Today I would like to present USBtiny programmer with USB interface. The heart of the system is ATtiny2313.

Source:elektroda.pl Download:USBtiny programmer

Amplifier for Subwoofer with TDA2030.

Source: elektroda.pl

This is simple thermometer with just few components.
The brain is PIC16F84A and sensor is DS18B20. Range of sensor is -55 to 125°C is possible if ONLY the sensor is in that area not the whole device!

Source: maco

This Programmer,programs pic16f84a and pic16c84 very simple and works fine.

Source: maco

This project is a 3 button mini IR remote control which transmits 12-bit SIRC IR signals as used by Sony remote controls.  It has been designed to work with the  2-channel relay driver board also on this website.

Source: picprojects

This project is a 2 channel infrared (IR) remote controlled relay driver with power saving.  It works with 12-bit SIRC IR signals as used by Sony remote controls.
The controller also features a power save feature which reduces the relay holding voltage to 50% of the relays nominal operating voltage once [...]

This project is a simple and practical measure and know the level of reservoir. The component IC CMOS 4066 used as switcher on any level detector/sensor that connect the negative polarity pin of each LED to ground. Buzzer will be sounded if full level sensor achieved.

Source: iloveelectronic

The ESR Meter is basically an AC Ohmmeter with special scales and protective circuitry. It provides a continuous reading of series resistance in electrolytic capacitors. It operates at 100 kHz to keep the capacitive reactance factor near zero.

Source: iloveelectronic

This thermostat with ATTiny25 Atmel microcontroller would only allow the fridge to go up to a maximum of 5 degrees… hardly an ideal beer brewing temperature.
Source:aliask

The servo testers which can be found in shops are quite expensive and the shematics published here and there do not achieve the requested precision. Most of the time they are based on the famous NE555 timer IC and are limited to one function.
The use of a PIC (here 16F84 or 16F628) gives the opportunity [...]

This project DoorBell was created by Quozl . He used microcontroller PIC 16F84.
A microcontroller driven doorbell circuit with features:
one second instant pulse output,
one second delayed pulse output,
two minute lighting output,
latching has been triggered indicator,
processor alive indicator,
ignore additional trigger for preset duration.
Source: Quozl