Memory lead somewhere in Raspberry Pi 3
Hi, I am using a Raspberry Pi 3 to control solar cells and charge LiIon batteries. I have four processes each running in a different shell that pass messages to another controlling process. It runs...
View ArticleMemory leak somewhere in Raspberry Pi 3
Hi, I am using a Raspberry Pi 3 to control solar cells and charge LiIon batteries. I have four processes each running in a different shell that pass messages to another controlling process. It runs...
View ArticleHow to use arduino+sim800+firebase?
Hello, I would like to use firebase with arduino+sim7100/sim800, I found one article that uses UC20 3g module for this. Article Link :...
View ArticleCurrent sense amplifier liner calibration
Dear all, I am running a bldc motor Infineon TLE9879 chip. Now I want to measure the current flowing through the motor. so I use the current sense amplifier where the motor current is converted to a...
View ArticleAnyone used a High Flying HF-LBP100-1 before
I was wondering whether anyone had any experience with the HF-LBP100-1? They seem to be positioned as a WiFi over SPI for lower powered MCs, like the ESP2688 originally was. I wondered if anyone had...
View ArticleRS-232 and RS-232 protocol
I am little bit confused with “RS-232 protocol” As understand RS-232 is integrated circuit that is used to transmit data from one equipment to another or receive data from one equipment to another. One...
View ArticleAdjustable timer with PIC 16F
Hello, Need a code for adjustable timer using PIC 16F628A or 16F877A (have 16F877A on my house, but, 16F628A is easy to find and buy). This timer maybe count 1 minute to 20 minutes and have a 16x2 LCD...
View ArticleReception of characters via UART interrupt [FreeRTOS - Cortex M7]
Hi, I have used an interrupt to read a character via UART. I'm using STM32 CubeMx to generate initialization code for UART and the interrupt. For example this would be my ISR: extern uint8_t...
View ArticleClik here to view.
Pulsing 4026B 7 seg driver with PIC and it won't work.
Hi! I'm working on a circuit using a GENIE E18 to pulse a 4026B and get a count. The problem is the clock does not seem to be registering the pulse. I've run the signal through a TIP121 transistor....
View ArticleZero crossing detector using 741 IC to measure frequency
I want to make a zero crossing detector using 741 IC to measure frequency of the supply (220V). I am using 12 V supply for 7 pin of IC. fig shows the detail but I am not getting 12 V and 0 V as...
View ArticleUnidentifiable SOC (ZKTECO Biopad 100, Windows Embedded CE)
Hey everyone, recently picked up a quite interesting device for cheap, because I thought it would be interesting to reverse engineer it and create something more useful out of it. I'm pretty sure the...
View ArticleHardware vs Software
I am confused on hardware module and software program. Many links refer hardware and software protocol. Hardware Hardware Uart Hardware SPI Hardware ADC Hardware CAN Software Software Uart Software SPI...
View ArticlePIC16F876A and GPS; Overrun error
I am trying to configure a GPS receiver with PIC16F876A. In the code below i am receiving characters from UART, and checking whether received character is $. If condition is true, receive characters...
View Articleswitching ac motor from MCU
hi I desinged a pcb with 1000uf on regulator input and 100 nf on its output, there is also 100nf connected the MCU VCC close to it. the circuit is working fine with dc motor and ac lamp but the problem...
View ArticleArduino motor controller high pitch noise
Hi everyone, I am controllering a brushed dc motor with a dc motor controller that accepts PWM. Immediately when the controller gets a PWM signal from the arduino, the motor gives off a high pitch...
View ArticlePIC16F1789 adc reading accuracy problem
i am using PIC16F1789 (internal osc 32MHz) controller to measure voltage using using 12bit ADC. i generated circuit to measure 1860 mV but PIC do not giving accurate adc count value. it is giving me...
View ArticleTrying to Complete Project but Got the Error espcomm_sync failed
Hi All, I am trying to complete a project similar to the one shown below but I am using a 3 prong DHT instead of the 4 pronged one in the picture. Other than that that is the only deviation that I have...
View ArticleLevel Shifting Problem
OK...here's an absolute rarity: I feel completely brain dead in solving this particular problem. I've got a PIC18F65K90 with which I want to drive the SHDN pin of an LTC2050. Currently, RF7 of the PIC...
View ArticleATmega328p UART framing error does not occur!
There is a protocole over serial port as following: 1. no signal (idle) is High (+5V). 2. reset signal is a 60 us Low (0v) pulse. 3. data signal is : 250 kbps/8 bits/2 stop/no parity I want to detect...
View ArticleQuestion about compiled code size
I have an interesting issue that I am curious if anyone on here has any insight into. I have been using CooIDE 1.7.8 and ARM GNU compiler (ver 4.7) for developing code on STM32 parts. I finished a...
View Article