I have a question about the "Button" connection for the Zener expansion option. Should the gate of T4 be tied directly to PD7, or is there supposed to be a button switch between the two, or something else?
knowing what you all know about the testers available on e----, if you had your choice on which one to buy and it can be updated and will work, which one would you buy?
I would appreciate a particular one and not just anyone will work. I don't want to guess and get the wrong one or one that does not work or can't be updated.
Hi everyone,
Can someone please confirm that mk-168 unit is indeed m328 and supports firmware upgrades? I really want to buy one, but I want to make sure I got that covered first.
Thanks!
Hi everyone,
Can someone please confirm that mk-168 unit is indeed m328 and supports firmware upgrades? I really want to buy one, but I want to make sure I got that covered first.
Thanks!
The video doesn't show what's under the LCD, so you can't tell from the video alone. The board also seems to be single sided--most singled sided versions of the board don't seem to have a programming header. Since it has "168" in the name, my guess is it uses the ATmega168 rather than Atmega328. I would look for another variant.
Hi everyone,
Can someone please confirm that mk-168 unit is indeed m328 and supports firmware upgrades? I really want to buy one, but I want to make sure I got that covered first.
Thanks!
Great! Ordering now...
Does anyone have any experience with these variations that are popping up on ebay?
I don't really have any reference standard to compare it to but it seems to measure and identify any passive I can throw at it.
Downside is the software isn't open any more :-(
Downside is the software isn't open any more :-(You mean Transistor Tester is not an open source anymore?
Downside is the software isn't open any more :-(You mean Transistor Tester is not an open source anymore?
So, my MK-168 unit came in today. The build quality is pretty nice overall; it uses an AT328P in a socket, with no footprint for an ICSP header. Looking at the board it seems to have been designed late last year. Some markings on the board: M168_V2.20, M8/168/328_9V_V2.20, 2013.10.16, EZM Electronics Studio.
The one real problem I found was C3 and R11 only being soldered on one side. (Looks like the missing solder was on the ground side, which even took my iron a few seconds to heat up, so I suspect whatever worker made this board didn’t have their iron hot enough.)
Another thing I noticed was the lack of a Zener diode, which I thought was required for a voltage reference? The other thing of note is SMD capacitors C1 (missing), C6, C7 and C8 on the back. There’s plenty of board space on the front, so I thought that was a weird decision. The last oddity is what appears to be a bodge resistor connecting pin 2 of the ATmega to VCC.
The package came with what you’d expect, the unit in a case, three test leads and a ZIF/SMD adapter. In addition to the standards the seller also threw in a power cable for rigging up your own external supply and an extra power connector (not sure what’s up with that).
Another thing I noticed was the lack of a Zener diode, which I thought was required for a voltage reference? The other thing of note is SMD capacitors C1 (missing), C6, C7 and C8 on the back. There’s plenty of board space on the front, so I thought that was a weird decision. The last oddity is what appears to be a bodge resistor connecting pin 2 of the ATmega to VCC.