(Project on hold as of 1/5/18)
My name is Mikel Garcia-Marcos and I am an Associate Professor of Biochemistry at the medical campus. I am writing to inquire about a possible project. I would like to recreate something identical or very similar to what is described in the attached manuscript (scroll down to "Support Protocol 1: Construction of programmable LED light device" on page 10 and the related Figure 2 on page 27). Basically, I would like to build an array of LED lights that fits the dimensions of a small plate used for culturing cells and that can be controlled in terms of intensity and duration of "on" and "off" cycles.
Parts cost / sourcing
Qty | Item | Price Ea | Total | Link |
---|---|---|---|---|
1 | Arduino Uno | $22.00 | $22.00 | |
1 | SainSmart LCD / keypad shield | $11.00 | $11.00 | link |
1 | BuckBlock Luxdrive LED driver | $18.00 | $18.00 | link |
12 | 470nm LED module | $6.00 | $72.00 | link |
1 | Power supply 15V 1.5A | $18.00 | $18.00 | link e.g. |
3 | TIP120 darlington | $0.85 | $2.50 | link e.g. |
1 | Other misc parts | $10.00 | $10.00 | |
1 | Custom PC board | $100.00 | $100.00 | ExpressPCB Miniboard (lot of 3) |
Total (est) | $250.00 |
Reference
- Heatsinks: https://www.luxeonstar.com/130mm-x-70mm-1.5-degree-cw-alpha-heat-sink
- Thermalloy: https://www.digikey.com/product-detail/en/aavid-thermalloy/645002F00000G/HS509-ND/6558793
- Trays: https://mx.vwr.com/assetsvc/asset/es_MX/id/7830342/contents
The original Arduino software uses analogWrite() to set the intensity. This is implemented using PWM on the Arduino at 490 or 980 Hz depending on the pins. 6 pins are available so 6 LED groups can be controlled independently (with modifications to the software which currently supports only 3 channels)
A mystery is that in the original design one LED controller is apparently shared by 3 groups of 12 LEDs. Perhaps only one group is ever on at once? Need to discuss with the customer.
Last modified 5 years ago
Last modified on Jan 10, 2018, 11:17:35 AM