Forum: Equipment Usage, Soldering, Techniques, and Reviews
08-07-2022, 04:43 PM
|
|
Replies: 112
Views: 23,220
|
|
Forum: Equipment Usage, Soldering, Techniques, and Reviews
08-07-2022, 03:24 AM
|
|
Replies: 112
Views: 23,220
|
|
Forum: Equipment Usage, Soldering, Techniques, and Reviews
08-05-2022, 11:01 PM
|
|
Replies: 112
Views: 23,220
|
|
Forum: Equipment Usage, Soldering, Techniques, and Reviews
08-04-2022, 03:47 PM
|
|
Replies: 112
Views: 23,220
|
|
Forum: Equipment Usage, Soldering, Techniques, and Reviews
08-03-2022, 08:52 PM
|
|
Replies: 112
Views: 23,220
|
|
Forum: Equipment Usage, Soldering, Techniques, and Reviews
07-02-2022, 09:34 PM
|
|
Replies: 154
Views: 21,447
|
|
Forum: Equipment Usage, Soldering, Techniques, and Reviews
07-02-2022, 09:03 PM
|
|
Replies: 154
Views: 21,447
|
|
Forum: Equipment Usage, Soldering, Techniques, and Reviews
07-01-2022, 02:16 AM
|
|
Replies: 154
Views: 21,447
|
|
Forum: Equipment Usage, Soldering, Techniques, and Reviews
06-30-2022, 07:20 PM
|
|
Replies: 154
Views: 21,447
|
|
Forum: Equipment Usage, Soldering, Techniques, and Reviews
06-29-2022, 03:51 PM
|
|
Replies: 15
Views: 689
Re: Short finder
No need :wink:
The current source problem arises from using the 5V output line from the Arduino Nano.
As he wrote somewhere he couldn't figure out why the voltage (5V) dropped when the tips were...
|
|
Forum: Equipment Usage, Soldering, Techniques, and Reviews
04-18-2022, 09:05 PM
|
|
Replies: 26
Views: 2,107
Re: Analog Multimeter Readings
Yes there are some Notitake datasheets and even some Arduino libraries available. For Noritake VFD PW-899-101 (Noritake Itron GU140X16G-7000 Dot Graphic VFD Display Module) the Arduino library...
|
|
Forum: Equipment Usage, Soldering, Techniques, and Reviews
04-18-2022, 02:22 PM
|
|
Replies: 26
Views: 2,107
Re: Analog Multimeter Readings
That's what i described you would most likely find onboard a VFD.
A µC scanning (multiplexing) the vfd (most likely thru an IC because voltage levels) and a serial (often 3 wire) interface...
|
|
Forum: Equipment Usage, Soldering, Techniques, and Reviews
04-16-2022, 01:27 PM
|
|
Replies: 26
Views: 2,107
Re: Analog Multimeter Readings
As i recall they used a multiplex scan circuitry IC (maxim i believe) connect to a µC. You might get better luck disassembling it and walking your way thru.
imo it's to expensive for the specs,...
|
|
Forum: Equipment Usage, Soldering, Techniques, and Reviews
04-14-2022, 02:43 PM
|
|
Replies: 26
Views: 2,107
Re: Analog Multimeter Readings
The pictures may help...
Test leads are unconnected (Needle in rest position):
VOM: ∞Ω -> Correct
VTCOM: 0Ω -> Incorrect
DMM: 'OL' = ∞Ω -> Correct
|
|
Forum: Equipment Usage, Soldering, Techniques, and Reviews
04-13-2022, 06:27 PM
|
|
Replies: 26
Views: 2,107
Re: Analog Multimeter Readings
How come...? Take an example where the test leads are unconnected: both VOMs and DMMs will read 0 in V & A and 'infinite' or 'OL' in Ohm > Correct.
Unlike Vacuum Tube VOMs (VTVOMs) that will read 0...
|
|
Forum: Equipment Usage, Soldering, Techniques, and Reviews
04-09-2022, 04:25 PM
|
|
Replies: 26
Views: 2,107
Re: Analog Multimeter Readings
It all comes down to basic stuff, much like riding a bike...:smile:
Of course digital tends to be more direct forward making readings because we don't have to pay attention to the multiply knob...
|
|
Forum: Equipment Usage, Soldering, Techniques, and Reviews
04-07-2022, 06:15 PM
|
|
Replies: 203
Views: 100,916
Re: CH341a SPI / I²C programmer
Yes i meant an oscilloscope, but a multi meter (if with enough samples /s) set to V would work, or instead set to frequency reading.
That's good news :d
No ridiculousness involved. Sometimes...
|
|
Forum: Equipment Usage, Soldering, Techniques, and Reviews
04-06-2022, 11:54 AM
|
|
Replies: 203
Views: 100,916
Re: CH341a SPI / I²C programmer
Since the programmer, CH341A, is recognized both by OS and the software the CH341A isn't dead.
Because you've done the 3.3V voltage supply tweak if any input/output pins came in touch with 5V most...
|
|
Forum: Equipment Usage, Soldering, Techniques, and Reviews
04-05-2022, 11:14 AM
|
|
Replies: 203
Views: 100,916
Re: CH341a SPI / I²C programmer
Pins 6, 7, 8 are input pins and left floating in CH341A programmer.
See the attached schematic and try to figure out what's wrong (though there are several versions available).
|
|
Forum: Equipment Usage, Soldering, Techniques, and Reviews
03-20-2022, 09:48 PM
|
|
Replies: 18
Views: 1,596
Re: Anyone ever hear of this solder brand before?
According to the label we can only tell it contains flux type P2 > hence Rosin.
As for percentage it's unspecified.
It's a little worse... if "Val." stands for "valid / validity" as it should,...
|
|
Forum: Equipment Usage, Soldering, Techniques, and Reviews
02-19-2022, 02:36 PM
|
|
Replies: 5
Views: 851
Re: New Laser Soldering tool
Nothing else than a fool guy playing with dangerous a new toy :duh:
Even by the way he uses the tweezers, picking up discrete components by the soldered ends, one can tell he's :noob:
|
|
Forum: Equipment Usage, Soldering, Techniques, and Reviews
02-02-2022, 04:47 PM
|
|
Replies: 13
Views: 1,581
|
|
Forum: Equipment Usage, Soldering, Techniques, and Reviews
01-01-2022, 10:51 PM
|
|
Replies: 26
Views: 2,842
|
