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Yes! Everything seems fine! Time delay caused by the 6n136 is fine too. There are no time deviations. I`ve checked with logic analyzer on the back side(3.3V) - the baud rate and settings are correct!
I`ve tried to listen the market device and it`s all the same, but the node responds. Is there a...
Greetings! I`m trying to make a current loop. Here is my schematic
When I connected it through the another node(I`ll call it "slave" and my node should be "master"), I`m receiving my data correctly. As you can see the current loop is pumping pulses on both receivers. The 6n136 is fast enough and...
betwixt, this is good idea, but it`s not suitable in my case. I don`t like the idea to use diodes to make AND. I`m afraid the voltage levels will not be suitable for the uC logic. So I decided to use a standard AND element! It will do the job 100%!
Thanks!
Diode + pull up is it going to work? I though about this option but I think it has to be a pull down and it changes the logic of operation - it inverts the data... I`ll do a few simos...
Greetings! I have to combine current loop and RS232 or RS485 and RS232. I have 2 free UART interfaces on a PIC uC and I have connected to them a current loop and RS485. I`m using 6N136 optocouplers for the current loop and SP485EEN for RS232. Now I have to add additional RS232. So it must share...
I think I did it! I`ll add a diode and transistor on the 6N136 output and I`ll supply the optocoupler directly from the power supply. I think this will do the trick!
Thanks!
Sorry! I`ve written through a phone! My test circuit is with EL817S. The switching time is close to 20us(per optocoupler). I think this is a lot. My current source is simple VT based with current limiter and temperature correction. It`s on 15V. The current loop should work between 4-20mA.
I...
Hi. It will be digital current loop with baud rate up to 19200. First I've tried with regular optocoupler but it has very long switching time and I don't like it in spite of fact it's working. So I have current source, income data optocoupler, another node and TX optocoupler. I am not quite sure...
Greetings! I`m looking for schematic for 6N136 so I can control a current loop up to 20mA. So I need a high speed optocoupler such as 6N136 because of the baud rate, but it`s max current is not enough. So is there a way to achieve this by adding and additional VT for example? My supply voltage...
I`m making bipolar power supply using transformer without mid point. Because of that I`m using single diode. I need larger on the output because the supplied schematic drains current on pulses and I need big buffer.
I`ll fix this somehow, but I have another problem. I`m draining about 40mA. In...
Greatings! I have a problem with LM337.
This is my schematic.
This is working fine, but I decided I need bigger cap on the output. So I exchage the 100uF Cap with 2200uF. But this burns the regulator. What`s happenning here?! Where is the problem?!
Thanks!
Greatings! I saught this schematic in the LM2575-ADJ datasheet -
This is for LM2575-12. Is it possible to use this schematic for LM2575-ADJ with adding voltage devider on the feedback pin? Is the algorith for calculation of the devided the same?!
Thanks!
Hi! Could anyone explane how to do pwm correction according to the voltage change?! I have a pwm curve and I can measure the voltage on the bridge fast enough. So I want to use this data to correct the respective pulse.
Thanks!
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