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Protecting Microcontroller Input Pins from Soft Power Switch – Circuit Schematic
Protecting Microcontroller Input Pins from Soft Power Switch
Soft power switch for a microcontroller where a momentary switch can turn the circuit on (including microcontroller), and then when the switch is pushed a secon...
What transistor to use when building a simple MCU controlled LED blinking circuit – Circuit Schematic
What transistor to use when building a simple MCU controlled LED blinking circuit
This is my conceptual schema to use a PIC12 to control the blinking of 3 LEDs with different blinking patterns. I have a few questions that would like to ask....
integrated circuit Improving absolute precision of ADC to balance battery voltage – Circuit Schematic
integrated circuit Improving absolute precision of ADC to balance battery voltage
Use a relatively high-end microcontroller ( Piccolo TMS320F28035, 12-bit resolution, +/- 4LSB offset, +/- 60 LSB gain ) to measure voltage across stacked batter...
pic PIC16f877A resets due to external noise – Circuit Schematic
pic PIC16f877A resets due to external noise
Connect Relay with pic microcontroller and whenever I put Load on Relay`s Contacts PIC16f877a resets. I some time solve this problem by triggering another relay...
microcontroller driving a relay with transistor and Opto-isolator – Circuit Schematic
microcontroller driving a relay with transistor and Opto-isolator
Controlling a relay with stm32 micro controller. For the isolation I have used a 4N33 opto-isolator. As my relay coil needs around 250 mA, I used a mps222 trans...
Would this USB detection circuit work as expected – Circuit Schematic
Would this USB detection circuit work as expected
When ONLY VR will supply power to circuit, then MCU again will get power from +5V bus, but FTDI will ONLY get VCCIO. On middle of voltage divider R10/R11 I expe...
avr microcontroller circuit – Circuit Schematic
avr microcontroller circuit
Arduino Uno has a ATMEGA328P-PU microcontroller, and bunch of other stuff on the board. I`d like to program the chip without the Arduino software, and only the ...
microcontroller Generate a reset signal from a falling edge trigger – Circuit Schematic
microcontroller Generate a reset signal from a falling edge trigger
Microcontroller design where the mcu is placed in hibernation mode, and can only be awoken by a pulse(high-low-high) signal on the reset pin. (active low) As a ...
microprocessor Map processor to circuit diagram – Circuit Schematic
microprocessor Map processor to circuit diagram
How the processor produces `3` as the output. I realise that this question may be difficult to answer in simple terms. If it is, then a link would help, perhaps...
AVR 1.1V Internal ADC Reference Over-Voltage – Circuit Schematic
AVR 1.1V Internal ADC Reference Over-Voltage
If I use the internal 1. 1V reference for the ADC, and my Analog input exceeds 1. 1V, lets say 2. 5V, is that harmful to my microcontroller Or will ADC value si...
avr How to redesign a circuit to use a current sinking IC rather than a current sourcing IC – Circuit Schematic
avr How to redesign a circuit to use a current sinking IC rather than a current sourcing IC
Building a serial servo controller to learn about electronics and assembly language as part of my hexapod robot project. Quite early on I decided that I needed ...
mosfet Turning a microcontroller on with a flip flop – Circuit Schematic
mosfet Turning a microcontroller on with a flip flop
The goal is to be able to turn on and off the load (an 8051 based uC) by pressing both switches. When the uC turns on, it sets PWR high, and then when the switc...
microcontroller How can I measure battery voltage with my MCU – Circuit Schematic
microcontroller How can I measure battery voltage with my MCU
Currently using the PIC24FJ128GA010 and I am planning to use Input/Output port to connect my 4. 2 V LiPo battery and to check if the voltage value doesn`t go be...
ac I need help matching parts – Circuit Schematic
ac I need help matching parts
I want to use a picMicro 5v microcontroller combined with the figure 10 circuit from Link1 (Shown below) and a circuit similar to Link2 for motor control. It ha...
How to Wire a PIC Microcontroller – Circuit Schematic
How to Wire a PIC Microcontroller
I managed to program my PIC 16f627 to turn on three LEDs when push button (trigger button) is pressed and start a shut down sequence (basically each LED toggles...
microcontroller Driving low-voltage H-bridge directly from MCU – Circuit Schematic
microcontroller Driving low-voltage H-bridge directly from MCU
Drive a small (3. 6V, ...
microcontroller Which schematic is better for keypad connection to an MCU – Circuit Schematic
microcontroller Which schematic is better for keypad connection to an MCU
...
microcontroller Analog to Digital Converter and Negative Voltages – Circuit Schematic
microcontroller Analog to Digital Converter and Negative Voltages
Using the ADC on an ATtiny24 to record a AC signal. The ADC has a range from 0-3. 3V. I`m using a precision rectifier to get rid of the negative portion of the ...
power supply How do I select the accompanying components for an optocoupler – Circuit Schematic
power supply How do I select the accompanying components for an optocoupler
Using an optocoupler ( MOC3021 ) to sense the On/Off state of an electrial appliance using a microcontroller ATmega16L. How do i go about doing this My mains su...
microcontroller Seemingly unstable basic PIC18F2550 circuit – Circuit Schematic
microcontroller Seemingly unstable basic PIC18F2550 circuit
The LED blinks as intended, then stops for an arbitrary time, flashes again a different number of times, off again etc. There doesn`t seem to be any cyclic beha...