I have spent some time putting together a firmware to enable Power Down sleep mode in ATtiny441. The examples on the web did not do the trick out of the box. Here is my code with some leftover bits for enabling / disabling peripheral devices when they are used. The MCU goes to Power Down… Read More »
UPDATE 2018-11 My unit has developed a huge 6A DC current offset a while ago. This is my last sort-of-working Mastech instrument, certainly will not buy anything this brand again.. The warning of wrong banana input started misbehaving in my MS2115A meter. I opened the meter and before I even started to fix, it was… Read More »
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
A summary of serial commands for the Velleman PS3005D lab power supply:
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’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.