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 on: May 09, 2021, 01:47:09 01:47 
Started by Kombinator - Last post by Kombinator
An attempt to Login the site from outside China failed.
The site returns-
Now I receiving the command from China Govement, this website contains illegal information and needs to be rectified. The login and registration will be closed temporarily, or this website may be shut down forever. Any questions, please email to [email protected], back to home(2021.4.29)

Is it forbidden for Chinese users to log in?

 on: May 08, 2021, 03:59:46 15:59 
Started by Sideshow Bob - Last post by kreutz
I can't see references about any standalone serial eeprom programming feature in the PK4 documentation.

 on: May 07, 2021, 01:31:05 13:31 
Started by Sideshow Bob - Last post by Sideshow Bob
Up to now I have used the standalone software and PK3 for serial EEPROM programming. But my PK3 has been kind of wonky lately. I think it is time to get a new programmer. If I get a PK4 will I still be able to program serial EEPROMs in some way?

 on: May 06, 2021, 01:03:01 13:03 
Started by zac - Last post by Sideshow Bob
You are wrong about the input range. It is not 500 volt. Read the manual

 on: May 06, 2021, 05:58:55 05:58 
Started by max - Last post by pushycat
Hi friends,
I need a lead acid battery charger to charge a 200ah battery, the charger should be non-switch mode type, and the charger transformer is controlled by the primary side.

The original post is from 2009 and presuming some one may need similar circuit and the need is for a 12 volt charger, this kit is widely manufactured in China and in use at my end and may be many parts of the world too. It is simple and easy to understand. Controls the primary side of the charging transformer and keeps monitoring the battery voltage. As the voltage reaches pre-set level, it switches a relay which in turn switches the primary side of the transformer and starts charging. As the voltage reaches the cutoff level, it switches off the relay thus switching off the primary side of the charging transformer.

 on: May 06, 2021, 03:42:47 03:42 
Started by zac - Last post by Johnny
Another option, modify your voltage monitor. Do a quick reverse engineering of the input. The input on that will have a voltage divider. Replace upper resistor with a suitable trim pot and adjust the measured value.

 on: May 05, 2021, 07:33:16 19:33 
Started by boba - Last post by Just4Fun
Hi, if you like VT100-like terminals I've done a VT100-like terminal with RS232 and a "transparent" port to attach a common serial-USB adapter.

The project page is here.

 on: May 05, 2021, 06:57:55 18:57 
Started by zelea2 - Last post by zelea2

QCAD is a powerful 2D CAD system with an intuitive user interface.

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  • Printing on multiple pages
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  • Part library with over 4800 CAD parts
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  • Command line tools (dwg2pdf, dwg2svg, dwg2bmp, etc.)
  • QCAD/CAM: G-Code export, Nesting


If you plan to use this software with a CNC machine and generate NC code
from your designs choose QCAD/CAM, otherwise choose QCAD Professional

Choose the version most suited to your operating system and run the installer.
Executables are already patched.

 on: May 05, 2021, 06:41:14 18:41 
Started by zac - Last post by Manuel
 Grin LTC1966

take care,

 on: May 05, 2021, 06:25:26 18:25 
Started by zac - Last post by kreutz
use a 10 Mohm voltage divider with an opamp half or full wave rectifier, another opamp  as a buffer to feed the low impedance monitoring device. the 0-5 Volts output will be the input rms value Divided by 100. But you will need a power supply for the opamps anyways. 

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