Pulse Width Modulation By Michael Adler and Tim Surtell

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 Shopping List

Here is a list of the parts required to build the PWM circuit as shown in figure 2.

Part Description		Quantity Required		Rapid Code		Unit Price		Total Price
0.01μF Metallised Polyester Film Capacitor		2		64-2381		£0.44		£0.88
0.1μF Metallised Polyester Film Capacitor		2		64-2384		£0.32		£0.64
1kΩ 0.25W Metal Film Resistor		4		62-3450		£2.66 (per pack of 100)		£2.66
1N4148 Signal Diode		1		47-3416		£0.02		£0.02
220μF 16V Radial Electrolytic Capacitor		1		11-0261		£0.02		£0.02
220kΩ 0.2W Linear Potentiometer		1		65-0735		£1.67		£1.67
38mm Heatsink for TO220 Style Transistor Cases		1		36-0442		£0.45		£0.45
500kΩ Horizontal Cermet Potentiometer		1		67-0622		£0.43		£0.43
8-pin Dual-in-line IC Socket		2		22-1720		£0.43		£0.86
NE555N Timer IC (Standard 555)		2		82-0336		£0.82		£1.64
TIP31C High Power NPN Transistor		1		-		£0.00		£0.00
Grand Total								£9.27

Full printer-friendly parts list

Order the above items from Rapid Electronics via our Circuits Shop and help support the Electronics in Meccano website, without affecting the price you pay! Just click on an item for information about it and/or to add it to your Rapid order.

Orders can also be placed by telephoning Rapid on 01206 751 166 or visiting their website at www.rapidonline.com. Prices quoted include VAT at 20%.

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Article Information Topic: Controlling Motors | Created: 17/06/2003 | Last modified: | First published in EiM: Issue 6 (January 2000)

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