A few photos of my take on the Mastech MS8229 multimeter RS232 hack discussed at http://www.eevblog.com/forum/projects/mastech-ms8229-rs232-hack/. Basically, this adds PC data logging support. The SMD resistors, before hot glue
There is a nice tutorial about silencing mouse buttons at instructables. I have done the same on my MX Revolution, the difference is obvious. The screwdriver shows the tabs to press and bend. Put on some sticky tape on top of the button to hold the little pin in place.
I have just upgraded my Mastech HY1803D lab power supply with a 10-turn voltage adjustment potentiometer. In order to perform the upgrade, you would need a 6.8K potentiometer (at least the original is). The trickiest part is removing the knob from the old pot. It is glued on, use pliers, soft padding and some leverage… Read More »
I’ve just discovered an undocumented command of the Velleman PS3005D programmable lab power supply. This PSU is available as a number of clones like Korad KA3005P reviewed at EEVBlog. I don’t know much about the serial communication protocol in the other PSU variants, perhaps they are different.
Quick info on how to start disassembling a DELL 2209WAf monitor. No pictures this time, but perhaps it will help. Remove the stand and the 4 screws behind the stand. These are the only screws in the case Pry the front bezel off. Do the corner with the buttons last. You may leave the front… Read More »
This is my latest contraption. I made an AC power supply that can be controlled by the Yats test automatization software or any other tool that can send commands via a serial port. It provides 4 mains sockets that are controlled either through RS232 or manually using buttons. There is one isolated 220V and one… Read More »