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EDIT: I would like to add some more information.
The TRIAC appears to be BT 139-500. This is a high voltage, high power triac. I do not know the reason for using such a big component with 1/4 W chip resistors.
Secondly, two questions still remain
How do I go about testing this circuit...
I came acros this circuit, but I am unable to identify its use. It was sent to me by a client for designing its layout, now they want me to electrically test it. But I was not provided any detail as to what it does, please help.
It is has 3 pins with a heat sink attached.
It looks like a lamp...
In the end it was only human error that prevented the circuit to work. After correcting the LCD VCC and VDD connections and correcting the contrast everything worked according to plan, except one minor change from the simulated circuit, the switches had to be grounded instead of pulled up.
With...
Connecting 2 batteries in parallel will always give voltage equal to the stronger battery.They will not add or average.
Connecting 2 output pins of an IC can also work if the output of both pins is same. This type of solution is also used in ULN where 2 output pins are connected together to get...
So you want to make a 8 bit adder? If this is your first project and you have no knowledge of electronics I suggest that you start with 4 bit adder. Also instead of using AND OR gates use SR flip flops ICs you will have to use much less hardware.
But what is a flip flop you will ask. SR flip...
If you look at my code you will see that the number is split and then 48 is added induvidually to each digit, therefore I can display numbers greater than 9. Besides the simulation is working perfectly so the code must be correct.
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I thought the ULN is supposed to provide a...
I feel so stupid right now!
My only mistake was that I was applying inverted power supply to the relay. -24V instead of 24V. F##k me, right?
Now the only problem left is troubleshooting the LCD circuit. Hahaha.
1. Yes I have made P0 as input by putting 0xff.
2. I grounded the DIP switches.
3. I removed the uln and checked the output at P2.6 and P2.7 and it works as expected. Only when I apply the uln and the relays(load) the circuit misbehaves, I think it is due to insufficient current from the uC pins...
Since no one has answered my query. I will add a bit more detail about what the circuit is meant to do.The objective is to switch the relays (ON-OFF) for a specific number of cycles. the cycles are decided by the DIP switches connected to port 0.The number of cycles left are dislayed on the LCD...
If you know a little bit about the MAC terminal then you can install Xcode. It is based on GCC (GNU comiler collection).
This link has more information https://wiki.helsinki.fi/display/HUGG/Installing+the+GNU+compilers+on+Mac+OS+X
I simulated the below attached circuit in Proteus 8 and it works fine. When I made the same circuit with actual components I got the following problems:
1. The port 0 has all pins at 5V DC, I grounded the switches to account for that, but I dont know if the 5V is floating state or high logic in...
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