Latest threads in Electronics Designshow only best voted threads
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PIC PWM LP Filter Help
The PIC in the diagram below is programmed to produce 5 frequencies grouped around 40Hz. It outputs a 5Vpp PWM signal. This passes fine through R9 and R10, but as soon as I connect either of the 473...
16
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8 years ago
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16 | |
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Online Service for Gerber from Schematic
Does anyone know of an economical online service that, when sent a schematic diagram, will produce a Gerber file from which I can have PCB's fabricated ... probably by another online service? Bob...
22
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8 years ago
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22 | |
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myropcb
We bought some proto 4-layer boards from and a couple of my people are testing some circuits. The boards are crap. Pads keep falling off.
5
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8 years ago
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5 | |
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Programmable tracking pulse supply.
I'm designing a programmable tracking pulse supply. This is an SMPS, with dual tracking positive and negative outputs. It must run from a 5 to 24V input, and deliver +/-5 to +/-50 volt outputs. A 0 to...
32
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8 years ago
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32 | |
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PIC daughterboard detection
I'm wanting to have a PIC detect whether a daughterboard is present, so it can activate I2C comm. My thought is to activate the weak pull-down on the input, to detect whether an I2C pull-up resistor...
8
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8 years ago
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8 | |
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Redesign Of Tek Battery Pack
Got this old Tektronix 422 here which still works. It has the battery optio n. Of course the batteries are no good at this stage of the game. I am considering replacing them with more modern...
10
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8 years ago
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10 | |
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OT: excess cost in US health care
The New Yorker dated the 11th May 2015 has an interesting article on pages 42 through 53. It's title "Overkill: An avalanche of unnecessary medical care is harming patients physically and financially....
70
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8 years ago
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70 | |
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Book reading SW Needed
Hi So I spend about 2 hours on the road every day to work (some people probably a lot more), and before the self guided car is available, I would like to maximize the usage of the time in the car. So,...
8
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8 years ago
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8 | |
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Flecap
This is the Maxim integrated variable capacitor I recall seeing some other parts/vendors somewhere, but I can't find them. It doesn't google well. Any leads?
4
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8 years ago
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4 | |
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USB A connector fail?
Hi, I went to pull some photos off a memory card using one of these dinky "5,976-in-1" (memory) card readers. Windows machine kept complaining about a hardware failure. And, the little idiot lights...
1
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8 years ago
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1 | |
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Re: Korg Monotron
Fixed: -- Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060 Skype: JeffLiebermann AE6KS 831-336-2558
6
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8 years ago
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6 | |
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Tritium decay experiment one year data from May 16 2014 to May 16 2015 released
More info on the experiment and setup here: Tritium decay experiment one year data from May 16 2014 to May 16 2015 released; The older data is still there too: I restarted the experiment today May 16...
13
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8 years ago
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13 | |
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Bibtrex Howland
Hello Bib, I drew my "bafouille" on this saturday morning .... no math, no excessive sims just fixed the fact that in your previous schematics you miised that the opamp goes directly to vcc. try go...
2
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8 years ago
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2 | |
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even more current source excitement
So I have the improved Howland current pump experiment set up and working in LTSpice, and am experimenting using two pumps to feed bandgap references. One of them is using an NPN transistor to source...
2
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8 years ago
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2 | |
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OT: Remote Access.
When I'm at my desk I access my Laptop and two PC's via a KVMP switch. With the weather as nice as it is here in the Springtime of the my patio via my wireless network... i.e. I want to emulate being...
31
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8 years ago
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31 |