The Midea IR signal uses pulse distance encoding. Each pulse (one “time” unit or 1T) is 21 cycles of a 38KHz carrier burst (about 550µs long). A logic “1″ is a 1T pulse followed by a 3T space and takes 2.25ms to transmit. A logic “0″ is a 1T pulse followed by a 1T space [...]

This is the USB controlled Atmega8 microcontroller based power supply. Starting with the Visual Basic and IOCOMP software. FT232RL for the USB connection. Source: Ben

A little bigger than a postage stamp, the Simple Servo Tester lets you control two digital or analog servos without using a transmitter or receiver, just plug in your battery pack to start testing. Use it to check your servos before installing them into your models or to center your servos when setting up linkages. [...]

Atmel does offer an adapter board to support this chip along with another one with slightly more I/O lines. The STK505 adapter, which is reasonably priced at US$75, would be a great solution. Unfortunately, I’m stuck in China and it’s not available over here. So… it’s time for a roll-your-own solution. While a lot of [...]

Schematic & layout for an updated JDM2 PIC Programmer. Includes clock & data filter, Vpp voltage divider for modern PIC microcontrollers (eg USB PIC 18F2455/4455). This programmer uses 6 common components. Though the link says ’16F84(a)’ only, I used it for the more modern (and cheaper) 16F628(a) processors without problems. This programmer has served me [...]

This single chip solution turns your TV into a digital storage oscilloscope with a sampling rate 160 Ksps. As a bonus, five voltages on the five analog inputs can be monitored. No additional video-controller and video-RAM are required. Main goal of this project is an implementation of a high-resolution (512×240 pixels) video generator inside the [...]

Download:Profilo Telra PSU 04TA069

This device uses PIC16C54 to control a triac. One push-button has the UP (increase) function, second one has the DOWN function and the third one is for ON-OFF. Button ON will increase the number on LED display from 00 to 99 which represents triac firing in percentages. Triac can power universal load such as light [...]

Temperature range Display of temperature between -55 and +124 deg C (-67 to 255 deg F)with 0.1 degree resolution between -10 and 100 degrees. Thermostat settings between 1 and 100 deg C (34 to 212 deg F.) Features Simple,cheap,compact design, few components, no surface-mount types. Uses an accurate digital sensor to avoid the need for [...]

This LED clock may not be the easiest to build but surely it is the one with fewer parts that you can find, for that reason I call it “The ANP LED Clock”. (ANP stands for Almost No Parts.) Using the micro controller PIC 16F84A or the 16F628 (same pinout), this clock have more and [...]

Download: lg_lcd_20lc1rb