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Hi all,
the problem is solved. A pin of the FPC connector was not correctly soldered. The circuit works with 2.2nF or 2pF capacitors. This is the initialisation code that I used
void STMPE610_Init(void)
{
__delay_cycles(1000);
STMPE610_Write(SYS_CTRL2, 0x0C); // Enable TSC and...
Hi Forum users,
I try to bring in my project all the advantages that a TFT Display with touchscreen promises. The touchscreen controller STMPE610 with the Displaytech's TFT Display, DT028ATFT-TS, are used but unfortunately till now I cannot make it work.The Initialisation commands are sent with...
Hi forum users,
I try to figure out which is the right decision to make about the following case:
a microcontroller makes a measurement every minute. The data block (RealTime+meas_data) has a size of 8 bytes. These data are sent to an external memory. When the memory is full, then the old data...
Hi BradtheRad!!!
As far as I understood from the inductor current waveform the boost converter should work in discontinuous mode if I want a manageable duty cycle. Till now I was simulating with 10-20kHz switching frequency and the duty cycle was 99.4%.
The picture compares the boost converter...
Hi everybody,
currently I am collecting information for designing a handheld Geiger counter using the tube ZP1401 von Centronic. The whole device will be supplied from a 3.7V rechargeable battery.The battery will be charged from a USB port. The basic components of this device will be a...
Hi all,
the last days I have tested a large number of switching power supplies and the 5% of them face the following problem:
the power supply cannot start up when I plug it to 110Vac or 230Vac at full or no load. It has the UC2844B pwm controller. The following picture is the primary side of...
At the beginning I have put the primary auxiliary winding after the primary winding and I could not have the right voltage for my PWM Controller. Playing with the turns of winding could not give the desired result. Afterwards I have put it between the two secondary windings and the voltage was...
No, the copper foils are only ground shorted.For example the two foils close to primary winding are shorted to the primary ground and the other two with the secondary ground
- - - Updated - - -
I would like to give you the source of my information...please look at pages 6 and 7...
Hi all,
I am currently designing a flyback converter with sandwich winding and I want to reduce the parasitic capacitances between the windings.
In picture 1 you can see the design without copper foil shielding and in picture 2 you can see where I have put them.
Taking into consideration...
Hi all,
I am currently trying to figure out how can I filter the output of a flyback converter, which has the following form at oscilloscope (see attachment)
The measurement was made with ac coupling in order to measure the ripple of the output voltage. As you can see the ripple is at...
Thanks Jeffrey...I believe in simple, effective and reliable solutions too...
I have made a search and I could not find an IC that could fit my application. I need two NOT-Gates and the buzzer works at 12V/6mA. The voltage and the current specs could be found but the inverter ICs have usually 6...
Hi all,
I need a warning buzzer circuit for a redundant power supply. The system is consisted of two power supplies (output: 12V) and after each power supply I use a decoupling diode. The buzzer will work when one the power supplies fails.
Please could you give me some ideas or a direction? If...
Hi there,
I need an advice about choosing the right fuse.
The circuit needs 12VDC/max4A. Preferable is a smd fuse with fuse holder.
Is it right choosing a fuse only taking into consideration the current parameter or should I check something else?
Thanks in advance!!!
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