Cheapest way to add USB and 5 V and 3.3V power to a RS232 PIC project

Started by Jan Panteltje in sci.electronics.design8 years ago

Cheapest way to add USB and 5 V and 3.3V power to a RS232 PIC project Got some ebay USB To RS232 TTL PL2303HX Auto Converter Module...

Cheapest way to add USB and 5 V and 3.3V power to a RS232 PIC project Got some ebay USB To RS232 TTL PL2303HX Auto Converter Module Converter Adapter for arduino ebay object: 360750555245 Module has 5V and 3.3 V out (from the USB power). The PL2303 works 100% OK with Linux native drivers. Just connect to RS232 in and RS232 out, and power, and no need to write USB code, or get a sp...


Cheapest way to add USB and 5 V and 3.3V power to a RS232 PIC project

Started by Jan Panteltje in sci.electronics.design8 years ago 8 replies

Cheapest way to add USB and 5 V and 3.3V power to a RS232 PIC project Got some ebay USB To RS232 TTL PL2303HX Auto Converter Module...

Cheapest way to add USB and 5 V and 3.3V power to a RS232 PIC project Got some ebay USB To RS232 TTL PL2303HX Auto Converter Module Converter Adapter for arduino ebay object: 360750555245 Module has 5V and 3.3 V out (from the USB power). The PL2303 works 100% OK with Linux native drivers. Just connect to RS232 in and RS232 out, and power, and no need to write USB code, or get a sp...


Battery System Design

Started by OldGuy in sci.electronics.design7 years ago 7 replies

Subsystem consists of: 115 VAC Car Battery Charger 12 V Car Battery 12 VDC to Laptop Power Converter Laptop Charger provides full...

Subsystem consists of: 115 VAC Car Battery Charger 12 V Car Battery 12 VDC to Laptop Power Converter Laptop Charger provides full time current to charge the Car Battery and to power the laptop power converter to laptop. When AC goes off, car battery provides power until depleted. The laptop is to run all the time until battery depleted. Laptop max 90 Watts. 115 VAC Car...


3D CAD for EDA?

Started by Anonymous in sci.electronics.design3 years ago 1 reply

This is in SolidWorks, but SolidEdge says they do PCB design now in their...

This is in SolidWorks, but SolidEdge says they do PCB design now in their offering. https://grabcad.com/library/lm2596-dc-dc-buck-converter-module-1 There is a lot of stuff like that there.


@ DJ Delorie

Started by en2 in sci.electronics.design7 years ago 2 replies

Can you export your BLDC controller schematic to eagle ? I dont work with gEDA and am used to eagle. As far as i know there is no converter...

Can you export your BLDC controller schematic to eagle ? I dont work with gEDA and am used to eagle. As far as i know there is no converter for this. Regards !


AC/DC Power Integration solutions

Started by Habib Bouaziz-Viallet in sci.electronics.design6 years ago

Hi all, For those who have already used the TOPSwitch chip family from PowerInt, i would very grateful any advices on these AC/DC converter...

Hi all, For those who have already used the TOPSwitch chip family from PowerInt, i would very grateful any advices on these AC/DC converter solutions. Best Regards, Hab.


DC-DC converter advice (5V to 6.5V)

Started by Anonymous in sci.electronics.design4 years ago 6 replies

Hi, I have a client who is looking to incorporate a UV led that needs 6.5 V for operation. There is a existing 5V USB power but I wanted to know...

Hi, I have a client who is looking to incorporate a UV led that needs 6.5 V for operation. There is a existing 5V USB power but I wanted to know if anyone had suggestions on how to convert to 6.5 V or some other voltage to drive a UV led. Regards, Scot


DC DC Converter 100V to 10V

Started by panfilero in sci.electronics.design10 years ago 15 replies

can anyone suggest a smps topology or an off the shelf component that could convert 100V DC (@ .2A) to 10V DC out? much thanks

can anyone suggest a smps topology or an off the shelf component that could convert 100V DC (@ .2A) to 10V DC out? much thanks


How do you test a 24Bit ADC

Started by Fibo in sci.electronics.design7 years ago 37 replies

Can anyone recommend a way to test the resolution and a accuracy of a 24bit converter? Does this require expensive, calibrated, super precision...

Can anyone recommend a way to test the resolution and a accuracy of a 24bit converter? Does this require expensive, calibrated, super precision equipment, or is there a simpler (cheaper) way to do this? much thanks!


12v DC to 20v DC

Started by Anonymous in sci.electronics.design10 years ago 10 replies

Anyone has a DC-DC (12v -> about 20v at 4 to 8 A) converter schematic that proved reliable?

Anyone has a DC-DC (12v -> about 20v at 4 to 8 A) converter schematic that proved reliable?


30V from 24V

Started by Phil Hobbs in sci.electronics.design7 years ago 171 replies

Hi, all, I have a measurement application (finding blood spots in hen's eggs) for which I need to pulse a 20W white LED at a couple of...

Hi, all, I have a measurement application (finding blood spots in hen's eggs) for which I need to pulse a 20W white LED at a couple of kilohertz. No problem there. Thing is, it needs about 28 V at 700 mA, and the available supply is only 24 V. So there are a few ways of slicing this. The two most obvious ones are (a) a boost converter to make +30, and (b) an inverter to make -6....


Highland Technology Optical/Electrical Converter Model J730-1 on ebay

Started by miso in sci.electronics.design10 years ago 18 replies

Ebay item 320852202200 Highland Technology...anybody hear of these guys? ;-)

Ebay item 320852202200 Highland Technology...anybody hear of these guys? ;-)


Frequency-to-voltage converter, PLL with an AD650

Started by Jean-Pierre Coulon in sci.electronics.design7 years ago 10 replies

I tried to reproduce fig.22, p.17 of the datasheet but the output voltage is always about +13 V The VCO alone (like fig.12) works up to about...

I tried to reproduce fig.22, p.17 of the datasheet but the output voltage is always about +13 V The VCO alone (like fig.12) works up to about 1 MHz provided the input voltage is in the [-12:0] range. Has anybody a working schematics? Regards, -- Jean-Pierre Coulon


[FS] 8MHz BW DDC and DSP Carrier card

Started by Mac Decman in sci.electronics.design8 years ago 1 reply

I'm trying to find a home for some RF test equipment. Not asking any money for it, but looking for a local pickup if someone wants it. Puyallup,...

I'm trying to find a home for some RF test equipment. Not asking any money for it, but looking for a local pickup if someone wants it. Puyallup, WA or the Seattle Metro area. I will not ship. Available are: 1) Digital down converter, went though all the leg work to get the software, manuals, and etc. and found out the max bandwidth is only 8MHz. So if anyone has any need for such a thing...


Ultra-efficient bucks

Started by Piotr Wyderski in sci.electronics.design2 years ago 21 replies

I have been recently working on my current-fed converter. Its only advantage is that it works, but not exactly as advertised. This circuit...

I have been recently working on my current-fed converter. Its only advantage is that it works, but not exactly as advertised. This circuit deserves a separate autopsy thread, but the scope for some reason doesn't like the pen drives I have at hand. So it would be pointless to start without some screen dumps indicating where the problems are. I would like to evaluate it against some alte...


Tek TM5000 series

Started by bitrex in sci.electronics.design3 years ago 1 reply

Any of these collectable trading-card-type modules worth the price in 2019 to add to a growing lab? A THD analyzer and "ultra-low distortion"...

Any of these collectable trading-card-type modules worth the price in 2019 to add to a growing lab? A THD analyzer and "ultra-low distortion" sine-wave generator in the same box might be nice. Time-interval-to-voltage converter maybe useful. Precision phase comparator.


Flyback Efficiency -- Looking for suggestions

Started by Tim Wescott in sci.electronics.design6 years ago 105 replies

I done messed up, and have managed to make a 50% efficient switching converter. I may have to just grin and use it (look! it's a space...

I done messed up, and have managed to make a 50% efficient switching converter. I may have to just grin and use it (look! it's a space heater, too!), but if there's a quick solution I'm open to suggestions. It's a flyback, going from 3.7V (1-cell LiPo) to 200V. I'm using off-the- shelf transformers. It was looking a lot better in simulation than in real life, until I added what se...


Amplifier, adc driver

Started by Anonymous in sci.electronics.design7 years ago 7 replies

Hello, I'm looking for a schematic of the amplifier with band from DC to 100 MHz and impedance 1Mohm for 14bit ADC converter. I googled only...

Hello, I'm looking for a schematic of the amplifier with band from DC to 100 MHz and impedance 1Mohm for 14bit ADC converter. I googled only simple solutions based on eg AD8138 with trafos and imput impedance only 50 ohm Any sugestion? Peter


Original Royer paper

Started by Klaus Kragelund in sci.electronics.design10 years ago 13 replies

Hi I am looking for the original paper from 1954 that George Royer did on his Royer converter circuit: "Transistors as on-off switches in...

Hi I am looking for the original paper from 1954 that George Royer did on his Royer converter circuit: "Transistors as on-off switches in saturable-core circuits" in Electrical Manufactoring Anyone know where I can get this? Regards Klaus


Bidirectional LLC

Started by Piotr Wyderski in sci.electronics.design1 year ago 6 replies

Hi, Every converter with synchronous rectification should be capable of bidirectional operation. But there seem not to be any practical...

Hi, Every converter with synchronous rectification should be capable of bidirectional operation. But there seem not to be any practical realisations of bidirectional LLC, except for some vague conference papers. And even then it is not a pure LLC, but a CLLC or split-rail LLC. Why? Best regards, Piotr