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OK, I will try to give more information but, as I said, I am no expert and I am going by what the literature and from what the controller manufacturer states.
The controller is a Halaser E1803D that works with USB power (some functions) and the PSU that also powers the Galvo.
The Galvo is a...
Thanks all,
Unfortunately the controller cant control the delay because the outputs are used up.
Crutschow, is it possible that this circuit will also act as a soft start?
Thanks.
Hello Klaus,
Maybe I wasnt clear enough. I have attached a basic drawing of what the system is like. On the right is the PSU that I was talking about. This PSU powers the galvo control and it also has a pass-thru to the galvo head, which also receives its power from the same PSU. The control...
Hello,
I need help on something that I cant quite get my head around. I am using a psu with +15v and -15v output for a galvo head. For the specific head, I need to add a delay circuit that delays both power lines for a sec. I found a lot of positive voltage delay circuits but dont have a clue...
If I can get this working I will be driving a 2x8 character 5x7 LED matrix setup. According to the HD44780 sheet, I should be using 1/5 bias and 1/16 duty, which means all the resistors between V1-V5 should be same, and thats how it is currently with 5 2.2K resistors. So, this is probably not...
Exactly!
Thats what I am trying to understand and need help on. Xavier says that DF (or M for HD44780) from HD44780 is connected to the CD4001 and 273 and those are the only connection. However, I can not get that working. I am wondering how crucial the resistors on the V1, V2, V3, V4 and V5...
Well, according to the authors site, by using NOR gates...Please check the site here
xavier.fenard.free.fr/AffGeant.htm
and here on page 3 by a Polish guy...
https://www.elektroda.pl/rtvforum/topic201946-60.html
I was able to get in touch with Xavier, but I dont think we understand each...
Yes, exactly. One of the OE lines is connected to the E pin on the HD44780, but the other one is not specified, thats why I need the help:). I have no idea where it should go...
My test setup and the HD44780 pins are below:
What I could understand from Xavier's page is that DF is from the HD44780 chip (which I tried to tap on the LCD), the X is I do not know where it goes, no information is given, the M is supposedly for GND (?) as most of the IC's used in the...
Hello,
I am trying to make a HD44780 compatible LED Dot matrix display. Apparently, a French guy made a design that worked, can be found here: **broken link removed**
However, when I replicated his design, from the images that he presents, all I got was a couple of flashing lines on one of the...
Hello All,
I am trying to simulate a HD44780 in Proteus (or any other program that may have HD44780) but I can not seem to find the 80 pin chip without the character glass. I just want the chip itself for the simulation. Is it possible to make one from the LCD s in Proteus, or is there another...
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