Wide price ranges on what looks about the same..
Cheapest was $26--active cooled head and free $hip-- 'claims' to be 5.5W ---5500 mW and both analog and TTL.
well for starters all analog is also TTL.-----*BUT* there is a switch marked 'TTL/analog-'- on several versions..as high as $200
I will meter one asap--(paid today)
another odd thing- in the listing it sez-'used' 'new' and 'brand new'
https://www.ebay.com/i/302773791684...&rk=8&rkt=30&sd=192488753227&itm=302773791684
and focusable.
full description from listing--
Description OF PRODUCTS:
1,Wavelength:445nm~450nm
2,Output Power:5500mW/5.5W (Max)
3,Adjust the focus:Yes(By fingers),<0.5mm;
4,Working Voltage:12V;
5,Power supply:>4A;
6,TTL:Yes (TTL Modulation: Make sure input TTL level PWM dightal signal)
7,TTL signal input 0~5V input.(0V OFF/5V ON)
8,Analog:Yes; (In driver board have one TTL/Analog Change-over switch)
9, Frequency for TTL control:0-20KHz;
10,Duty cycle:input 1%-100%;
11,Cooling mode:Heatsink and Fan
12,Material:Metal
13,Lens:Glass
14,White cable at "+",Yellow cable at "-";(driver board had showing words for "+" and "-")
15,Size:Laser Module:90*40*40mm;Driver board:72*35*28mm;
16,Package:1 X 450nm 5500mW laser module with Analog/TTL Driver board
Features:
* It can adjust the focus(By Fingers),smallest dot <0.5mm;
*Can carving wood (so easy);
*Can be use for CNC;
*It can burn plastic,paper,balloons,cigarettes,wood and so on;
*Pointer distance >5000M;
*Can work continuousely >12
''''
not 100% sure what
10,Duty cycle:input 1%-100%;
^^that means.
ALSO a .5mm spot is small for these lasers afaik..
>>>>>>>>>>>>
OOPs
just noticed that this seller has zero feedback--bye-bye $26
