Recent content by kurt

Thank you for your follow up sophiecentaur. Rethinking about it, I got another reasoning out of your reminding me taking the average of velocities (or simply the average velocity). In calculating the average velocity of several known paths of d1 to dn with known times t1 to tn, but with unkown...

Hi sophiecentaur, thank you much for your comments..

There are n people with masses mn . Each run up a given slope of height h in times tn. Gravitational accelartion, g, is constant. Now there are 2 ways to calculate the average power of this group of people with 2 different results. The question is which way of calculating the average power...

i built the circuit exactly the same way as given on the datasheet. first i supplied power with +/-18V thinking that it should be fed somehow. i got the constant output +18,11V with the laser blocked or unblocked. then i removed all the batteries, and the reading was about 26mV on daylight in...

On one pair I exceeded by half the volt and it was just below 18V on the other pair. Right... then i will run the LM308 off of +/-9V batteries on monday and see the readings again. Thank you much...

thank you much berkeman for your reminding since i ran it first on +18V with no result. i applied the split power +/-18V (with four 9V batteries) and this time it amplifeid the 1,4 mV to 1,346V that is about 1000 times though it was supposed to amplify only 100 times with 100k/1k = 100. i think...

yes, i searched for voltmeters with more digits but they cost a lot. on the other hand i followed the link you gave to check the specs, but noticed an "amplifier for photodiode sensor" circuit, that was a direct solution so i built it with my fds100 photodiode and a red laser beam (ca. 620 nm)...

Hi, I measure the output from my circuit between 0,1 mV to 0,8 mV at 200mV setting on my digital voltmeters. How can I measure it more sensitively at least 100 times, or amplify it 100 times so that I can know the values such as 0,427mV instead of 0,4mV? I tried it using a differential...