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12 | |
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.STEP FIle ??
Got a request for quoting IBIS model creation, and the potential client sent his data in .STEP file format. I have no clue what that is. I've made IBIS models from PWL files (which I suspect .STEP...
17
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10 years ago
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17 | |
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400 kV Tesla dropped in my mailbox today..
400 kV Tesla dropped in my mailbox today.. ebay item 141077605344 it actually works, so far as tested, already makes a strong noisy spark at 1.5 V supply. Will have to wait until I am finished with...
30
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10 years ago
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30 | |
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Happy Mardi Gras!
-- John Larkin Highland Technology Inc jlarkin at highlandtechnology dot com Precision electronic instrumentation
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10 years ago
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