Photos of the Circuit for Experiment 6
Note that the images on this page are best viewed in 32k colours
(or more) as they are based on photographs.
Component Side of board
Note that the 741 Op-Amp is an ‘IC Holder’. This is a type of socket that ICs can be plugged into. The socket makes soldering easier, and being cheaper than an IC, saves money by allowing us to reuse the 741’s. Note that no ‘Earth’ connection is shown. The 741 is powered from ±15 V d.c. lines. The ‘earth’ connection will be either A or B depending on which part of the experiment you are carrying out. Make sure you plug in the 741 the correct way around. It should have either a notch at the ‘top’ end (between pins 1 and 8) or a ‘spot’ near pin 1. Have a look at the 741 package diagram in the labscript if this isn’t clear to you. (The holder may also have a notch, but it doesn’t really matter which end this is.)
Track Side of board
Note that you will have to cut the tracks between the pins on each side of the IC holder. If you don’t, pairs of pins will be connected when they shouldn’t and the circuit won’t work!
Click here to go to the explanation of the experiment.
Content and pages maintained by: Jim Lesurf (jcgl@st-and.ac.uk)
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University of St. Andrews, St Andrews, Fife KY16 9SS, Scotland.
