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  1. HarryA1

    programming the atmega 328p microcontroller previous article on this subject

    see recent post https://www.electronics-lab.com/community/index.php?/topic/48683-programming-the-atmega-328p-microcontroller-previous-article-on-this-subject/#comment-166370 I do not know anything about the Jaycar; sorry  can not help you there.   I just use the Arduino IDE. By the way there ...
  2. HarryA1

    programming the atmega 328p microcontroller previous article on this subject

    If you look  in the IDE at [tools] -> boards you will see the Nano and the Duemilanove. You  will not see the port listed until you select the board and have a board or adapter connected.  The Meg2560 has a different  AVR microcontroller; an  ATmega2560. If you search on Youtube for the...
  3. HarryA1

    programming the atmega 328p microcontroller previous article on this subject

    "What is the board type?" Note: when programming the Atmega328p MCU using the Arduino IDE, the matching board type you have to select is the “Arduino Duemilanove or Nano w/ ATmega328” board. :What port would this be? I take it to be the comport related to the IDE and PC. Shown in [tools] menu...
  4. HarryA1

    Buck Converter Design

    In LTspice on selecting components open the directory [Power Products] in the listing find LTC3705 when you click on it you will see "Open this macromodel's example circuit" that will display the circuit.  You can select RUN and the output display will come up. You can poke around the circuit...
  5. HarryA1

    Bluetooth

    "  {Bluetooth} It is mainly used as an alternative to wire connections, to exchange files between nearby portable devices and connect cell phones and music players with wireless headphones."  You may violate some code of ethics by connecting two Bluetooth devices together by wire...
  6. HarryA1

    Buck Converter Design

    As this chip is made by Analog  and Analog owns LTspice simulator the circuit appears in the simulator and can be explored there. The circuit there is slightly different. Note it uses the FDS6680A mosfets. If you want 10 amperes make sure the mosfets can handle the current. Go here and put...
  7. HarryA1

    Buck Converter Design

    There is a lot to designing a dc to dc buck converter. For example see: https://www.maximintegrated.com/en/design/technical-documents/tutorials/2/2031.html You can buy one for far less than the cost of the parts to build one. See...
  8. HarryA1

    Home made inverter not working perfectly

    "My inverter is not same to the real inverter working principle"  What does your  inverter look like? Schematic diagram? "Is there anyone suggest me a diagram for inverter" What type of  inverter are your trying to build?  Are you looking for 12 volts dc to 120/220 volts ac for example?
  9. HarryA1

    Arduino with RFID error

    "scan picc to see uid, sak, type, and data blocks."  huh? The mfrc522 supports three interfaces:  • Serial Peripheral Interface (SPI) • Serial UART (similar to RS232 with voltage levels dependant on pin voltage supply) • I2C-bus interface Which one are you using? What software are you using?
  10. HarryA1

    Animal Repeller

    Here are a couple of circuits that maybe helpful: https://www.homemade-circuits.com/dog-barking-preventer-circuit/#:~:text=Referring to the above shown dog bark inhibitor,using the IC2 and the speaker driver stage. and: https://www.electroschematics.com/dog-repellent-circuit/ Perhaps a...
  11. HarryA1

    New.....I need help on replacing a fuse, please.

    Pack of 5, T630mA250V, T630mA 250V, T630m 250V Cartridge Ceramic Fuses 5X20mm see for example: https://www.ebay.com/itm/151136254075?chn=ps&norover=1&mkevt=1&mkrid=711-213727-13078-0 T for time delay? From Amazon.com: Pack of 5, T630mAL250V, T630mA 250V, T630mL250V Cartridge...
  12. HarryA1

    Can anyone Identify this mosfet?

    Looking on Ebay  you see G04N60 from China.  Not  much help. Searching on A1F02LSIN takes you to this site; not very helpful but more interesting. https://www.barenecessities.com/product.aspx?pfid=Empreinte07151&cm_mmc=BPLA_NonBrand-_-Bra-_-Empreinte422-_-Empreinte07151&
  13. HarryA1

    Tablet charging IC replacement

    Do you think it is a D6Gi1K or D6GiLK ?  After the G it looks like an aye i gather. Not even close: http://twitpic.com/d6gilk  SOT323 is a SMD package type; it has only three leads. Often a transistor.
  14. HarryA1

    One problem about building an electronic level with Arduino

    I have for sometime now been dorking around with the MPU6050. I started out using Joop Brokking's code for a quadcopter but put it aside to educate myself on the PID software and the MPU6050 software. As you say there always seems to be problems with the MPU6060 code running away - the output...
  15. HarryA1

    Smd device

    SQ2LA appears in these two by Google advance search but I could not find any info at the web site: http://www.smdmark.com/en-US/ic-492522.html
  16. HarryA1

    Looking for a board that can send email when tripped on WiFi

    You may find the ESP8266 WiFi transceiver  interesting: https://circuitdigest.com/microcontroller-projects/getting-started-with-esp8266-module
  17. HarryA1

    Looking for a board that can send email when tripped on WiFi

    Sorry I can not help you. I would be challenged doing it with a microcontroller: https://arduinogetstarted.com/tutorials/arduino-send-email
  18. HarryA1

    Through-Beam Photoelectric Beam Sensor

    I used a infrared  transistor as a detector and diode emitter to make measurements on my quadcopter by having the blade pass through a gap with one on each side. You can get similar optical detector devices already mounted in pairs and separate them I would think. See this one for example...
  19. HarryA1

    Circuit to increase CEMF spikes

    It is some where in here: So a henry = an ohm per hertz? see: https://en.wikipedia.org/wiki/Henry_(unit) See the RL calculator here: http://learningaboutelectronics.com/Articles/RC-RL-time-constant-calculator.php#answer2 I will try it in the tina-ti simulator - we have a mutual dislike for...
  20. HarryA1

    Circuit to increase CEMF spikes

    It takes in the order of 200ms for the current to reach maximum in the simulator. The current through one coil is about 1.18 amperes. The voltage across the coils is about 200kv - you better wear rubber boots! Perhaps the simulator got carried away. There is an equation: time =...
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