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electroscope (through-hole edition)
This is a similar board to the surface mount electroscope but is easier (or harder, depending on your manufacturing viewpoint) to assemble and source parts for.
Bill of Materials
This BOM specifies the amount needed for one board. Parts have been translated from their surface mount equivalents.
| Quantity | Description | Digikey Part Number | Board Placement |
|---|---|---|---|
| 3 | 2N3906 | 2N3906D26ZCT-ND | Left (label: PNP) |
| 3 | 2N3904 | 2N3904FS-ND | Right (label: NPN) |
| 2 | 100 ohm resistor | 100QBK-ND | Bottom (label: 100 ohm) |
| 2 | 100k ohm resistor | 100KQBK-ND | Middle (label: 100k ohm) |
| 2 | 1M ohm resistor | 1.0MQBK-ND | Top (label: 1M ohm) |
Battery connector
| Quantity | Description | Digikey Part Number | Board Placement |
|---|---|---|---|
| 1 | 9v through-hole battery snap - long | 36-968-ND | 9V terminals (verify before soldering by attaching to a 9V battery -- reworking afterwards is difficult without specialized tools/materials) |
or
| Quantity | Description | Digikey Part Number | Board Placement |
|---|---|---|---|
| 1 | 9v through-hole battery snap - short | 36-967-ND | 9V terminals (verify before soldering by attaching to a 9V battery -- reworking afterwards is difficult without specialized tools/materials) |
LEDs
| Quantity | Description | Digikey Part Number | Board Placement |
|---|---|---|---|
| 2 | 3mm LEDs | (Red: 160-1704-ND / Green: 160-1958-ND | Bottom (verify orientation before soldering!) |