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 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...

sci.electronics.design rs232 interupt on old ibm pc type machines Below are an rs232 initialization and a handler routine that work well on...

sci.electronics.design rs232 interupt on old ibm pc type machines Below are an rs232 initialization and a handler routine that work well on later vintage ibm pc types, roughly 200 mc and above. The AT vintage types however are a bust. The 8250 registers and the interupt mask register in the interupt controller appear as expected in both cases. Anyone have an idea what is missing f...

I've got a battery management unit that is reluctant to demonstrate functionality. The vendor's terminal com software seems non-functional...

I've got a battery management unit that is reluctant to demonstrate functionality. The vendor's terminal com software seems non-functional (will not install). So far the only evidence of life is a control line (one of three) hard on, and rare /XFFE /FFF signalled outputs on the rs232 port. Internal DC-DC fails to power LEM sensor. Balancing terminals seem inactive. Can anyone recom...

Does anybody have a favorite USB to RS-232 adaptor that they can recommend? Evidently some are not created equal and have had some issues. A...

Does anybody have a favorite USB to RS-232 adaptor that they can recommend? Evidently some are not created equal and have had some issues. A colleague in France reported that he had found some discrepancies in how the grounding was accomplished: "It appears that the RS232 plug body is NOT always bound to USB plug body, nor to the pin 5 (ground) of the rs232 plug, so that finally there...

Hi For a test setup I often need an analog signal to feed into the device under test. So I need a instrument with an anlog output. It needs...

Hi For a test setup I often need an analog signal to feed into the device under test. So I need a instrument with an anlog output. It needs to run on RS232 or USB I could roll my own, with a eval board, but have no time to spend on that Anyone know of a cheap model (no the National Instruments, NIDaqs, they are prohibitive expensive) Thanks Klaus

Hi, I recently designed a product with an RS232 port on it. I put a common mode choke on the ground and data lines to reduce EMI. Two...

Hi, I recently designed a product with an RS232 port on it. I put a common mode choke on the ground and data lines to reduce EMI. Two ground lines, Tx data and Rx data go through the choke. The choke I chose was a tiny eight terminal 0805 thing with an 80mA rating. At the time I thought that would be adequate for RS232, but we've managed to destroy a number of them through regul...

To 'stabilize' the frequency from the 'twisted' wire oscillator as described in previous posts, and to be able to set it via RS232 and read it, I...

To 'stabilize' the frequency from the 'twisted' wire oscillator as described in previous posts, and to be able to set it via RS232 and read it, I wrote some PIC 18F14K22 asm and added a simple 2 line LCD. The first line shows the requested frequency ,as typed in via RS232. The bottom line shows the measured frequency (against a 10 MHz xtal). http://panteltje.com/pub/GPG_freq_counter_PLL_IMG_...

Wow 460800 Bd via USB to serial adaptor works! Wanted to add a par port to my laptop, or at least some I/O pins. At 460800 Bd you can send a...

Wow 460800 Bd via USB to serial adaptor works! Wanted to add a par port to my laptop, or at least some I/O pins. At 460800 Bd you can send a byte in 2.17 uS. That means if I want to test I2C chips via USB to RS232 adaptor, and use only one state flip per bit, something that requires 4 bytes RS232 per I2C bit processing, for example: SDA high SCL high SCL low SDA low makes 10.8 ...

I was perusing eBay recently and noticed these old Picstart Programmers going for about $50. Why???!! With an RS232 port and I'm sure limited...

I was perusing eBay recently and noticed these old Picstart Programmers going for about $50. Why???!! With an RS232 port and I'm sure limited capability, the only theory I have is as collector's items.

sci.electronics.design source for used computers Can anyone suggest a source for used computers? I'm looking for a few Intel based...

sci.electronics.design source for used computers Can anyone suggest a source for used computers? I'm looking for a few Intel based desktop machines with a processor clock rate about or above 500 mc, hard disk, parallel port, rs232 port, and vga output for about $100 or less. Google showed about six dealers, presumably their advertizers, and nothing more. Bing did about the same. ...

What is the recommended USB -> Serial convertor for usage with the latest Win7/64bit OS? In the past, I've been pleased with the performance...

What is the recommended USB -> Serial convertor for usage with the latest Win7/64bit OS? In the past, I've been pleased with the performance of a Belkin device as it had RX/TX indicators and drivers were immediately available. Now I find that this device is not supported by the manufacturer with Win7/64. Thank you in advance for your advice, TomC

Argh. So, I think I manage to get the UART outie hooked up to the USB and/or RS232 converter outie (and innie to innie) well over half the...

Argh. So, I think I manage to get the UART outie hooked up to the USB and/or RS232 converter outie (and innie to innie) well over half the time. And, I just did it again. The STM32F303 has a SWAP bit in its UART configuration, to swap the TX and RX pins, but that would be cheating (and besides, I did it with RTS/CTS as well). C'mon. Say that _you_ get it right all the time! -- ...

Here's a "circuit golf" challenge (the goal is to solve the problem in minimum cost/complexity without using specialised components. The...

Here's a "circuit golf" challenge (the goal is to solve the problem in minimum cost/complexity without using specialised components. The "HomeBus" communication standard (which Mitsubishi calls M-Net and some others refer to as P1P2) sends 9600 baud RS232 bytes using inverted "alternate mark inversion" (successive zero bits are sent 2V pulses with alternating phases) on a 12-15V multi-d...

We have some wonderful old Tek 11801 scopes. The later versions will measure rising-edge RMS jitter of a vertical input step relative to the...

We have some wonderful old Tek 11801 scopes. The later versions will measure rising-edge RMS jitter of a vertical input step relative to the external trigger. But maybe that trigger has jitter. I'd rather scope two vertical inputs and compute the jitter between them. The two signals would be sampled exactly simultaneously and would be expected to have low vertical noise. We can RS232 int...

I am trying to make it work under win8... It isn't a Prolific 2303 and it isn't an FTDI FT232 or similar... Win8 does notice it was plugged...

I am trying to make it work under win8... It isn't a Prolific 2303 and it isn't an FTDI FT232 or similar... Win8 does notice it was plugged in (it beeps) but nothing new (that I can see) appears under Control Panel / Devices. I would expect a COM port with a Hayes compatible modem behind it. That is what their older models do. The old 7100 is a straight RS232 Hayes modem, but the XT is...

So 0.00 to 3.99 to 8bit and then via simple 8bit RS232. The data is well behaved , just going up or down slowly. As limited to hardware...

So 0.00 to 3.99 to 8bit and then via simple 8bit RS232. The data is well behaved , just going up or down slowly. As limited to hardware conversion/encoding at the sensor end (pc at the other so no decoding limitation there), thinking Send as packed BCD of the tenths and hundredths and then hardware encode onto MSB only when it is 1001 "9", the units 0to 3 reading as 2bit binary on the D6...

Gee Wee, the customer is not happy with 115K. We already determined that TI's MAX232 works up to 115K and the MAX3232 won't even work at 115K...

Gee Wee, the customer is not happy with 115K. We already determined that TI's MAX232 works up to 115K and the MAX3232 won't even work at 115K (although it claims to work). I know there are pin-incompatible MAX-something, but we don't want to change layout, just for the sake of in-compatibility. Are there pin-compatible, reliable MAX232 clones for 230K that work, not just claim to work? Th...

Ordered the Dealextreme GPS module about a week?? ago, came really fast, made a small test board: ...

Ordered the Dealextreme GPS module about a week?? ago, came really fast, made a small test board: http://panteltje.com/pub/testing_dealextreme_E411_GPS_module_IMG_3501.png That little pink thing with the red LED is the module. It says RS232, but really is only 3V logic level in and out, so I added a 7805 for its 5V supply, and a MAX232 (on the back): http://panteltje.com/pub/GPS_test_board...

Is there a simple Windows or Linux program that can decode serial data out of raw data from an digital oscilloscope? My old logic analyzer...

Is there a simple Windows or Linux program that can decode serial data out of raw data from an digital oscilloscope? My old logic analyzer does not have any serial data decoding and neither does my scope. So I'd need something that can take in the ADC raw data, I set a threshold to turn that into H/L digital values and the software would fish out the data words. Not sure if it even exis...