I bought some cheap 3 volt laser line generator modules. My supplier was out of 5 volt units. I want to run them off a 5 volt USB power bank.
The laser module draws 20mA at 3 volts. It seems lile just adding an LED in series drops about 2.2 volts, and if the laser module is happy with sligbtly less than 3 volts, I'll have a pretty simple solution.
The reason for the laser line generator is interesting. When I was at pbysical therapy post knee replacement, I overheard my therapist talking to a gentlemen with Parkinsons Disease who was freezing in his gait. He'd take a step, then be unable to take the next step.
I had heard years ago that projecting a laser line to give people suffering like a target for the next step worked well. I asked my therapist of this technique was still used. Yes, he said, and they wanted to try it, but with the cost of laser being over $200, they hadn't tried it yet.
Crazy. i had just purchased a "good" line generator for 5 bucks. I quickly whipped something together for my next appointment. The feedback was my collection of parts really improved this guy's walking. Thst felt pretty good amd I made a second module to help another gentlrman.
The laser module draws 20mA at 3 volts. It seems lile just adding an LED in series drops about 2.2 volts, and if the laser module is happy with sligbtly less than 3 volts, I'll have a pretty simple solution.
The reason for the laser line generator is interesting. When I was at pbysical therapy post knee replacement, I overheard my therapist talking to a gentlemen with Parkinsons Disease who was freezing in his gait. He'd take a step, then be unable to take the next step.
I had heard years ago that projecting a laser line to give people suffering like a target for the next step worked well. I asked my therapist of this technique was still used. Yes, he said, and they wanted to try it, but with the cost of laser being over $200, they hadn't tried it yet.
Crazy. i had just purchased a "good" line generator for 5 bucks. I quickly whipped something together for my next appointment. The feedback was my collection of parts really improved this guy's walking. Thst felt pretty good amd I made a second module to help another gentlrman.