ZFM-20 fingerprint capture library

Dilshan Jayakody  writes: This ZFM-20 fingerprint library is developed to capture and retrieve fingerprint images from the above sensor module. The main purpose of this library is to use ZFM-20 sensor with PC as low cost fingerprint capture unit and because of that, in-module fingerprint processing and verification functions are not implemented in this library. […]

Simple USB to UART adapter that works with 3.3V and 5V UART signals

The serial UART is a common interface used by many chips and devices. Ginpb designed a USB-to-UART adapter that works with 3.3V and 5V UART signals. The device is based around the FTDI FT232BL USB-to-UART IC with an added 3.3V power supply. The different interface levels are selected by an on-board jumper. Via the forum.

Week in (p)review: August 22, 2010

Here’s some highlights from the past week, in case you missed them: Dynamic Sampling depths on the Logic Sniffer! Continued development on an USB LCD backpack and a computer controlled voltage/current source/sink. You’re welcome to get involved too. An updated Bus Blaster design was posted. Bus Pirate v4 was assembled and tested. There are some […]

Inexpensive multi-programmer update

An update of the inexpensive, medium-speed AVR/PIC/CPLD/Arduino programmer is posted in the forum. This programmer is designed for people who don’t own a programmer, and just want to rescue a bricked PIC or AVR. This version takes into account the pin connection diagram MichaelZ outlined during our last design review. The update has a single […]