• on Test & Measurement
  • Published in issue 9/2008 on page 26
About the article

Ball & Beam for Elektor USB DAQ Card

Grind your teeth on PID design and programming

Ball & Beam for Elektor USB DAQ Card
Like it or not, Ball & Beam is a compulsory item on the Electronics Engineering curriculum, specifically for classes on PID (proportional-integral-derivative) control systems. The idea is to try to balance a ball on a beam using a control loop. If the ball is pushed, the system moves the beam to return the ball to its initial position. So let’s get out our USB DAQ card and a PC to show off!
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Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor Members can exclusively download these files for free as part of their Membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service. Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.

R2 = 120k
R1,R7,R12 = 1k
R3 = 10
R4,R5 = 47k
R6 = 220k
R8,R9 = 2k7
R10 = 270k
R11 = 1k5
P1 = 5k preset
C1 = 22µF 16V radial
C2 = 100µF 16V radial
C3,C6,C7,C8 = 100nF
C4,C5 = 100nF
D1 = LED, low current, 3mm
T1 = BC557B
IC1,IC2 = TLC555 or ICM7555 (do not use plain 555)
K1,K3,K6 = 10-way boxheader
K2,K5 = 2-way SIL pinheader
K4 = 3-way SIL pinheader
PCB, ref. 080002-1 from www.thepcbshop.com
PCB artwork, free download

Project software, free download

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