shutter_speed_tester

## Part list
| Name | Description | Aprox. Price | Reference |
| ----- | -------------| ---------- | ------ |
| Main board | The board designed for shutter speed tester purpose | 12.73 € / 3 pcs | https://aisler.net/p/NGWECDGA |
| High power Led | A 8000 mcd red led | 0.62 € | 1050453 - LED 5 mm L-7113SEC-J3</br>https://www.conrad.fr/p/kingbright-l-7113sec-j3-led-rouge-rond-5-mm-8000-mcd-20-20-ma-22-v-1050453 |
| Green LED | | 0.17 € | 180180 - LED 5 MM SUPER LUMIN TYPE L-7113CGDK</br>https://www.conrad.fr/p/kingbright-l-7113cgdk-led-vert-rond-5-mm-140-mcd-30-20-ma-21-v-180180|
| Push button | | 0.23 €| 705338 - INTERRUPTEUR LOW COST JTP-1230L</br>https://www.conrad.fr/p/te-connectivity-1825910-2-bouton-poussoir-a-pression-24-vdc-005-a-1-x-offon-a-rappel-1-pcs-701749 |
| Toggle switch | Used as power switch | 1.53 € | 1587528 - Inter à bascule TC-R13-70A-01</br>https://www.conrad.fr/p/interrupteur-a-bascule-tru-components-tc-r13-70a-01-1587528-24-vdc-10-a-1-x-offon-a-accrochage-1-pcs-1587528 | 
| JST XH connector or </br> molex 6410 / KF2510 connector |  molex 6410 are finally used  |   | Standard component  |
| Arduino nano | | 13 € | https://www.conrad.fr/p/tru-components-carte-de-developpement-atmega328-nano-development-board-2134126 |
| 15 pins 2.54mm female pcb header| These headers are used to plug the Arduino Nano on the pcb|| Standard component|
| Resistors :</br>220 Ohm</br>1k Ohm (x2)</br>10k Ohm</br>220k Ohm | Carbon film, 1/4 W THT | 0.08 € x5 | https://www.conrad.fr/p/resistance-a-couche-carbone-yageo-cfr25j220rh-220-sortie-axiale-0207-025-w-1-pcs-1417693</br>https://www.conrad.fr/p/resistance-a-couche-carbone-yageo-cfr25j1k0h-1-k%CF%89-sortie-axiale-0207-0.25-w-1-pc-s-1417699</br>https://www.conrad.fr/p/resistance-a-couche-carbone-yageo-cfr25j10kh-10-k%CF%89-sortie-axiale-0207-0.25-w-1-pc-s-1417697</br>https://www.conrad.fr/p/resistance-a-couche-carbone-yageo-cfr25j220kh-220-k-sortie-axiale-0207-025-w-1-pcs-1417665 |
| LCD 1602 | | 9.49 € | https://www.conrad.fr/p/display-elektronik-ecran-lcd-16-x-2-pixel-l-x-h-x-p-80-x-36-x-66-mm-2238810|
| I2C Interface for LCD || 4.50 € | https://www.conrad.fr/p/iduino-me033-1-pcs-2315239 |
| Phototransistor | | 0.46 €| Vishay, Visible light, TEPT4400</br>https://fr.rs-online.com/web/p/phototransistors/7000776 |
| Transistor 2N2222| NPN Transistor | 0.10 € | 1265001 - Transistor bipolaire PN2222ATA</br>https://www.conrad.fr/p/on-semiconductor-transistor-bjt-discret-pn2222ata-to-92-3-1-npn-1265001|
| Wire || 0.54 €| 457844 - Câble audio NF1106005</br>https://www.conrad.fr/p/bkl-electronic-1106005-cable-audio-1-x-010-mm-noir-marchandise-vendue-au-metre-457844|
| 9V battery connector | | 0.55 € | https://www.conrad.fr/p/connecteur-clip-pression-1x-6lr61-9-v-beltrona-9v-t-clip-raccordement-par-empreinte-pile-9v-l-x-l-x-h-26-x-13-x-8-mm-490660 |
| Small screw ||2.90 € / 200 pcs | https://www.visserie-boulonnerie-en-ligne.fr/visserie/vis-a-tole-tete-cylindrique-din-7981-pozidrive/vttc020200605i2-po-vis-a-tole-tete-cylindrique-empreinte-pozidrive-din-7981-m-2-2-x-6-5-inox-a2-.html |
| Longer screw || 2.90 € / 200 pcs | https://www.visserie-boulonnerie-en-ligne.fr/visserie/vis-a-tole-tete-cylindrique-din-7981-pozidrive/vttc0209013i2-po-vis-a-tole-tete-cylindrique-empreinte-pozidrive-din-7981-m-2-9-x-13-inox-a2-.html |
| PLA filament for 3D printing | The 3D printing of the case needs about 130g of PLA filament  |  5.08 € (0.13kg x 39.08€/kg) | https://fr.rs-online.com/web/p/materiaux-pour-impression-3d/8320273</br>https://fr.rs-online.com/web/p/materiaux-pour-impression-3d/8320270|