Recent content by HTV

It doesn’t depend from us. Unfortunately, we can’t make it lower.

http://laserpointerforums.com/f67/ncp1529-driver-red-laser-diodes-what-do-you-think-70026.html#post1011659

Not at all. You are one of the few people in LPF that create really interesting things.

Compare schemes and its publishing dates: http://forum.hobbi.tv/showthread.php?p=6203#post6203 and http://laserpointerforums.com/f67/tps63020-based-driver-70311.html.

Our community used this driver from 08/05/2010: http://forum.hobbi.tv/showthread.php?t=290 It is your opinion. We know that it is one of best drivers for red LD. It passed test by time.

It is our own scheme. This driver was created around year ago. By the way, we noticed that someone from LPF use our ideas in his drivers. Because of that, we didn’t publish own new schemes on our forum for free access anymore.

This is written by author our scheme with TPS 63020. His nick is INFERION. He don’t speak English. Hello rfhv, I noticed your scheme, it looks a lot like mine. Your scheme has a difference in current sensor in essence. I tormented this chip long time ago. I think, the cause of ripple is in...

Congratulations! :beer: We couldn’t solve this problem.

Can you publish oscillograms of driver’s work at 0.5A and 1A? It isn’t a useless interest. The same scheme was published around year ago on our site. Our scheme has big pulsations. Difference is in one chip. You used ZXCT1009 instead ina138.

Li-Po has voltage range from 4.2V to 2.8V during a supply. :beer:

It’s simple. There isn't necessary in constant current driver for red LDs. But, there was a necessary in protection of Li-Po.

No, it doesn’t. But, we make measurements of popular LDs and recommends current and voltage for them. For example, we recommend 2.95V for 815 and 2.73V for 826. It means that LDs will work 100 hours in laser pointer. We use current-voltage characteristic for it. By the way, we can. There is a...

Red LDs have rather stable current-voltage characteristic that allow to supply its with voltage. Also, red LDs consume lower current under undercooling. It means that risk of LD’s death becomes lower, because its efficiently and radiated power increase under frost. Though, this is not...

It isn't a problem, if you promise to write review in this thread. Send me your address in PM.

Constant voltage makes driver more efficient and permit increase temperature stability of LDs . But, constant voltage can’t be used for all types LDs. For example, it can’t be used for BR or Blue LDs. We can give 3 Inferno 2.11 for test to 3 different persons from LPF for free. You'll see that...