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thanks FvM.
I looked at it using an oscilloscope. the vertical pulses are present and the level is similar to the Hsync pulse.
so it might be a frequency issue as you've mentioned..
Any idea to correct it??
Thanks
Hi all.
I recently got a project to replace the old CRT display of a machine with an LCD. the output is monochrome composite signal. the problem is that, when I connect it to the LCD's composite input, the picture keeps on rolling down. the horizontal part is ok though.
and the weird thing is...
Hi all,
I'm recently working on a project of re-designing a memory card for a paper cutting machine (Polar Mohr EMC 92). It is a battery backed, removable card which consists of 8x TC5514 chips (2 chips x 4 groups to connect to 8 bit bus of the 8085, Please see the picture attached "1st and 2nd...
Thanx for the reply..
But this is not a hobby project. This project is going to be implemented in highly noisy environment, which several large AC motors and other noisy equipment are running. So, because of the low voltage of the sensor output, if any noise is coupled, and reading is go wrong...
Hi all..
I'm doing a project, which I think I'll need some help from you guys.
I have a light sensor (TSL251R) and its output voltage is 3.3V max. I need to fix the sensor bit far from the control board (about 5m) so that I think I need some sort of analog signal conditioning to interface it to...
hi all,
I recently bought a second hand Meiki MDM-1 injection molding machine without operator's manual. i Google for it and searched all the ways possible for me and failed. so if anybody can send it to me is highly appreciated.
thanx
WHATT ?????? it'll destroy the circuit connected to output.. coz as per the simulatuion, then it'll have the input voltage at the output...... !!!!!!!!!!!
Can anybody please help me with this prob?? I need a 5V supply which the input supply should be around 50VDC and should be able to withstand around 5A. I tried the circuit below and it fails just after exceeding 2A. is anything wrong I have done with the circuit?? or I'm well appreciate, if...
Thanx guys for the replies.
It seems its a ridiculous idea to speed control of a 3 phase motor using triacs. I'm giving it up.
Now I need to study more on Variable Frequency Drives instead..
Hi all..
Is there any other way to control the speed of a 3-phase AC induction motor (ACIM) other than using an inverter? I mean, for example, a method such as, 3, single phase TRIAC control circuits combined together or something?
ON semiconductor had released a good app note (AND8011-D)...
Thanx for the valuable information FvM.
But as I can remember, the labels on the machine says its 230V 30A and 60Hz (we use 50Hz here in Sri Lanka though.). it is very dangerous to measure lamp voltage in operation. isn't it?? coz, if the ignitor doesn't cut off properly, it would be several...
I suspected that too. but the lamp's light seems normal and with my experience, I cannot see any anomalies in the lamp. But now I can understand the 19A is pretty much higher for the lamp. So maybe the ballast is defective.,
But how do I check the ballast without knowing the specs or lamp...
Thanx FvM for very very quick answer.
The Machine is "Theimer Montakop 95" and its a Platemaker. (you might have heard of it). The whole machine is rated to 30A not 65A. Unfortunately the lamp and transformer specification are unavailable. the voltages are indicated in the label above the...
Hi all,
I got a little problem recently. :-(
An HID MH lamp in a UV curing machine (a.k.a platemaker or printing down frame) used in printing industry, is using a Transformer to step up 230V to 800V to supply the necessary voltage for the lamp. the transformer primary is working as an...
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