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# electroscope (through-hole edition)
This is a similar board to the [surface mount electroscope](https://github.com/davidk/electroscope) but is easier (or harder, depending on your manufacturing viewpoint) to assemble and source parts for.
<a href="https://oshpark.com/shared_projects/JK9TLh1I"><img src="https://oshpark.com/packs/media/images/badge-5f4e3bf4bf68f72ff88bd92e0089e9cf.png" alt="Order from OSH Park"></img></a>
### 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](https://www.digikey.com/products/en?keywords=2N3906D26ZCT-ND) | Left (label: PNP) |
| 3 | 2N3904 | [2N3904FS-ND](https://www.digikey.com/products/en?keywords=2N3904FS-ND) | Right (label: NPN) |
| 2 | 100 ohm resistor | [100QBK-ND](https://www.digikey.com/product-detail/en/CFR-25JB-52-100R/100QBK-ND/246) | Bottom (label: 100 ohm) |
| 2 | 100k ohm resistor | [100KQBK-ND](https://www.digikey.com/products/en?keywords=100kQBK-ND) | Middle (label: 100k ohm) |
| 2 | 1M ohm resistor | [1.0MQBK-ND](https://www.digikey.com/product-detail/en/yageo/CFR-25JB-52-1M/1.0MQBK-ND/99) | Top (label: 1M ohm) |
### Battery connector
| Quantity | Description | Digikey Part Number | Board Placement |
| -------- | ----------- | ----------- | --------------- |
| 1 | 9v through-hole battery snap - long | [36-968-ND](https://www.digikey.com/product-detail/en/keystone-electronics/968/36-968-ND/151577) | 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](https://www.digikey.com/product-detail/en/keystone-electronics/967/36-967-ND/2745660) | 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](http://www.digikey.com/product-search/en?vendor=0&keywords=160-1704-ND) / Green: [160-1958-ND](http://www.digikey.com/product-search/en?vendor=0&keywords=160-1958-ND) | Bottom (verify orientation before soldering!) |
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