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# Analog Driver Board
A simple photoreactor driver board providing control over light intensity. This control is achieved through adjustment of the board-mounted potentiometer. No software is required, and multiple WPP reactors fitted with this board can be connected in series to a single power source. However, fan speed isn’t adjustable and is maintained at maximum.
Relative light intensity can be determined using the analog driver board test points and a multimeter. See operation instructions for more information.
The analog driver board is the recommended driver solution for a typical user.
## PCB
This PCB was designed using KiCAD version 5.
Refer to `driver.pdf` for schematic.
PCB images generated with [tracespace](https://github.com/tracespace/tracespace) follow.
<img src="./driver-.top.svg" width="100%"/>
<img src="./driver-.bottom.svg" width="100%"/>
## Bill of Materials
| reference | value | manufacturer | part number | price | vendors |
| :------------- | :------------ | :----------- | :---------------- | :---- | :------ |
| C2 | 10u | Yageo | CC1206KKX7R8BB106 | $0.25 | [DigiKey](https://www.digikey.com/en/products/detail/yageo/CC1206KKX7R8BB106/5195365?s=N4IgTCBcDaIMJwIxgAwDYDSGAaB2ASgBwBCxi6IAugL5A) [Mouser](https://www.mouser.com/ProductDetail/Yageo/CC1206KKX7R8BB106/?qs=%2Fha2pyFadujG%252BB25mNGWlTAfaj3wXYmzjlPMfFLRNq4azOfH13S4tw%3D%3D) |
| D1 | (red) | Lite-On | LTST-C230KRKT | $0.25 | [DigiKey](https://www.digikey.com/en/products/detail/lite-on-inc/LTST-C230KRKT/386857?s=N4IgTCBcDaIDIBUDKCC0BhMBmADAaQCU8EQBdAXyA) [Mouser](https://www.mouser.com/ProductDetail/Lite-On/LTST-C230KRKT/?qs=%2Fha2pyFadujtt9TjjkxDnLsTSvKz5QHldTfy80PY7mPtEP7ka44l7w%3D%3D) |
| J3, J4 | Barrel Jack | CUI | PJ-002A | $1.50 | [DigiKey](https://www.digikey.com/en/products/detail/cui-devices/PJ-002A/96962) [Mouser](https://www.mouser.com/ProductDetail/CUI-Devices/PJ-002A/?qs=WyjlAZoYn51CKfAix9Mngw%3D%3D) |
| J5 | fan connector | Sullins | PREC040SAAN-RC | $0.50 | [DigiKey](https://www.digikey.com/en/products/detail/sullins-connector-solutions/PREC040SAAN-RC/2774814) |
| J7 | LED connector | Molex | 0901471102 | $0.75 | [DigiKey](https://www.digikey.com/en/products/detail/molex/0901471102/3303846) |
| R1 | 6.8k | Yageo | RC1206FR-076K8L | $0.10 | [DigiKey](https://www.digikey.com/en/products/detail/yageo/RC1206FR-076K8L/729028) |
| R2 | 100 | Yageo | RC1206FR-07100RL | $0.10 | [DigiKey](https://www.digikey.com/en/products/detail/yageo/RC1206FR-07100RL/728491?s=N4IgTCBcDaIAQCUDCBGMAGAbAMQQWnQHYV10EAZEAXQF8g) |
| R5 | 1k | Yageo | RC1206FR-071KL | $0.10 | [DigiKey](https://www.digikey.com/en/products/detail/yageo/RC1206FR-071KL/728387?s=N4IgTCBcDaIEoGECMYAMA2AYnAtKg7EgNIAyIAugL5A) |
| RV1 | 2.2k | Bourns | 3362P-1-202TLF | $3.00 | [DigiKey](https://www.digikey.com/en/products/detail/bourns-inc/3362P-1-202TLF/1232538?s=N4IgTCBcDaIMxwGxgAoFoCMawAYwBUAZAMRAF0BfIA) [Newark](https://www.newark.com/bourns/3362p-1-202tlf/trimmer-potentiometer-2kohm-10/dp/33M2835) |
| TP1 | (yellow) | Keystone | 5014 | $0.50 | [DigiKey](https://www.digikey.com/en/products/detail/keystone-electronics/5014/255336) |
| TP2 | (red) | Keystone | 5010 | $0.50 | [DigiKey](https://www.digikey.com/en/products/detail/keystone-electronics/5010/255332) |
| TP3 | (black) | Keystone | 5011 | $0.50 | [DigiKey](https://www.digikey.com/en/products/detail/keystone-electronics/5011/255333) | |
| U2 | LED driver | Mean Well | LDD-1000L (pin) | $6.00 | [DigiKey](https://www.digikey.com/en/products/detail/mean-well-usa-inc/LDD-1000L/7704722) [Allied](https://www.alliedelec.com/product/mean-well/ldd-1000l/70345765/) [Mouser](https://www.mouser.com/ProductDetail/MEAN-WELL/LDD-1000L?qs=JK6Bpmia%2FmvDNI%252Ba1vDDrA%3D%3D) [Newark](https://www.newark.com/mean-well/ldd-1000l/dc-dc-converter-analog-pwm-30w/dp/14AJ2201) [LEDSupply](https://www.ledsupply.com/led-drivers/mean-well-ldd-l-series-cc-step-down-mode)|
All prices are extended estimates in USD.
In general, these are overestimates, so this should be an upper-estimate on cost.
Many of these components can be substituted, so take the above as suggestions.
Boards themselves can be printed for approximately $5 each.
## Changelog
### Unprinted
### Changed
- Removed wisconsin crest logo
### Revision B
#### Fixed
- Fixedsign of LED terminals on silkscreen
- Voltage divider adjusted: R1 to 6.8k R2 to 100 ohm
- Adjusted voltage divider silkscreen
### Revision A
#### Added
- Initial design
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