Digitpots. Series and parallel connection. (AndySilver)
Hello, guys! My question is: can a connect digitpots in parallel and in series and use itas ordinary resistors? Thanks for your time?Best regards. Andrei...
View ArticleC Code for MCP3204 (mbcdev)
Hello, Hopefully, I am posting this in the right place! I am working on a project that interfaces an MCP3204 A/D converter to a Raspberry Pi 3 Model B. I actually now have some code up and running that...
View ArticleHigh-pass filter design: capacitor selection? (elberto)
Hi to all, I need to design high-pass active filter (Butterworth type).I've found several tools to design active high-pass filter using Sallen-key schematics, but for my filter purposes (0,1 Hz, max...
View ArticleMCP3424 I2C Slave Device Capacitance (Manikandan M V)
Hi,We're connecting four Quad channel ADC MCP3424 in a common I2C bus. Regarding this, we would like to explore the Open Drain pin capacitance during ON and OFF conditions. However, we observe 4pF pin...
View ArticleSupertex AN-H13 app note question (david_ridgway)
Hello, I have a few questions regarding the app note from Supertex, AN-H13 for the HV9110 pwm IC. 1) On page three, under The Design section, there is a 150ns subtracted from the ON time. Where does...
View Article[MCP73831/MCP73832] SOT package, safe value for maximum charging current?...
I made battery charger using MCP73832, circuit very simple, powered by micro-USB to charge 2000mAh battery.Schematic as suggested in datasheet (2k resistor, so 500mA charge current).It correctly works...
View ArticleDr. Wattson - Energy Monitoring Board for Arduino, based on MCP39F521...
Hello everyone! I have created a new energy monitoring breakout board based on the MCP39F521 for Arduino and other MCUs, that I call Dr. Wattson - please check out http://bit.ly/2wg2wte for more...
View ArticleHelp with MPC39F521, PIC16F and I2C bus. (alex mar)
Hi all, My setup is, a PIC16LF18344 it's communicates with a MCP39F521, both are isolated so I used a TI ISO1540 i2c isolator. I'm trying use the MCC I2c but it's tangled for me so I decied make my own...
View ArticleIs there any possibility for fixing Vref in ADC by software (SAMO6)
Please Help, I am interfacing LM35 with PIC18F4550.How can I display result of ADC on LCD 16x2, I have left shifted the result in ADC(ADFM=0) and just sent value stored in ADRESH to lcd after doing...
View ArticleUSB2240 chip heating (mudassir@isportsanalysis.com)
I have working on USB2240 - SD to USB bridge, I have incorporated all the required components which is required to run the chip (seen from the USB2240 Evaluation board) on to my PCB, all the parts on...
View ArticleSome of MCP2210 eeprom write returned 0xfb after rename the device (misisnik)
Hello I have been saving some data into the internall MCP2210 eeprom. I have many devices with this chip and on some of these is possible to write the data into the eeprom. But on some are not possible...
View ArticleMCP39F511 CT Sensor Interfacing (TS9)
Hi, I have read MCP39F511 Datasheet . The Document and Application Circuit shows interfacing Shunt resistance for measurement for Current. Can somebody suggest me how to interface CT (Different CTs...
View Article1 wire for DS2401 (Endinar)
Hi I have some problems with an 1 wire communication. My spects : MPLAB X IDE V4.00 XC32 v1.44 HARMONY V2.3b ICD3 a custom board with PIC32MZ2048ECH144 and a 24Mhz external clock DS2401 pin 2 linked to...
View ArticleMCP39F511 Datasheet problem (andywcchung)
Hi all, I am using MCP39F511 to design a AC meter for EV Charging System. I find that there are different between datasheet schematic and demo board schematic. the MCP39F511 using V1+ to measure...
View ArticleFake MCP1700 3.3v? (tubos)
I have bought a few of these voltage regulators on ebay but the dont perform as from the datasheet. WHen I draw only 100mA from the 3v3 output , the output voltage drops to 2v. Normally mcp1700...
View ArticleATM90E32AS Modify Power Gain Records (Tomas_C)
Hi.In modify records use 55AA The I and U Gain (UgainA, IgainA) registers are modified with the value and are executed. Correct.The "Power Gain" (PQGainA, PQGainB, PQGainC, PQGainT) registers are...
View ArticleDriving IGBTs (TC1410) (Asier)
Hi, I'm driving an IGBT through a port of my PIC and a resistor of 1K connected to the gate. It works well, but sometimes when I start my circuit the IGBT breaks down. It gets shortcircuit. I've also...
View ArticleMIC3223 Catches on Fire (EEBeast)
Hello, I am using an MIC3223 LED driver and having some issues. If I connect my LED string load then apply input power, enable and dim PWM to the MIC3223, then disconnect LED load, then reconnect LED...
View ArticlePAC1720 is transmitting bogus data at low temperatures (svensteudte)
Hello, I'm using the PAC1720 on one of my devices which may operate at very low temperatures (-70°C). The PAC1720 is doing a great job, but somehow it is transmitting false data below ~-3°C. The chip...
View ArticleSHA256 chip? (alikim)
Hi, Does anyone know if it's possible to buy a device for PC designed as a USB stick or the one you can plug in to the motherboard, which is fed with some strings and calculates SHA256 of them as...
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