Summary of PIC18F2550 USB ISOLATED TRIAC CONTROL CCS C VISUAL BASIC
This article details a project using the PIC18F2550 microcontroller to control AC loads via USB isolation. The system employs an MOC3042 opto-triac driver and a TIC236M triac, allowing 220V/230V loads up to 10A (with a heatsink) or 100W (without). Communication is managed through a Visual Basic COM terminal program or simple batch files, sending commands like "E1" to toggle specific outputs on Port B of the PIC.
Parts used in the PIC18F2550 USB Isolated Triac Control Project:
- PIC18F2550 Microcontroller
- MOC3042 Opto-Triac Driver
- TIC236M Triac
- USB Port (for power and communication)
- RS232 Serial Interface
- Visual Basic COM Terminal Program
- Heat Sink (optional for high loads)
- 330 Ohm Resistor (for LED connection)
PIC18F2550 USB ISOLATED TRIAC CONTROL CCS C VISUAL BASIC
Now you have to wonder to advanced pic controller was quite popular among them PIC18F2550 USB pic18f2520 a good example on how to control the output with the MOC3042 opto triac driver output isolation is being provided and TIC236M… Electronics Projects, PIC18F2550 USB isolated Triac Control CCS C Visual Basic “ccs c examples, microchip projects, microcontroller projects, pic18f2550 projects,
Now you have to wonder to advanced pic controller was quite popular among them PIC18F2550 USB pic18f2520 a good example on how to control the output with the MOC3042 opto triac driver output isolation is being provided and TIC236M working with the 220v loads can be controlled
Source article with triac drive circuit used in the lamp up to 100W without cooling, heating and so on. As indicated loads can be controlled with a coolant 10A (2300W) also isolated driver circuit that can be used in the other controller output
As I said, the source could limp ccs c code circuit diagram of a control program has been prepared with the visual basic. Exe package and source codes given, etc. pic pc communication visual basic example would be to
COM terminal allows you to send and receive serial data on the serial interface of the PC RS232. Adjustable serial ports are COM1, COM2, COM3, COM4. All possible baud rates, parity, number of bits can be set. The serial port settings are saved in an ini file. For new start the terminal program, previous settings are effective.
Unlike other terminal programs: To send any-way 8-bit word by serial port. As input characters (A), the number (0 .. 255), or binary (00001111). -Received data will be output in three formats. -It is a condition of wires DSD, CTS, DSR displayed (black is 0, red is 1). Control lines DTR, RTS are switchable. -A range of characters can be transmitted, wherein the time between sending each character can be set in ms.
COM TERMINAL PROGRAM
Than 8 switch outputs Port B of the PIC18F2550 is used. Power gets the circuit from the USB port. Power supply is separate from the microcontroller and the computer galvanically. switching signals USB socket intended as a virtual serial port COM4. To turn on the first load, send “E1” to turn off “A1” This can be done with any terminal program. Or even easier with a BAT file. ECHO E3> COM4 This turn of the third load.
If you use a triac to the heat sink, consumers can receive up to 10A (2300W). Without heat sink enables you to weigh up to 100 watts. E.G. a lamp. Note the heat sink under voltage (230V) is available. In addition, here is single-pole disconnection. That means current is switched off, voltage remains. Pull for repairs to the consumer mains.
Addendum. I’m reinventing the wheel completely stupid second time. When it accumulates give beautiful solid-state relay. E.G. S202 S02 (current to 8A with the heat sink) Resistance calculation for connection to 5V (5V-2, 2V) / 8mA = 350ohm Minus the mass. Plus over 330 ohm resistor to pin PBx.
Code:
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FILE DOWNLOAD LINK LIST (in TXT format): LINKS-7350.zip
Source: PIC18F2550 USB ISOLATED TRIAC CONTROL CCS C VISUAL BASIC
- How does the system isolate the output?
The project uses an MOC3042 opto-triac driver to provide output isolation between the microcontroller and the 220V load. - Can I control loads up to 10A with this circuit?
Yes, by using a heat sink, consumers can receive up to 10A (2300W); without a heat sink, it supports up to 100 watts. - What software is used for PC communication?
A Visual Basic EXE package named COM TERMINAL PROGRAM is used to send and receive serial data over the RS232 interface. - How do I turn on the first load?
To turn on the first load, you must send the command E1 to the virtual serial port COM4. - Is the power supply galvanically isolated from the computer?
Yes, the circuit power is separate from the microcontroller and the computer, ensuring galvanic isolation. - What happens if I remove the heat sink?
Without a heat sink, the circuit enables you to weigh up to 100 watts, such as a lamp. - Does the single-pole disconnection cut voltage completely?
No, it switches off the current but leaves the voltage present, meaning the consumer mains remain live during repairs. - How is the resistor value calculated for the LED connection?
The calculation is (5V minus 2.2V) divided by 8mA, resulting in a minimum of 350 ohms, plus mass, plus a 330 ohm resistor.
