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kaspar (kinsa) esr meter

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peter g

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hi, I was on krypton 2035 esr meter site. I saw the above meter, and I would like to build it. I,am confused as to what gender of led display. is it supposed to be commom cathode or common anode? the notation on the shematic says they are common anode, but if you look up the part number shown it shows a common cathode type. which is right?(kaspar/kinsa meter)
 

hi,
thanks for watching my esr repository.

in the source code, you can see
Code: 
-- LED display routines
const byte SSEG[] = {   0b00111111, -- 0, LED Segment: A,B,C,D,E,F
                        0b00000110, -- 1, LED Segment: B,C
                        0b01011011, -- 2, LED Segment: A,B,D,E,G
                        0b01001111, -- 3, LED Segment: A,B,C,D,G
                        0b01100110, -- 4, LED Segment: B,C,F,G
                        0b01101101, -- 5, LED Segment: A,C,D,F,G
                        0b01111101, -- 6, LED Segment: A,C,D,E,F,G
                        0b00000111, -- 7, LED Segment: A,B,C
                        0b01111111, -- 8, LED Segment: A,B,C,D,E,F,G
                        0b01101111, -- 9, LED Segment: A,B,C,D,F,G
                        0b01110111, -- a, LED Segment: A,B,C,E,F,G
                        0b01111100, -- b, LED Segment: C,D,E,F,G
                        0b00111001, -- c, LED Segment: A,D,E,F
                        0b01011110, -- d, LED Segment: B,C,D,E,G
                        0b01111001, -- e, LED Segment: A,D,E,F,G
                        0b01110001  -- f  LED Segment: A,E,F,G
                     }

so it outputs 1 to light up segments on the led displays
so it is necessary the anode of the leds that is on the abcdefg side
so according to the source code it needs common cathode displays.

and if you look at the HD-H103 display datasheet referenced in the schematic,
you see it is a 14.2 mm Common Cathode display

so nothing toworry about, it is a common cathode display.
 

hi krypton, I,ve built the kinsa meter. I made the 16f690 c.a. version. I have two problems with it. one, all three displays have a tendency to flash. second, I get an Err display when I try to calibrate it. BTW, has anyone made a working model of this design, other than the author? thanks for any help.
 

can you post a picture of your work ? both component side and copper side if you did a pcb . thk
 

hi krypton, thanks for your response. I,ve found a few errors in wiring. will make corrections and get back to you. thanks again. pg
 

peter g said:
hi krypton, thanks for your response. I,ve found a few errors in wiring. will make corrections and get back to you. thanks again. pg
Click to expand...

o.k., I,ve fixed wiring errors. was able to calibrate. however,two problem exist. when I try to zero, I get an error message. if I don,t get an error message I get a flashing O.L. also measuring low ohm resistor inaccurate. i.e. 10 ohm resistor meas good, 1 ohm resistor meas .5 ohm. will try to get you some pictures. btw I,ve built many projects, so I do have experience. I was a Philips tech for many years.
 

did you follow the calibration procedure ?
did you see there is a table at the end of the source code that you must fill yourself with the measured values ?

by the way, no offense, but I made a lot of projects myself (not this particular esr meter anyway) and I'm always amazed when a project does not work
of the tiny little something that I forgot and that make the thing not working. and I always search for it a long time ...
I'm getting better because the last 2 projects worked at first power on !
good luck.
 

hi again, you have to use the table only if your going to do a full calibration. I didn't mean to imply that I'am infallible, I just thought you should have some idea of my level of expertise, since i'am asking for your help. ok, the part that's frustrating is the esr meter works 90%. I can calibrate it to get 4cf. then when I go to zero it, I get the leds flashing or err. I scoped some the signals and the only signals that are affected when I short the input are the signal to the leds. all other signals are fine? i'am trying to figure out what the correlation is between shorting the input and the signal going to the leds. anyway, I've checked the pcb and all the componets for proper placement and value and have found no discrepancies and have found none. I must admit i'am ready to throw in the towel.
 

hi,
sorry but if you cannot short the leads and get the zero at the calibration procedure, it seems that you have another mistake in the circuit that prevents it to get the zero ohm.
did you use the pcb on the site or cable your own on a perf board ?
anyway good luck.
 

greetings from s. florida, I made the pc board. well, I'll keep working on it. I found a candidate for your repository, will post soon.
 

My Version Also added LOPT tester and
PCB designed to Fix On Hammond Case 1553BTBUBKBAT
 

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zubusha said:
My Version Also added LOPT tester and
PCB designed to Fix On Hammond Case 1553BTBUBKBAT
Click to expand...

hi, so you successfully built the kinsa meter? i'am interested to know what problems you encounted. did you make the cc or ca version?
 

peter g said:
hi, so you successfully built the kinsa meter? i'am interested to know what problems you encounted. did you make the cc or ca version?
Click to expand...

It's CA Version, I Didn't En-count Any Problem,
All My Files Are Here,

It's Fun.. Enjoy..
 

zubusha said:
It's CA Version, I Didn't En-count Any Problem,
All My Files Are Here,

It's Fun.. Enjoy..
Click to expand...

wow!!!! super. I made the lopt(flyback ringer) also. did you make any mods or modify the code? I had a lot of trouble calibrating it. also what leads did you use? I made the ca version also.
 

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