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. […]
Dilshan Jayakody published a new build, USB to 3.3V – 5V serial TTL adapter: This post is about experimental USB to 3.3V/5V serial TTL adapter which we build recently to work with both 5V and 3.3V MCUs. This project is mainly based on CH340G seral-USB chip. CH340G is cheap and commonly available serial-USB convert IC […]
j3tstream writes: Like many people, i buy, time to time, some chips or shield from Chinese (dx, aliexpress, ebay) vendors, unfortunately my FTDI FT232 breakout was a fake chip, here he is a interesting thread about that. Jordi Binefa , (thank, you made my day), describe a quickly and easy method to recover a bricked chip, […]
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.
Testing the USB LCD backpacks with two different character LCDs. We’ve noticed ghosting in several different brands of blue/white LCDs, have you had a similar experience? Follow our progress in the development thread.
IPenguin tested the full and mini USB LCD backpack. Follow our progress on this project in the forum.
The full and mini version of the FT232 USB LCD backpack worked right away. Follow our progress in the development thread. We’ve requested a quote for this project, an initial batch will be available about three weeks after we send the final manufacturing package.
Soldered prototypes for the FT232-based USB LCD backpacks. Check out the design on the wiki, and follow development in the forum.
A big box of boards came today. Here’s the PCBs for the FT232 inexpensive programmer and the Bus Blaster JTAG programmer. The first draft of these boards are white.
This is the mini version of the USB LCD backpack . It has only the IO pins required for the most common HD44780 LCD pinouts. Join the development discussion in the forum. Driver development is under way for LCDsmartie. We’ll be adding support to LCDproc too.
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 […]
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 […]