Projects in the April 2002 issue of EPE Magazine | |
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![]() - a simple but highly effective way of controlling 4-phase stepper motor positioning manually, using a rotary switch. Enables you to operate a wide range of mechanisms - great for robotics and control applications! Bidirection operation, end-of-travel detection via magnetic reed switch. Full details of stepper motor adaptation are included. |
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![]() - always a popular project amongst musicians, our latest Guitar Tuner project is very straightforward to build and uses a simple flashing l.e.d. to indicate the difference between the guitar's frequency and the target frequency. When the l.e.d. stops flashing, the correct note has been tuned. (Separate reference frequencies are needed for initial set-up.) Battery operation, ideal for inexperienced constructors. Build this design now and stay in tune! |
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Also in this issue - Programming PIC Interrupts (2) - the concluding installment of our mini series detailing the techniques to use Interrupts successfully with your PIC programs. Circuit Surgery - the perils of testing with grounded power supplies. Ingenuity Unlimited - more readers' ideas. New Technology Update on the latest FinFET devices. Interface - PC serial port interfacing. Review - Electronic Principles V7 CD ROM. Free op.amp wallchart in this issue. |
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