ON 20040708@1:50:19 PM at page: http://techref.massmind.org/techref/io/d2a.htm#38176.5765972222 James Newton[JMN-EFP-786] See also: http://www.beis.de/Elektronik/DeltaSigma/DeltaSigma.html a delta sigma converter, which was invented by Philips in the 60's ON 20040711@10:08:58 PM at page: http://techref.massmind.org/techref/io/steppers.htm#38179.9228935185 James Newton[JMN-EFP-786] Says http://techref.massmind.org/techref/io/quickstep.htm ON 20040711@10:09:32 PM at page: http://techref.massmind.org/techref/io/steppers.htm#38179.923287037 James Newton[JMN-EFP-786] Says /techref/io/quickstep.htm QuickStep ON 20040711@10:10:28 PM at page: http://techref.massmind.org/techref/io/quickstep.htm#38179.9239351852 James Newton[JMN-EFP-786] Says I've transcribed it to a standard list:
Qty     Type        Part    Spec            Form
------- ----------- ------- --------------- -----------------------
1       uC          IC2     PIC '877        DIP
                              
1       socket      IC2s    40 PIN 0.6"     DIP
                              
12      transistor  Q1-Q12  MOSFET N 60V 5A 2-7B1B
Populate the FETs Q1–12 with the tab above the white bar.
                              
1       transistor  Q13     NPN BJT         TO-92
                            600ma 40V  
Installed with the flat side as indicated on the PCB

                              
1       capacitor   C1      1000u 50V       5mm lead spacing
                              
1       capacitor   C2      10u 25V         2mm lead spacing
The polarized capacitors with the plus sign on the same side as the plus sign silkscreened on the board.
                              
2       capacitor   C3,C5   22p 100V        6.35mm lead spacing
Little dull brown disk
                              
1       capacitor   C4      0u1 50V         5mm lead spacing
Really little shiny brown disk

                              
13      resistor    R1-12,  1k 5%           1/4W
                    R17     brown-black-red-gold
                              
1       resistor    R13     10k 5%          1/4W
                            brown-black-orange-gold
                              
2       resistor    R14,R15 330 5%          1/4W
                            orange-orange-brown-gold
                              
1       resistor    R16     5.1R 5%         5W
WIREWOUND Additional units included to tune certain stepper motors. Ignore extras.
                              
1       osc         XT1     4 MHz           HC-49

                              
14      diode       D1-12,  800V max        DO41
                    D13,D14
The diodes are installed with the band above the white band, 
                              
                              
1       LED         LED1    clear, 3mm      T1
Place the longer lead of LED1 in the hole marked with a plus sign.

                              
5       terminal    X1-3,   3pin terminal   0.2" SIP screw
                    Y1-3,   strip
                    Z1-3
The screw terminal blocks feature a dovtailed protrusion on one side and a dovetailed slot on the other; assemble five 3-terminal blocks together for the
connections to the motor
 

                              
1       header      SV6     pin header      0.1" SIP

                              
1       connector   SV8     HD, M 4pin Pwr  0.2" SIP



 

The connectors SV9 and SV10 are for future expansion and for in-circuit programming; they are not necessary for normal ON 20040711@10:15:07 PM at page: http://techref.massmind.org/techref/io/quickstep.htm# James Newton[JMN-EFP-786] edited the page. Difference: http://techref.massmind.org/techref/diff.asp?url=H:\techref\io\quickstep.htm&version=1 ON 20040711@10:27:44 PM at page: http://techref.massmind.org/techref/io/quickstep.htm# James Newton[JMN-EFP-786] edited the page. Difference: http://techref.massmind.org/techref/diff.asp?url=H:\techref\io\quickstep.htm&version=2 ON 20040711@10:40:25 PM at page: http://techref.massmind.org/techref/io/quickstep.htm# James Newton[JMN-EFP-786] edited the page. Difference: http://techref.massmind.org/techref/diff.asp?url=H:\techref\io\quickstep.htm&version=3