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FM Transmitter with BC548

Small Audio Amplifier

Download eagle files: Small Audio Amplifier

Download eprom SANYO CLT 75KM

Download eprom: base.e2p Hanset1.e2p Hanset2.e2p

Download eprom SAMSUNG SPR915B

Download eprom: tel SAMSUNG SP-R915Bbase93C46.bin tel SAMSUNG SP-R915HANSET93C46.bin

USB Led Light

Service Manual SONY AVD-K700P

Download Service Manual: SONY AVD-K700P

Power Supply regulater 1.5 – 30V by LM317

AVR Controlled Dimmer Switch

How does it work? The triac TIC206D (BT136-600D) needs only a small current flowing through the gate to start conducting and turn a light on. This is the reason why they can be directly connected to the microprocessor, which can sink at least 10mA. Most digital circuits can sink much more current then they can [...]

Happy New 2009 Year

We wish you and your family  a Merry Christmas and a Happy New Year.

Car Battery Monitor

The circuit is based on PIC16F819 18-pin microcontroller which has an analog-to-digital (A/D) input to monitor the battery voltage and outputs capable of driving LEDs directly, to keep the component count down. There are seven LEDs in all, giving a good range of voltage indication. The topmost LED, LED1, comes on for voltages above 14V [...]

FM Transmitter Low Power

The PCBs and/or a complete kit for this project can be purchased trough the Nuts & Volts Webstore. From magazine: Nuts&Volts September 2008