Search found 16 matches

by bratan
Wed Jan 16, 2013 12:02 pm
Forum: Geiger Counter
Topic: Reistor value for iPhone cable
Replies: 3
Views: 8770

Re: Reistor value for iPhone cable

Ok I did some more research, and it seems to me that you just need to bring voltage close to 50mV right? If I use voltage divider calculator correctly in your circuit you are getting Vout of about 53mV. So if I use R1=10K and R2=200 I will get Vout=59mV. Would this work? Tomorrow I'm getting iPhone ...
by bratan
Wed Jan 16, 2013 8:16 am
Forum: Geiger Counter
Topic: Reistor value for iPhone cable
Replies: 3
Views: 8770

Reistor value for iPhone cable

Quick question about iPhone adapter for Geiger Bot.
You are using 56K resistor. Would it work with other values such as 30K or 100K? I don't have any 56K resistors in my lab unfortunately :(
by bratan
Tue Jan 15, 2013 6:20 pm
Forum: Geiger Counter
Topic: Interfacing with Arduino Uno R3
Replies: 13
Views: 57830

Re: Interfacing with Arduino Uno R3

Awesome, I'm sure I will figure it out! Thanks!
by bratan
Sun Jan 06, 2013 7:12 am
Forum: Geiger Counter
Topic: VR setting for SBM-20
Replies: 2
Views: 6759

Re: VR setting for SBM-20

Awesome, thanks!
by bratan
Sat Jan 05, 2013 6:27 am
Forum: Geiger Counter
Topic: Interfacing with Arduino Uno R3
Replies: 13
Views: 57830

Interfacing with Arduino Uno R3

Any tips, advise or links on how to communicate with UNO R3 directly? :) I have one with SD Logger shield, would love to figure out how to log data from Geiger counter without computer.
by bratan
Fri Jan 04, 2013 4:05 pm
Forum: Geiger Counter
Topic: VR setting for SBM-20
Replies: 2
Views: 6759

VR setting for SBM-20

What's the best VR setting for SBM-20 tube? :) I followed tutorial, but it's kind of beeps even at the lowest setting. From what I understand VR1 sets high voltage, but I currently don't have gigaohm resistors on hand to measure it...