Home › Forum › Hardware › High readings on my KIT1 dosimeter.
This topic contains 6 replies, has 2 voices, and was last updated by radhoo 3 months, 1 week ago.
Hello, i’m building a simple weather station on Raspberry Pi 3 here, but strange high reading are present every day. I try with different values of compensation capacitor and different GM tubes, same result.
type:5 hw:101 sw:114 SBM20
PWM and High Voltage are stable (380+-1V, PWM 35% – constant), supply voltage is also stable and clear. Cathode and anode network traces are short as posible.
No Idea why is that happening, any help is appreciated.
Thanks in advance!
Amazing construction. Basically you’ve re-designed the model A. Would you post about this on the blog (www.uradmonitor.com/blog) or should I do it?
Readings seem fine.
Some additional files for Your Blog
T6, T3 = MMBT2907A PNP 60/60V 600mA 0.225W 45/100nS
T2 = SST2222A NPN 75/40V 600mA 0.2W hfe 75 300MHz 25/60ns
T1 = MMBTA42 SMD NPN 300V 500mA 0.225/0.3W
vOLTAGE REGULATOR = BA033CC0FP 3.3V±2% 1A, LDO 0.5V, Vinmax=25V
C6, C10, C11 = SIZE 1210 10nF 1000V X7R 10nF 1000V X7R +-10%
D2, D3, D4 = US1M 1000V 1A UFM1.7V/1A IFM30A IR10uA 75ns, Ultra Fast
All others C, R are size 1206 SMD
… and images
Thank you, I will put them together in a nice article. The last two pics are too small, do you have higher res?
Last two images…
Thanks for the pictures, and congrats – You’re now featured on the blog’s first page: http://www.uradmonitor.com/kit1-screenless-variant/
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