Latest threads in Electronics Designshow only best voted threads
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OT: AC efficiency, how important is the splasher?
I'm wondering how important is an air conditioner splasher? How much does it improve efficiency? Seems to me like the splasher tends to damage the coil fins, either by causing rust or by flinging...
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8 years ago
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USB CDC device works on laptop, but not on WinBook tablet
I have a USB device that I designed several years ago, using the Microchip PIC18F2550, and it has worked mostly OK on various laptops. It has four DC-DC converters driven by the USB 5V power and it is...
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8 years ago
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Cheap Li-Ion batteries 8000mah on ebay?
Are these batteries good? Seems cheap for an 8 amp-hour Li-Ion battery. You get two for $7.77 plus $2 shipping, or maybe $5 apiece.. DESCRIPTION: Quantity:2 Standard voltage is 3.7V, the voltage of...
25
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8 years ago
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25 | |
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Photodiode placement
Hi, I am trying to figure out at what distance and angle should I place Light dependent resistors from each other to track the sun. For example, I saw the following products on amazon and ebay The...
16
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8 years ago
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16 | |
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Gas cell heater
So I've got this glass cell, a cylinder, 25mm by 25mm, it's got Rb and some Ne buffer gas inside. (The buffer gas stops the Rb atoms from diffusing to fast and hitting the walls.) It needs to be...
47
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8 years ago
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Third order IMD in photomultipliers--weird behaviour
I'm working on an interesting project for a biotech customer, and I could use some wisdom from the assembled multitude. They're building a scanning fluorescence microscope that scans several lines at...
90
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8 years ago
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90 | |
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Voltage losses in iGBT trippler
I have a trippler circuit that is losing voltage starts with ~+900 VDC and tripples to a theoretical -2700V by switching the +900 to sequential virtual earths( caps and a diode) via the BJTs. The DC...
7
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8 years ago
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Spiral layout is difficult to do exact as there is a lot of iterative math involved.
One hour only. Will repost again after.
32
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8 years ago
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32 | |
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test channel
Is there any funstion in Xbee digimesh to test if the channel is free or not ?
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8 years ago
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Cheapest PCB manufacturer in china
( ) is the PCB manufacturer in shenzhen china Good quality , Low prices, NO MOQ Register now to get $5-50 cash coupons More details pls feel free to contact us Email: Skype: pcbway qiu
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8 years ago
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NSW, Australia, criminalises the possession of 3D printable gun designs.
Not just 3D guns, but the data used to make them. Penalty, 14 years in prison. Explanatory memorandum for the Bill (which has now been passed). "Schedule 1 [7] inserts proposed sections 51F and 51G...
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8 years ago
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DIN standards for reading?
Wikipedia lists DIN standards but has only a brief description: Are the DIN standards on-line for reading&perusing (and, in my case, translating)? Thanks. List of DIN standards - Wikipedia
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8 years ago
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OT: PIC16F648A interrupts
I have a simple program that runs the (timer2) PWM reliably, scope measurements confirm timing of pulse width and the rate as well. I add a simple 256 location lookup table to change the PW on a...
4
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8 years ago
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1G resistor
I got some samples of the Welwyn 1Gohm 2512 resistor. It's really 1G ohms: Next I measured shunt capacitance, glued down to a PCB with a layer-2 ground plane. That shunt capacitance seems crazy low,...
106
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8 years ago
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106 | |
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Experience with MCP7940?
I'm getting the software going for a MCP7940, and the I2C interface is giving me fits. This is with software that worked fine for a couple of ST inertial sensors. Has anyone had success or failure...
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8 years ago
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