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Today, 07:38

VDX replied to a thread Feeler: Diode mount in Buy/Sell/Trade

... I'm using "standard" aluminium oder brass mounts in a bigger aluminium block for better handling the excess heat: Viktor

3 replies | 554 view(s)

Today, 06:24

buffo replied to a thread New member to the forum in Laser Meet-N-Greet

+1 to everything Brian said. :) We've got several members here on the forum from the UK, and they're a right decent bunch! I urge you to pay close attention to any new threads here in this "meet and greet" sub-forum talking about "UKLEM". This is an event that you will definitely want to...

2 replies | 194 view(s)

Today, 06:19

KrisVermeulen replied to a thread Feeler: Diode mount in Buy/Sell/Trade

Looks nice. Did you make them?

3 replies | 554 view(s)

Today, 04:07

Tagan55 replied to a thread SELLING : Kvant ClubMAX 3000 FB4 in Buy/Sell/Trade

Is this still for sale?

1 replies | 250 view(s)

Today, 03:41

laserist replied to a thread CYGN-A in The Lounge

Since only one gate is on at a time. Three summing amps, red, green, & blue. Resistors between gates and appropriate summing amp. Gate. Amp. Red. Red. Yel. Red & Yel Grn. Grn. Blu. Blu. This editor...

101 replies | 6018 view(s)

Yesterday, 22:57

KrisVermeulen replied to a thread Scanner problem 6800HP in Laser Displays, Shows, and Scanning

Thank you Steve. What could be the cause of this 'overload'? Bad Galvo's... (Both of them? - They are very old) Bad power supplies or bad connection? I find it strange that there is an overload possible when there is no motion asked (Static beam)

2 replies | 93 view(s)

Yesterday, 20:53

Greg replied to a thread CYGN-A in The Lounge

For the next part, boolean RYGB to RGB, each output (buffer needed?) generates RGB levels for each of the 4 colors using voltage dividers, 2 input summing amp each for red and green?

101 replies | 6018 view(s)

Yesterday, 19:24

carlos3621 replied to a thread SELLING : Selling Fiber beam RGB3-RGB100Watt ,GREEN 1WATT - Green 50watt laser moudation in Buy/Sell/Trade

Specs are 1.1Mrad for all modules on their 30 watt FC projectors, could this be accurate??

2 replies | 357 view(s)

Yesterday, 12:33

mixedgas replied to a thread Scanner problem 6800HP in Laser Displays, Shows, and Scanning

That is the symptom of a badly over-loaded power supply going into current limit and shutting down. Steve

2 replies | 93 view(s)

Yesterday, 12:05

laserist replied to a thread CYGN-A in The Lounge

Just connect a 30K resistor between the output of the comparator and the 10K pull up resistor. The 30K resistor will act with the 10K as a voltage divider and give you a virtual ground when the comparator is low.

101 replies | 6018 view(s)

Yesterday, 11:38

Greg replied to a thread CYGN-A in The Lounge

Maybe I could do something with a germanium diode to limit negative excursion and a 5.1V Zener for the other limit.

101 replies | 6018 view(s)

Yesterday, 10:18

KrisVermeulen started a thread Scanner problem 6800HP in Laser Displays, Shows, and Scanning

Hello, I have a problem with a setup of 2 6800HP galvo's with Medialas microamps. In the video i drive the galvo's with a static targeted beam but both the galvo's react abnormal. Does anyone have a clue what might be the problem? Thank you for helping me out. https://youtu.be/YYPW_cXKgBE ...

2 replies | 93 view(s)

Yesterday, 09:25

Greg replied to a thread CYGN-A in The Lounge

Not a good solution, but the resistor network shown in the graphic is triggering the inverter. Unfortunately I only have 4 opto-isolators, and nothing much else I need to order at present, but that should be enough to see it working soon.

101 replies | 6018 view(s)

Yesterday, 07:39

laserist replied to a thread CYGN-A in The Lounge

I think a opto-isolator per comparator would salvage the bipolar design.

101 replies | 6018 view(s)

Yesterday, 07:31

laserist replied to a thread CYGN-A in The Lounge

Sorry I'm stupid. We'll have to run the comparators +15 and ground, or do something clever that I haven't thought of yet. Common cathode doesn't accomplish what I wanted when the "cathode" is at -15V Oh well, we needed to be able to offset the input signal in any case.

101 replies | 6018 view(s)

04-21-2021, 11:32

laserist replied to a thread CYGN-A in The Lounge

Sorry, you want to run the comparators at +/-15 volts, and pull their outputs up to +5 volts to match your 5V 74LS logic down stream. What we're going for is a whole lot of headroom on the analog input. +/- 2 volts will cover the RYGB output giving RYGBBGYR with no black at all. When you turn the...

101 replies | 6018 view(s)

04-21-2021, 10:08

james replied to a thread The LaserBoy Thread in Programming and other assorted Bit-level Alchemy

There are some other features in the new development version that are worth mentioning. If you go into the u menu for user interface visual attributes, you can now turn vector rendering on or off. This is the line between two consecutive vertices. With it off all you see are the vertices...

482 replies | 103769 view(s)

04-21-2021, 08:58

Greg replied to a thread CYGN-A in The Lounge

I do have 74LS04 hex inverters and LM339 comparators. I'm afraid I'm still a bit confused though. The configuration in the graphic doesn't seem right, with the negative voltages on the inputs of the comparators. Not sure I've understood correctly.

101 replies | 6018 view(s)

04-21-2021, 07:38

james replied to a thread The LaserBoy Thread in Programming and other assorted Bit-level Alchemy

#math phase_cycle 360.0 #math interval_cycle 1.0 #math start 0.0 #math duration 1.0 math iterations 1000 # x = sin(t * 3) + sin(t * 5) # y = cos(t * 3) + cos(t * 5) # for t = 0 to two_pi

482 replies | 103769 view(s)

04-21-2021, 07:21

lasermaster1977 replied to a thread The LaserBoy Thread in Programming and other assorted Bit-level Alchemy

my bad, for being in a hurry. I meant x=sin(3x) + sin(5x), y=cos(3x) + cos(5x) for x = 0 to 360

482 replies | 103769 view(s)

04-21-2021, 07:00

james replied to a thread The LaserBoy Thread in Programming and other assorted Bit-level Alchemy

If you generate a frame_set and you want to save it for use later in the script you can store it in an invisible list of frame_sets and recall it later. There are only 2 registers A and B to do math on, but you can store as many frame_sets as your RAM will support. In Win32 your heap is...

482 replies | 103769 view(s)

04-21-2021, 06:50

james replied to a thread The LaserBoy Thread in Programming and other assorted Bit-level Alchemy

Cool! Thanks! I'll fix that in my cheat-sheet.

482 replies | 103769 view(s)

04-21-2021, 06:19

james replied to a thread The LaserBoy Thread in Programming and other assorted Bit-level Alchemy

In your example, 3 and 5 are the amplitude. 0 and 90 are phase. It's worth noting that since this all gets scaled to fit inside of short integer space, the actual size of a figure is more or less irrelevant except when compared to other figures in the same space. Offset is also typically...

482 replies | 103769 view(s)

04-21-2021, 05:47

james replied to a thread The LaserBoy Thread in Programming and other assorted Bit-level Alchemy

If you add two forms that are essentially the same thing that's the same as multiplying one form by 2. It just gets twice as big. If you want to add two frame_sets vertex-to-vertex you make sure they are both in the registers (generate one then generate the other) and call math add This...

482 replies | 103769 view(s)

04-21-2021, 04:05

laserist replied to a thread CYGN-A in The Lounge

The LM339 comparators have open collector outputs. You choose a pull up resistor appropriate to the logic family you use. I'm sorry, the inverters I mentioned, sometimes called NOT gates. Example 74LS04 hex inverter.

101 replies | 6018 view(s)

04-21-2021, 02:56

Greg replied to a thread CYGN-A in The Lounge

What a great idea. The graphic shows what I think has been described, but a recommended approach to the NOR gates would be helpful. I have HD74LS02 NOR gates which operate 0 to +5V. The square waves from the comparators are +-15V. Should I: 1) use voltage dividers and summing amps to scale and...

101 replies | 6018 view(s)

04-21-2021, 02:36

Greg replied to a thread The LaserBoy Thread in Programming and other assorted Bit-level Alchemy

Please would you show how to sum two or more circles.

482 replies | 103769 view(s)

04-20-2021, 20:12

dchammonds replied to a thread The LaserBoy Thread in Programming and other assorted Bit-level Alchemy

I finally got around to installing MSYS2 on my laptop- I got tired of running downstairs to use the mainframe and a jump drive every time I needed to compile something...*nyancat In msys2_build_notes.txt I had to change the following line from pacman -S --needed base-devel \ to ...

482 replies | 103769 view(s)

04-20-2021, 18:32

james replied to a thread The LaserBoy Thread in Programming and other assorted Bit-level Alchemy

Thank you! James.

482 replies | 103769 view(s)