Circuit arrangement for magnetic field generation
arrangement for magnetic field generation
O. I. Olusola* and K. D. Adedayo
Journal Title:Journal of Chemical, Biological and physical sciences
An electrical circuit that is capable of producing a magnetic field of different strength using inductors of different
inductance value have been designed and developed. The circuitry includes an electromagnetic coil for generating
a magnetic field in response to a direct current (DC) power applied to the terminals of the coil and a gated triac
connected in series with the coil for controlling application of direct current (DC) electric power to the coil. A 555
timer circuit is connected in an astable mode to serve as a gating circuit that develops a sequence of gating pulses.
These pulses have a substantially constant voltage that extends for specified time duration to continuously excite
the coil with DC power during the length of each pulse from the output of the clock circuit. Incorporated inside the
circuit is also a microcontroller with a Liquid Crystal Display (LCD); the LCD shows the value of the magnetic field
generated when each of the iron core inductor is selected and activated via the press to make switches labeled
S1.0 -to- S1.4.