You Are Here: Home » Posts tagged "Schematic"

400VA AC Light Dimmer

This is a simple TRIAC AC load dimmer used to control the power of a resistive load such as incandescent lamp or heater element. The max load it can handle is 400VA. Such a circuit is often found on cheap commercial light dimmers and is prooven to work reliable for the rated power. The circuit is working by controlling the phase of the 220VAC voltage allowing the load to be powered for less than 360º of the ...

Read more

Synchronous Step-Down Switching Regulator

Description The LT3690 is an adjustable frequency monolithic buck switching regulator that accepts input voltages up to 36V. A high efficiency 90mΩ switch is included on the device along with the boost diode and the necessary oscillator, control, and logic circuitry. The internal synchronous power switch of 30mΩ increases efficiency and eliminates the need for an external Schottky catch diode. Current mode ...

Read more

GTP USB PIC PROGRAMMER

This work includes, GTP USB (not plus or lite) . The schematic, photos and PCB have been developed by PICMASTERS based on some valuable works done before. This programmer supports pic10F, 12F, 16C, 16F, 18F,24Cxx Eeprom. Unfortunately, it works with only Winpic800 v.355. We have succesfully tried it with some pics; PIC18F252, 18F2455, 18F2550, 18F2520, 16F84, 16F628 and 24C32 eeprom. The best and fastest me ...

Read more

DIY DC Amp Volt Watt Meter

in this article, I will use the current monitor based on the ZXCT series IC for measuring current voltage and watts. Part list: Arduino-compability board High side current sense monitor ZXCT1010 (PDF) 0.1R 1W 1% shunt resistor 1K resistor 2.4K resistor 500R Trimmer Potentiometer Nokia 5110 (optional) Plastic enclosure In my task needed measure the load current of not more than 2A, the range of 200 mA to 1.5 ...

Read more

How to interface 8 LCD displays and 24 leds with only two wires

A couple of weeks ago, I just post a review of my MCP23017 breakout board. As the board configuration allows to connect up to 8 of these boards, I decided to do it and see that it really works. My goal is interface 8 LCD displays with two wires: SDA and SCL from an I2C bus. With direct IO`s of a microcontroller, you need at least 48 lines to control all the displays. With this option (and a little of softwa ...

Read more

Allegro A4988 and Arduino (3)

In the last part of my tutorial about the A4988 driver, I’m going to explain how to build a controller to adjust speed and rotation direction of a stepper motor. Schematics I used the same setup introduced in a previous post: an Arduino Uno; a LCD Keypad shield; a Pololu A4988 driver mounted on a breadboard; a NEMA17 stepper motor. GUI Using the controller, you can adjust the speed (from 0 to 70 RPM, revolu ...

Read more

Minimalist AVR programmer

I always like a challenge, so when I saw [simpleavr]s vusbtiny programmer, I started to wonder how small I could make an AVR programmer. All in all I’m pretty pleased with the result. The schematic is almost the same as the original one. I only added a LED an resistor to indicate a proper power supply. Since I wanted to try a simple USB connector made only with some bare pads on the PCB, I also added an add ...

Read more
Scroll to top