On 8/23/12 11:46 PM, Michel wrote:
I am after a driver like the MAX232 that has 5V levels on one side;
+/- 5 on the other side and only requires a +5V supply. The MAX232
however is a 16 pin device and I am looking for something smaller (8
pins). I only need one Rx and one Tx channel.
I am also t
On Aug 1, 11:51 am, Terry Kennedy wrote:
> The Big Elektronika article has now been posted:http://www.tmk.com/blog/?p=419
One last Elektronika blog entry, to finish out the series - replica
faceplates: http://www.tmk.com/blog/?p=525
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Hello, look on rs485. I played with it a lot, ready to answer Your
questions :-) it works for long distances and allows more devices on one
line (bus).
Try to describe your devices more..
Dalibor Farný
http://dalibor.farny.cz
sent from Samsung Galaxy Pad
Dne 24.8.2012 7:46 "Michel" napsal(a):
If you don't mind surface mount, a MAX3313e is quite small and will do the
job.
Nigel.
- Original Message -
From: "Michel"
To: "neonixie-l"
Sent: Friday, August 24, 2012 7:46 AM
Subject: [neonixie-l] RS232 line driver
I am after a driver like the MAX232 that has 5V levels on one
I just want to establish some serial communication between my computer
and a PIC controller. Like David mentioned, RS232 is actually +/- 10V
rather than +/- 5V. The levels directly from controller are obviously
only 0V and 5V. Now I am thinking, for the Rx input this is not a
problem because it wil
I thought that the 'dead' band for 232 was -3V to +3V.
I have used 5V with printers and modems of the 1970s/80s.
Some 'cheap' RS232 drivers only used -5V and Gnd.eg the Microbee
computer.
Over short distances all sorts of liberties can be taken - it works; just
don't call it 232 !
John
On Aug 24, 3:52 am, Michel wrote:
> I just want to establish some serial communication between my computer
> and a PIC controller. Like David mentioned, RS232 is actually +/- 10V
> rather than +/- 5V.
Actually, the standard specifies an allowable voltage range from +/-
3V to 15V, with receivers r
RS232 spec is a range of voltage. There is a spec for the max supply volts
and a clarification for the 'logic' level.
eg -16 to -3 is one 'level' and +3 to +16 is the other. [I'll dig out my
copy if needed.]
Many receivers don't implement the dead area and some don't require the
change of polari
This one will actually do the trick and is small enough!
Thanks Nigel!
Michel
On Aug 24, 5:50 pm, Nigel Walker wrote:
> If you don't mind surface mount, a MAX3313e is quite small and will do the
> job.
>
> Nigel.
>
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> - Original Message -
> From: "Michel"
> To: "neonixie-l"
That is a so called 'corona stabilizer. The are suitable for hv supplies for
CRT's and such the like' . They work only at very low load currents ( µA
range).
eric.
_
From: neonixie-l@googlegroups.com [mailto:neonixie-l@googlegroups.com] On
Behalf Of Mark Moulding
Sent: vrijdag 24 aug
>
> Any other ideas for readily-available display solutions?
>
My Smartsocket design makes life easy when yoiu want to integrate B7971 or
IV-17 vfd's into a design.
The latest IV-17 version has a built in 4Play function (like four letter
word but with added word ladder feature)
If you sea
I am after a driver like the MAX232 that has 5V levels on one side;
> +/- 5 on the other side and only requires a +5V supply. The MAX232
> however is a 16 pin device and I am looking for something smaller (8
> pins). I only need one Rx and one Tx channel.
>
If half-duplex will work, the DS275
I've seen a lot of projects using pics and PC's, with no interface IC, i
think just some resistors. The PIC has a good output current from the
serial port and most importantly, the later pics have a configureation bit
for the UART to send inverted data.
There's a few suggestions here
http://www
A few ideas here too
http://www.scienceprog.com/alternatives-of-max232-in-low-budget-projects/
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Also known as "corotron" (tradename) tubes by Victoreen Mfg co. and
used with Geiger Mueller tubes, in Geiger Counters, which I believe was
their primary use.Ira
On 8/24/2012 1:41 AM, Tidak Ada wrote:
That is a so called 'corona stabilizer. The are suitable for hv
supplies for CRT's and
That is a neat part, too bad that it is no longer in production. Looks
like Components Direct sells them individually.
http://www.componentsdirect.com/maxim-ds275-pdip-8-package-rs-232-transceiver.html
I'm not sure that I would start a new design for manufacture with them,
though.
-Adam
On
The best way is to use rs232 to uart converter ($3 or so on ebay), You just
plug it into pc and directly connect to rxd and txd of your MCU. This is
cheap and easy solution. The converter itself uses a max232 IC to change
signals from rs232 to TTL.
Dalibor Farný
http://dalibor.farny.cz
sent from
That is interesting, I have to check if my PIC has this inverter bit,
didn't know about that.
I like that 2 transistor solution from the scienceprog website as
well. I actually thought about doing something like that but I wasn't
sure if you can always assume Tx is negative when idle.
My eye fell
I'm with John, if it for personal purposes, and the run is short
(<10ft/3m), you don't need to strictly adhere to the RS-232 spec. Just a
pair of transistor inverters, and label the connectors, "Mickey-Comm", and
you may just get away with 0-5V. Scope it, at your max intended baud rate,
just t
Yes, I'll give it a shot. My PIC indeed has invertable USART ports so
I'm going to hook it up just like that without transistors but just a
few series resistors. The cable is only short. If it doesn't work
(which I doubt), I can always use that $3 ebay interface that Dalibor
was talking about. I re
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