- #31
neanderthalphysics
- 53
- 6
OK, how would you improve it?
Hacked pulsed laser driver using Arduino
Click For Summary
Discussion Overview
The discussion revolves around the attempt to modify a 5mW laser pointer to be pulsed using an Arduino as a driver. Participants explore various circuit designs, components, and safety considerations related to laser usage.
Discussion Character
- Exploratory
- Technical explanation
- Debate/contested
- Mathematical reasoning
Main Points Raised
- One participant describes their initial setup using an NPN transistor to control the laser but reports it is not functioning as expected.
- Another suggests testing the transistor circuit independently of the Arduino to ensure it works before integrating it.
- Some participants propose using a 555 timer IC instead of a transistor for pulsing the laser, citing potential advantages.
- Concerns are raised about the safety of overdriving the laser, with participants discussing the risks of eye damage from laser exposure.
- There is a discussion about the voltage drop across transistors compared to MOSFETs, with suggestions to try MOSFETs for better performance.
- Participants inquire about the specific wavelength of the laser and the safety rating of the goggles being used.
- One participant mentions the potential for laser pointers to exceed their stated power ratings, raising additional safety concerns.
- Another participant corrects the circuit configuration, emphasizing the correct connections for the laser and batteries in relation to the transistor.
Areas of Agreement / Disagreement
Participants express various opinions on circuit design and safety, with no clear consensus on the best approach to pulsing the laser or the implications of laser safety. Multiple competing views on the use of different components and configurations are present.
Contextual Notes
Some participants note that the voltage from the two AAA batteries may not be sufficient for certain laser types, and there are unresolved questions about the specific characteristics of the laser pointer being used.
Who May Find This Useful
Individuals interested in electronics, laser safety, and circuit design, particularly those looking to integrate Arduino with laser systems.
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