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I want to drive 8 MOSFETs with different sources, so I have to use a transformer with 8 secondaries. My gate frequency is about 30-100kHz. My question: Is it possible to use a PCB coreless transformer, or using frequency wont allow this coreless little transformers?!
I have a 33v input, Can I...
look at the second image, by turning on 4 switches I want to make the bold path. it will make 2 PV units in series and abandon one last PV unit.
matrix converters are mainly for AC, but I have designed one, which u can see.
PV=Photovoltaic , PV units are DC, 10 volt and 10watt.
there is a load at the right side of the picture, so there is not a useless path.
curretn flow in one direction.
I want to series two panel, this is the achievement.
hi,
I have designed a new matrix converter, but I have problem implementing it. As shown in the following image, some MOSFETs are utilized.
I want to turn on some MOSFETs to make a current path as shown in following image.
i don't know how to drive the MOSFETs to do this task. Please help...
I found the problem!
I tried so much to filter the noisy voltage but no use!
I observed that when the lm2576 is supplying more than 1A suddenly voltage drop to 3.5V!!! and I fixed it by adding some inductance in default schematic!
i found the problem!
but i dont know how to solve it!
the voltage output of lm2576 is very noisy, and the PIC will work so fast, at least 5times faster! I can not measure it.
I have use a 3300uF, but no use:(
Hello!
I have designed a circuit for a specific job, I used a LM2576 for regulating input voltage to 4.3V and a PIC18F4550 for doing the work!
if I supply the circuit with a 12V DC source, it works Fine!
but if I use a 17V PV panel, it works 10times faster!!!! and all the time synchronizing...
I have solved this myself!
because of 3.3v usart in sim800 i have used circuit proposed in https://www.hobbytronics.co.uk/mosfet-voltage-level-converter and one of the mosfets through the problem so the whole usart encounter the problem.
hi,
I have a sim800 which is so similar to sim900.
I can send commands to make a call or send a sms or ... .
but although I have used the command "AT+CNMI=1,2,0,0,0" and it will respond "OK", there is no indication when new sms or call. please help me.
I am connected to network, there is no...
I think the attachment have problem openning, so I upload it again.
no!, Gnd in circuit is the transformer tank, and gnd in adc is output of 7805, which is middle point of a full wave rectifier, although I probably can connect these together but it is preferred not to.
about 50 -30v.
1- I...
Bellow I have draw a schematic of my circuit. the major of 'other part of circuit' is a rectified transformer.
I want to measure v3 and v6 with an adc, then do some calculation and protection.
v3 is about 30mv to 300mv and v6 is about 150v.
v1 and v2 are 300v max.
v4 is about 4v and v5 about...
hi,
I want to measure voltage difference between 2 point in my circuit, that is about 30-500mv using adc.the problem is that the voltage of each point is about 300 VDC.
so please help me with measuring this with adc.
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