Editing Big Digit Driver Assembly Instructions
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|Type | |Type | ||
|Vendor | |Vendor | ||
− | |Part Number | + | |Vendor Part Number |
− | |Quantity | + | |Quantity per Board |
|---- | |---- | ||
|1 | |1 | ||
|N/A | |N/A | ||
− | | | + | |PCB |
|Big Digit Driver board | |Big Digit Driver board | ||
− | |Evil Mad | + | |Evil Mad Science LLC |
|N/A | |N/A | ||
|1 | |1 | ||
Line 22: | Line 22: | ||
|2 | |2 | ||
|R25 | |R25 | ||
− | | | + | |Current Sense Resistor for DP |
− | | | + | |22 ohm, substituting 24 ohm 1/4 watt carbon film resistor |
|Digikey | |Digikey | ||
|24QBK-ND | |24QBK-ND | ||
Line 29: | Line 29: | ||
|---- | |---- | ||
|3 | |3 | ||
− | |R1 | + | |R1 through R5 |
− | |68 ohm | + | |DP Load Resistors |
− | + | |68 ohm 1/4 watt carbon film resistors | |
|DigiKey | |DigiKey | ||
|68QBK-ND | |68QBK-ND | ||
Line 38: | Line 38: | ||
|4 | |4 | ||
|R11,R13,R15,R17,R19,R21,R23 | |R11,R13,R15,R17,R19,R21,R23 | ||
− | |16 ohm | + | |Current Sense Resistors |
− | + | |16 ohm 1/4 watt carbon film resistors | |
|Digikey | |Digikey | ||
|16QBK-ND | |16QBK-ND | ||
Line 46: | Line 46: | ||
|5 | |5 | ||
|R12,R14,R16,R18,R20,R22,R24,R26,R27 | |R12,R14,R16,R18,R20,R22,R24,R26,R27 | ||
− | | | + | |Base Resistors, Power LED Resistor |
− | | | + | |1k ohm 1/4 watt carbon film resistors |
|Digikey | |Digikey | ||
|1.0KQBK-ND | |1.0KQBK-ND | ||
Line 54: | Line 54: | ||
|6 | |6 | ||
|D1, D2 | |D1, D2 | ||
− | | | + | |Linear Regulator Load, DP Load (Diodes) |
− | |1N4740A | + | |1N4740A, 10V, 1 watt |
|Digikey | |Digikey | ||
|1N4740A-ND | |1N4740A-ND | ||
Line 62: | Line 62: | ||
|7 | |7 | ||
|U9 | |U9 | ||
− | | | + | |Socket for Shift Register |
− | |16 pin | + | |16 pin 0.3" Socket |
|Digikey | |Digikey | ||
|A100206-ND | |A100206-ND | ||
Line 70: | Line 70: | ||
|8 | |8 | ||
|U10 | |U10 | ||
− | | | + | |Socket for Schmitt-input buffer IC |
− | |14 pin | + | |14 pin 0.3" Socket |
|Digikey | |Digikey | ||
|3M5462-ND | |3M5462-ND | ||
Line 77: | Line 77: | ||
|---- | |---- | ||
|rowspan="2"|9 | |rowspan="2"|9 | ||
− | |JP1 | + | |JP1 thru JP3: leave empty |
− | | | + | |Optional Buffer Bypass |
|rowspan="2"|Zero ohm jumpers | |rowspan="2"|Zero ohm jumpers | ||
|rowspan="2"|Digikey | |rowspan="2"|Digikey | ||
|rowspan="2"|0.0QTR-ND | |rowspan="2"|0.0QTR-ND | ||
− | |rowspan="2"| | + | |rowspan="2"|5 |
|---- | |---- | ||
|JP4, JP5 | |JP4, JP5 | ||
Line 88: | Line 88: | ||
|---- | |---- | ||
|10 | |10 | ||
− | |Q1 | + | |Q1 thru Q8 |
− | | | + | |Digital Control Transistors |
− | |2N3904, 40V | + | |2N3904, NPN Transistor, 40V, TO-92 |
|Digikey | |Digikey | ||
|2N3904-APCT-ND | |2N3904-APCT-ND | ||
Line 97: | Line 97: | ||
|11 | |11 | ||
|U1 thru U8 | |U1 thru U8 | ||
− | |Adjustable Linear Regulator | + | |Current Regulators |
− | + | |LM317L, Adjustable Linear Regulator, 0.1A, TO-92 | |
|Digikey | |Digikey | ||
|LM317LZ-ND | |LM317LZ-ND | ||
Line 105: | Line 105: | ||
|12 | |12 | ||
|U11 | |U11 | ||
− | | | + | |Linear Regulator |
− | |TL750L05, | + | |TL750L05, 5V, 150mA, TO-92 |
|Digikey | |Digikey | ||
|296-8002-5-ND | |296-8002-5-ND | ||
Line 113: | Line 113: | ||
|13 | |13 | ||
|C2 | |C2 | ||
− | |Bypass Capacitor | + | |Bypass Capacitor |
− | |Ceramic Capacitor | + | |10uF Ceramic Capacitor |
|Digikey | |Digikey | ||
|445-4816-ND | |445-4816-ND | ||
Line 121: | Line 121: | ||
|14 | |14 | ||
|C1, C3, C4 | |C1, C3, C4 | ||
− | |Bypass Capacitors | + | |Bypass Capacitors |
− | + | |0.1uF Ceramic Capacitor | |
|Digikey | |Digikey | ||
|BC1148TR-ND | |BC1148TR-ND | ||
Line 129: | Line 129: | ||
|15 | |15 | ||
|LED1 | |LED1 | ||
− | | | + | |Power LED |
− | |3mm | + | |3mm Yellow LED |
|Digikey | |Digikey | ||
|754-1212-ND | |754-1212-ND | ||
Line 138: | Line 138: | ||
|J2, J3 | |J2, J3 | ||
|Screw Terminal | |Screw Terminal | ||
− | |2 position euro-style | + | |2 position euro-style screw terminal |
|DigiKey | |DigiKey | ||
|ED2635-ND | |ED2635-ND | ||
Line 145: | Line 145: | ||
|17 | |17 | ||
|J5, J6 | |J5, J6 | ||
− | | | + | |SPI Headers |
− | |0.1" | + | |6 pin (2x3 DIL) 0.1" Header |
|Digikey | |Digikey | ||
|609-3202-ND | |609-3202-ND | ||
Line 153: | Line 153: | ||
|18 | |18 | ||
|J4 | |J4 | ||
− | |Power Jack | + | |Power Jack |
− | |2. | + | |2.1mm ID Barrel Jack |
|Digikey | |Digikey | ||
|CP-002AH-ND | |CP-002AH-ND | ||
Line 161: | Line 161: | ||
|19 | |19 | ||
|U9 | |U9 | ||
− | |Shift Register | + | |Shift Register |
− | |74HCT595, | + | |74HCT595, 8-bit 16DIP |
|Digikey | |Digikey | ||
|568-1560-5-ND | |568-1560-5-ND | ||
Line 170: | Line 170: | ||
|U10 | |U10 | ||
|Schmitt-input "buffer" IC | |Schmitt-input "buffer" IC | ||
− | |74ACT14, | + | |74ACT14, 16DIP |
|Digikey | |Digikey | ||
|296-4368-5-ND | |296-4368-5-ND | ||
Line 177: | Line 177: | ||
|21 | |21 | ||
|J1 | |J1 | ||
− | |Display Connector | + | |Display Connector |
− | |11 Position/22 Contact 0.156" pitch | + | |11 Position/22 Contact 0.156" pitch board edge connector |
|Digikey | |Digikey | ||
|EBM11DSAN-ND | |EBM11DSAN-ND | ||
Line 185: | Line 185: | ||
|22 | |22 | ||
|N/A | |N/A | ||
− | |Standoffs | + | |Display Top Standoffs |
− | | | + | |Standoff, 7/8" round |
|Digikey | |Digikey | ||
|1848K-ND | |1848K-ND | ||
Line 193: | Line 193: | ||
|23 | |23 | ||
|N/A | |N/A | ||
− | |Display | + | |Display Bottom Standoffs |
− | | | + | |Standoff, round, 3/4" |
|DigiKey | |DigiKey | ||
|3488K-ND | |3488K-ND | ||
Line 201: | Line 201: | ||
|24 | |24 | ||
|N/A | |N/A | ||
− | | | + | |Display Top Standoff Washers |
− | | | + | |1/16" thick Nylon Washers, #6 screw |
− | |McMaster | + | |McMaster |
|90295A090 | |90295A090 | ||
|2 | |2 | ||
Line 209: | Line 209: | ||
|25 | |25 | ||
|N/A | |N/A | ||
− | |Display/Driver Board | + | |Display Bottom/Driver Board Standoffs |
− | | | + | |1/8" tall Nylon standoff |
− | |McMaster | + | |McMaster |
|94639A407 | |94639A407 | ||
|2 | |2 | ||
Line 217: | Line 217: | ||
|26 | |26 | ||
|N/A | |N/A | ||
− | |Mounting Screws | + | |Display Bottom/Driver Board/Mounting Screws |
− | |Button Socket Cap | + | |Screw, Button Socket Cap 6-32 x 1/2" |
|McMaster | |McMaster | ||
|92949A148 | |92949A148 | ||
− | | | + | |6 |
− | |---- | + | |---- |
|27 | |27 | ||
+ | |N/A | ||
+ | |Display Top | ||
+ | |Screw, Button socket Cap 6-32 x 3/8" | ||
+ | |McMaster | ||
+ | |92949A146 | ||
+ | |2 | ||
+ | |---- | ||
+ | |28 | ||
|N/A | |N/A | ||
|Delrin Insulator | |Delrin Insulator | ||
|Delrin Insulator | |Delrin Insulator | ||
− | |Evil Mad | + | |Evil Mad Science LLC |
− | |||
− | |||
− | |||
− | |||
|N/A | |N/A | ||
− | |||
− | |||
− | |||
− | |||
|1 | |1 | ||
|---- | |---- | ||
|} | |} | ||
+ | |||
+ | |||
== Assembly procedure == | == Assembly procedure == | ||
Line 249: | Line 251: | ||
=== 1. The circuit board === | === 1. The circuit board === | ||
− | Here's what the | + | Here's what the bare circuit board looks like: |
http://evilmadscience.s3.amazonaws.com/wiki/bdd/v0.9/assy/bdd_001.jpg | http://evilmadscience.s3.amazonaws.com/wiki/bdd/v0.9/assy/bdd_001.jpg | ||
Line 291: | Line 293: | ||
=== 3. Decimal Point Load Resistors === | === 3. Decimal Point Load Resistors === | ||
− | + | Let's finish off the decimal point resistors. | |
+ | |||
+ | We'll be installing 68 ohm resistors (color code: Blue/Gray/Black/Gold) in locations R1 through R5. | ||
http://evilmadscience.s3.amazonaws.com/wiki/bdd/v0.9/assy/bdd_010.jpg | http://evilmadscience.s3.amazonaws.com/wiki/bdd/v0.9/assy/bdd_010.jpg | ||
Line 318: | Line 322: | ||
Getting the hang of this? Great! | Getting the hang of this? Great! | ||
− | Next, let's install the 16 | + | Next, let's install the 16 ohms (color code: Brown/Blue/Black/Gold) current sense resistors. These come as a segment from a large spool. Just pull them straight out and straighten the leads as needed. |
http://evilmadscience.s3.amazonaws.com/wiki/bdd/v0.9/assy/bdd_016.jpg | http://evilmadscience.s3.amazonaws.com/wiki/bdd/v0.9/assy/bdd_016.jpg | ||
Line 328: | Line 332: | ||
− | === 5. Base | + | === 5. Base resistors === |
Next, locate all the 1k ohm resistors (color code: Brown/Black/Red/Gold). | Next, locate all the 1k ohm resistors (color code: Brown/Black/Red/Gold). | ||
Line 369: | Line 373: | ||
− | === 8. SPI Header Ground | + | === 8. SPI Header Ground Connections === |
− | Next, we will install the jumpers that connect the Big Digit Driver to the SPI ground line. For this we'll use zero ohm wire jumpers, which look like resistors with a single black stripe instead of four or more. (If you should need additional jumpers beyond those included with the kit, you can use plain wire as a substitute.) | + | Next, we will install the jumpers that connect the Big Digit Driver to the SPI ground line. For this we'll use zero-ohm wire jumpers, which look like resistors with a single black stripe instead of four or more. (If you should need additional jumpers beyond those included with the kit, you can use plain wire as a substitute.) |
http://evilmadscience.s3.amazonaws.com/wiki/bdd/v0.9/assy/bdd_030.jpg | http://evilmadscience.s3.amazonaws.com/wiki/bdd/v0.9/assy/bdd_030.jpg | ||
Line 383: | Line 387: | ||
''Please note that locations JP1, JP2, and JP3 are normally left unpopulated.'' | ''Please note that locations JP1, JP2, and JP3 are normally left unpopulated.'' | ||
− | (Aside: Jumpers at JP1-JP3 can be used to bypass the Schmitt-input "buffer" chip. Even though some of our photos do show these installed, please leave JP1-JP3 empty ''unless you really know what you're doing''. If for a good reason you do install jumpers in JP1-JP3, you ''must not'' install the | + | (Aside: Jumpers at JP1-JP3 can be used to bypass the Schmitt-input "buffer" chip. Even though some of our photos do show these installed, please leave JP1-JP3 empty ''unless you really know what you're doing''. If for a good reason you do install jumpers in JP1-JP3, you ''must not'' install the IC in location U10, and instead leave that socket empty.) |
− | === 9. Shift Register and Schmitt | + | === 9. Shift Register and Schmitt Trigger Sockets === |
Next, we will install the sockets for the ICs. | Next, we will install the sockets for the ICs. | ||
Line 422: | Line 426: | ||
http://evilmadscience.s3.amazonaws.com/wiki/bdd/v0.9/assy/bdd_034.jpg | http://evilmadscience.s3.amazonaws.com/wiki/bdd/v0.9/assy/bdd_034.jpg | ||
− | We will be installing these into locations Q1, Q2, Q3, Q4, Q5, Q6, Q7, and Q8 (in a line across the middle of the board). Note that orientation matters! Take a | + | We will be installing these into locations Q1, Q2, Q3, Q4, Q5, Q6, Q7, and Q8 (in a line across the middle of the board). Note that orientation matters! Take a peek at the board. See how the footprint is a circle with a flat side? That flat side matches up with the flat side on the part itself (the side with the text on it) - in other words, the flat side of the part should be facing toward the top of the board. |
http://evilmadscience.s3.amazonaws.com/wiki/bdd/v0.9/assy/bdd_035.jpg | http://evilmadscience.s3.amazonaws.com/wiki/bdd/v0.9/assy/bdd_035.jpg | ||
Line 519: | Line 523: | ||
− | === 17. SPI | + | === 17. SPI headers === |
These are also a bit tricky. The SPI header is a two by three block of straight pins. These should drop right into locations J5 and J6, on the left-hand and right-hand side of the board. Solder one pin on the back and then flip the board over. Make sure that the header is perpendicular to the board and the black plastic block is seated on the board. Once you're sure the header is seated properly, solder the rest of the pins on the back. | These are also a bit tricky. The SPI header is a two by three block of straight pins. These should drop right into locations J5 and J6, on the left-hand and right-hand side of the board. Solder one pin on the back and then flip the board over. Make sure that the header is perpendicular to the board and the black plastic block is seated on the board. Once you're sure the header is seated properly, solder the rest of the pins on the back. | ||
Line 620: | Line 624: | ||
=== 26. Board Spacers And Standoffs - Top of Display === | === 26. Board Spacers And Standoffs - Top of Display === | ||
− | To match the height of the stack-up on the bottom of the display, use the 1/16 inch (1.6mm) thick nylon washer, 7/8 inch (22.2mm) tall threaded standoff, and | + | To match the height of the stack-up on the bottom of the display, use the 1/16 inch (1.6mm) thick nylon washer, 7/8 inch (22.2mm) tall threaded standoff, and 3/8 inch (9.5mm) long 6-32 threaded screw. On the top corners, pass a screw through the display board and washer. Screw a standoff onto it. |
http://evilmadscience.s3.amazonaws.com/wiki/bdd/v0.9/assy/bdd_088.jpg | http://evilmadscience.s3.amazonaws.com/wiki/bdd/v0.9/assy/bdd_088.jpg |