Re: ULN2003 max input voltage?
I need to provide R Y B to board. I think no need. board only need R phase for its controller electronics part and neutral. but 100mA fuse is blowing again and again after i connect room controlled device. Before room controlled device it is ok. I dont know what to do....
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Last edited by waqqas.qayyum1; 03-07-2017, 06:49 PM.
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Re: ULN2003 max input voltage?
Sir the way I explained, I made the circuit like that. I removed all the board relays and connected external relays. I gave Neutral and Phase input to board. Before the board the board was getting R N B N Y N because the heating elements were getting current pass through the relays contacts. so i removed the relays and provided only N and Phase to the board. When i turn on the circuit it works normally but when i connect controller to the board the neutral fuse blows each time i connect the controller. I dont know what is the issue here.
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Re: ULN2003 max input voltage?
Dear sir thank you so much. I try to remove relays from the board. Any how if you know the best idea of removing the relays or how to add other relays by making board relays as redundent so please let me know.
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Re: ULN2003 max input voltage?
very difficult to remove the old relays from the board. It damages the board actually
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Re: ULN2003 max input voltage?
actually all will not be turned on at the same time. According to this cct 6 relays (for heating elements R N, Y N, B N) will work at the same time. 1 Relay ( inlet solenoid relay for water intake) will work when all the other relays will be off. and the last relay ( drain relay ) will work when the rest all will be off. so external relays if i will add in parallel will work in together with the board relays like 12 relays at a time and 2 relays at a time and 2 relays at a time so it makes total sum of working of 16 relays.
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Re: ULN2003 max input voltage?
actually i will solder 8 more relays from down side in parallel with the relays on the board. so the relays on board will be dummy or will not take any load. the same new relays will be operation and can be changed at any time in case of any fault. so this modification will work or not?
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Re: ULN2003 max input voltage?
Actually sir i want to modify this circuit. The modification is i need to connect 8 parallel relays with the relays on the board. Now total relays will become 16. Actually the relays on board burn mostly and very difficult to change again and again so i need to connect external relays in parallel along with the relays on the board. when the board will turn on the board relays at the same time the external 8 relays will also be turned on so any time if the external relays with base will be burned out i can change easily. so is it possible or ic will...
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Re: ULN2003 max input voltage?
Dear sir so can i use 16 relays? 2 relay per channel for ULN2803A. Actually data sheet made me confused. each relay coil resistance is 165 ohm and coil volt is 12V. so can i make operational all of the 16 relays at the same time? is it possible. it will not effect the ic life?
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Re: ULN2003 max input voltage?
I am so confused that 500mA is the max current of all the outputs or its a max current per output pin?
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Re: ULN2003 max input voltage?
I am using ULN2803A for my project. I want to connect 2 relays at each pin. Its mean 8 channel would have 16 relays. So it will work or it will burn the ic? Can any one please give me the answer. I shall be very thankful to you. I am working on this project but I am stucked here.
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Re: ULN2003 max input voltage?
Thank you so much sir. Thanks alot.
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Re: Getting a display from Apricot computer
Dear Sir,
What is the max voltage we can supply at inputs and supply voltage??
Mean 7 Channel so 7 inputs = What can be the max input volt?
and comm that is supply voltage = what could be max supply volt to this ic?
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ULN2003 max input voltage?
Dear Sir,
Can you please tell me that what could be the maximum voltage we can provide at the input of ULN2003.. Please provide the answer I shall be very thankful to you.
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I want to make one master and three slaves. How can I set dip switch setting so that one can work as master and control the remaining three as slaves. Kindly please send me the instruction manual for dip switch settings for 1 master and 3 salves first. Also guide me what is the functionality of the dip switch. Is it something related to time or setting for master and slave. Please guide me as soon as possible so that I can place an order for my project.
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Re: Element ELEFW40C won't turn on.
I want to make one master and three slaves. How can I set dip switch setting so that one can work as master and control the remaining three as slaves. Kindly please send me the instruction manual for dip switch settings for 1 master and 3 salves first. Also guide me what is the functionality of the dip switch. Is it something related to time or setting for master and slave. Please guide me as soon as possible so that I can place an order for my project....
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Re: LM317T Voltage Regulator Input Resistor Cremation.
Sir thanks a lot for your reply so can I assemble the below circuit on PCB? It will work??? Sir one thing i m still confused that there is written OUTPUT on the tab so pin 2 and tab will not be connected??? or if we dont connect the tab and connect it to pcb for cooling purposes so it will work?
Sir what is difference & purpose of these two types of tab connections?...
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