Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Problem is almost solved but not quite. I have a USB-to-TTl converter and it gives me +5 volt at pin 2 and 3 with respect to pin 5. I have added a MAX3232 rs232-TTL converter and now I am having -9 v at pin 2 with respect to pin 5 and 0 at pin 3 but I need revers. I mean I need pin 3 to be at -9...
Device works with COM1 of my desktop computer and also with COM1 of my old heavy laptop. This means it comply with RS232. As far as I know COM1 is RS232. I checked voltages of pin 3 with respect to pin5 in both COM1 ports in idle condition. On my desktop it was -11 v and on my laptop it was -7...
Hi All,
I have purchased a few USB to RS232 converter but non of them couldn't give me exact COM port of a desktop PC. In my desktop PC running windows xp voltage of pin 3 of COM1 with respect to 5 (Ground) is -11 v when you turn the PC on and nothing connected to COM1 measuring ohmeter and...
Anyone has these ISO files for mixed gas analysis? Our detector uses mixed gas and I need to know about ISO standards for repairing electronic boards of the detector.
thx
I can't find AD848JR (SMD) in local market. It has been used in a pre-amplifier circuit and since it is burned I need to replace it. Any suggestion for replacement?
thx
Simple schematic of the whole system is attached. Voltage of pin3 manually set depending what Kv we want at the end. OP07 output adjust the thyristor fire angle to generate proportional kv at the end. From produced Kv at the end a feedback returns to pin2 which will be equal to pin3 if output...
I have an idea:
I want to install a 2.75 zener diode between point X and ground. This way I will force point X to stay at 2.75 v and will have a stable pre-start condition. I will not be able to go to start condition but at least will prove stable 2.75 v at point X is the problem. I want to...
Nice explanation but honestly with my poor electronic knowledge I should say I didn't get much what to do. Could you please put it in a stepwise procedure what should I do to get close to the problem.
To me and to make it simpler since voltages of pin2 and pin 3 are known (0.03 and 0.1) one...
I am also thinking so but the stupid Siemens document says output should be 2.75 v and this puzzled me too. I am not very good with circuits. Probably parts around the OP07 somehow should decrease the gain and prevent this. This is what I am trying to find.
In normal operation (in closed loop...
umsch1 and umsch2 are not relevant in this stage so forget these.
Adjustments mentioned in post #6 also is not relevant in this standby stage.
Component are OK.
Haven't done simulation. I am not good in electronic and electronic circuits simulation.
For the moment important things are : pin2...
With precise look at the documents it shows pin 2 voltage should be 0.0 and pin 3 voltage should be 0.1 v which is almost the same voltages I have measured. Also document shows with these inputs there should be 2.75 v at the output but we have 14 v. This shows we have a faulty parts here. Any...
@ FvM
You are right. I haven't include the whole circuit because close loop control has not started yet at this stage. There is an "On" button (not presented here) which by pushing it R1 and R2 will have real values and closed loop control will start and from point X regulating signal will go...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
