Hi,
I compiled (again...) firmware 1.34m for AY-AT tester, this time with AS7 v7.0.1931.Then I calibrate the AY-AT and save.
I attached all atmel studio folder zipped.
When I test components, R, L and C looks reasonable(22pF,12nF,22nF,22uH,100uH,&K,10K,100K,33K,, but if I test my reference DB237 npn transistor , it shows as UJT.
The tester has 17 cm wires with crocodile endings and I can state I'm very thorough in manipulating the thing.
Calibration and measuring is done with programmer disconnected.I used a linear power supply to power the ay-at (12V, the tester reports 12.04V).
I think something is clearly wrong.
Anyone sees the same behaviour?
If I reprogramm the tester with v1.29 fw (together with .eep file, a saved .eep file after calibration), the transistor detection returns to normal, detected as BJT npn, hFE=58, Vbe= 716 mV.
In order to be perfectly clear, if I leave the transistor connected and I just write .hex+.eep files v1.29m works, v1.34m and v1.33m fail with transistor npn detection.
I appreciate all the work, but I want to point also when something doesn't work (I did 5 years of hardware testing in electronic research& developemment company and have tested
lots of DSP/microcontroller boards with same 'jobs' like voltage/current measuring, adc's , temperature control, laser positioning/ detection, I mean I don't blow the whistle for nothing).
Hoping what seems to me a major issue with the detection rutine will be taken serious, best regards ,
Pierre