Spoomples
Member
- Joined
- Dec 8, 2018
- Messages
- 54
- Points
- 18
I just barely got a 58-GHS-305-048 Melles Griot head off of eBay. I might have been a bit too hasty about getting one without its fancy control box, but I'll turn this into an opportunity for a project. I think I can manage it, but a little extra advice is always useful. I might turn this thread into a build log once I start, to give back a bit and provide a reference for others.
Powering the 808nm pump diode: Whats the best way to go about this? I was thinking of making a driver with a bunch of parallel LM338s, making a driver with an opamp and a beefy MOSFET, or buying a cheap constant current buck converter from eBay and filtering the output with a big capacitor and inductor. The main issue with building a driver is getting an appropriate input voltage, and the main issue with a cheap buck driver is the output spikes.
Controlling the internal temperatures: What are the TEC power requirements, and are there specific things to watch out for? I'm planning on using an Arduino to read the thermistors and control the TECs. The temperature tables for this specific head are published, so I don't think that will be too bad. I might place the Arduino sketch up on GitHub for others to use for their purposes.
Connectors: Is it possible to buy or make connectors for these heads? I'd prefer it if I don't have to open it up and cut the internal wiring. I own a 3d printer, so I could make a connector if I could at least buy some properly sized pins. I'd also be willing to buy a cable or trashed PSU with one from a member, should anyone here happen to have one laying around.
Tuning: Best way to go about it? I don't have a proper LPM, so would a basic TEC or photodiode be enough to tune the internal temps? I wouldn't get a true power rating, but I could tell how it performs relative to itself.
Misc advice: If there is anything you think is worth mentioning, to either me or anyone reading this in the future, feel free to post it.
Powering the 808nm pump diode: Whats the best way to go about this? I was thinking of making a driver with a bunch of parallel LM338s, making a driver with an opamp and a beefy MOSFET, or buying a cheap constant current buck converter from eBay and filtering the output with a big capacitor and inductor. The main issue with building a driver is getting an appropriate input voltage, and the main issue with a cheap buck driver is the output spikes.
Controlling the internal temperatures: What are the TEC power requirements, and are there specific things to watch out for? I'm planning on using an Arduino to read the thermistors and control the TECs. The temperature tables for this specific head are published, so I don't think that will be too bad. I might place the Arduino sketch up on GitHub for others to use for their purposes.
Connectors: Is it possible to buy or make connectors for these heads? I'd prefer it if I don't have to open it up and cut the internal wiring. I own a 3d printer, so I could make a connector if I could at least buy some properly sized pins. I'd also be willing to buy a cable or trashed PSU with one from a member, should anyone here happen to have one laying around.
Tuning: Best way to go about it? I don't have a proper LPM, so would a basic TEC or photodiode be enough to tune the internal temps? I wouldn't get a true power rating, but I could tell how it performs relative to itself.
Misc advice: If there is anything you think is worth mentioning, to either me or anyone reading this in the future, feel free to post it.