DRO-550 Bill of Materials
The DRO-550 board comes with all surface mount components already installed. However, there are additional parts that you will need to complete your DRO-550. First, you will need a set of through-hole components to finish the board assembly. The table below lists these components and gives you some information on deciding which you will need. The main decisions are the LED colors and how many scale, edge, and tach inputs you want.
To order parts, go to Mouser and enter each part number and quantity in the EZ buy tool
. If you create an account with Mouser, then it is faster to use the BOM Import Tool 
to copy and paste the text below for the through-hole components. Copy and paste the text below into the text region below the "Import BOM" button and then press the button.
BOM Import Text (Copy and Paste)
|
101-0210-EV|23 571-6404562|2 571-6404563|5 571-6404564|5 649-67997-104HLF|5 665-AT-1438TWTR|1 538-15-38-1024|5 630-HDSP-521E|9 859-LTL-1CHE|5 101-0364-EV|1 |
Through-hole Components |
||||
| Description | Vendor | Part # | Quantity | Note |
| Round switch cap, black, 12mm | Mouser | 101-0210-EV | 23 | For tact switches on DRO-550 board |
| MTA-100 2 pin header | Mouser | 571-6404562 | 2 | DC power input, 5V output |
| MTA-100 3 pin header | Mouser | 571-6404563 | 5 | Two edge finder, two tachs, one RS-232 |
| MTA-100 4 pin header | Mouser | 571-6404564 | 5 | One per scale input |
| 2x2 pin .100 header | Mouser | 649-67997-104HLF | 5 | One per scale input |
| Piezo buzzer, 4kHz, 5V, 14mm | Mouser | 665-AT-1438TWTR | 1 | Optional if you want a zero/key beep |
| Shunt jumper, 2 position | Mouser | 538-15-38-1024 | 5 | One per scale input |
| LED 7-segment, RED, dual digit | Mouser | 630-HDSP-521E | 9 | For GREEN: 630-HDSP-521G |
| LED diffused, RED, 3mm | Mouser | 859-LTL-1CHE | 5 | For GREEN: 859-LTL-1CHG |
| Tact switch, 6mm, 7mm plunger | Mouser | 101-0364-EV | 1 | For emergency firmware update |
You will also need to make an enclosure for your DRO-550. The following table lists the parts you will need. Detailed instructions are given in the DRO-550 construction section. You can use the same EZ Buy or BOM Import tools from Mouser to order these parts.
BOM Import Text (Copy and Paste)
|
546-1599H-BK|1 161-2104|5 163-1060-EX|1 161-7300-EX|3 534-8417|6 156-1309|1 571-3-640442-2|1 571-3-640442-3|4 571-3-640442-4|5 418-TR1509|1 |
Enclosure Parts |
||||
| Description | Vendor | Part # | Quantity | Note |
| Black Enclosure 1599HBK | Mouser | 546-1599H-BK | 1 | |
| Panel Mount 4 pin Mini-DIN Connector | Mouser | 161-2104 | 5 | One per Chinese scale input. Not needed for quadrature or iGaging scales. |
| Snap-in DC Power Jack, 2.1mm | Mouser | 163-1060-EX | 1 | |
| Stereo 3.5mm Jack | Mouser | 161-7300-EX | 3 | One edge finder, two tachs |
| 0.875" 6-32 M/F Alum Hex Standoff | Mouser | 534-8417 | 6 | |
| 9 pin D-Sub Receptacle | Mouser | 156-1309 | 1 | Optional if using RS-232 |
| MTA-100 2 pin receptacle | Mouser | 571-3-640442-2 | 1 | DC power input |
| MTA-100 3 pin receptacle | Mouser | 571-3-640442-3 | 4 | One edge finder, two tachs, one RS-232 |
| MTA-100 4 pin receptacle | Mouser | 571-3-640442-4 | 5 | One per scale input |
| AC adapter, 9V, 1.4A, 2.1mm, 90-264VAC | Mouser | 418-TR1509 | 1 |
Enough for 5V @ 2A on DRO For 5V @ 3A: 709-GS18U09-P1J |
| 4-40 x 1/2" black machine screws | 12 | Two per scale input, two per RS-232 | ||
| 4-40 hex nut | 2 | Two per RS-232 | ||
| 6-32 x 3/8" machine screw | 6 | For attaching PCB to standoffs | ||
| 24-26 AWG stranded wire | 5' | For making the edge, tach, and power cables | ||
| Silk-screened Lexan overlay | ShumaTech | 99-0014 | 1 | |