Creation date: Mon 25 Feb 2013 10:43:56 PM PST
Revised:  Thu 27 Mar 2013

ECB dual SD I/O board, rev. 1.01

  * = change from rev. 1.00

#Cmp ( order = Reference )
| C1         47uF      * ; was 22uF -- increase to 47uF to 100uF electrolytic
| C2-C22     .1uF        ; qty 21, monolithic or ceramic (21 places)
| C39        4.7uF     * ; was 1uF -- increase to 4.7uf to 10uf electrolytic
| C40        33nF      * ; 0.033uF (up to 0.1uF) ceramic or monolithic (may use same as C22)           
| D1,D2      LED         ; 5mm or 3mm LED (2 places)            
| D3         1N4148      ; best is BAT43, 1N914, 1N5820 (Jameco 177973)           
| K1         C96ABC      ; 96-pin DIN connector, male, rt angle (Jameco 859430)           
| K2         CONN_3      ; 3-pin jumper block from a single row snappable header            
| P1,P2      SDCARD-MINI_03;  SD card socket, top mount, Digikey (FCI or TEconn) and Mouser have them           
| P3         CONN_6X2    ; no component installed here (see configuration instructions)            
| P4         CONN_6X2    ;  "     "        "       "
| P5         CONN_7X2    ; 7x2 jumper block from a double row snappable header             
| P6         CONN_3X2    ; 3x2 jumper block from a double row snappable header             
| R1,R2      330         ; 330 ohm 1/8w 10%
| RR1        1000        ; 1K ohm bussed (7-10 pin package)           
| RR2        10K         ; 10K ohm bussed (4-10 pin package)           
| RR3        47K       * ; 47K ohm bussed (9-10 pin package) (22K...47K okay, higher the better)           
| U1         LP2950-3.3  ; TO-92 3.3v regulator 100ma  (Jameco 1323397)
| U2         74LS00      ; 2-input NAND            
| U3         74LS86      ; 2-input XOR             
| U4,U5,U6   74LS38      ; 2-input NAND, open-collector (DO NOT USE CMOS)            
| U7,U11     74LS175     ; quad D-flop            
| U8,U10,U13  74LS244    ; 8 wide bus receiver/driver, true, tri-state            
| U9,U12     74LS157     ; quad 2-line to 1-line mux (U9 MUST be ALS or LS!!!)
| U14        74LS240     ; 8 wide bus receiver/driver, compl, tri-state            
| U15        74LS682     ; 8 wide comparator            
| U16        74LS138     ; 3-line to 8-line multiplexor            
| U17        DIL20       ; spare position (no component)            
| U18        DIL16       ;   "     "            
#End Cmp

#End List