Testing the Shinyei PPD42NS

From the comments on our Arduino dust sensor post,  KH writes: The sensor can obviously measure dust concentrations, it also has to be placed and set up properly, and it gives useful readings. For hobby users like most of us, obviously calibration to specific or absolute standards will be almost impossible. More details at Darell […]

Testing the new reduced-sized ICSP connector

This week we received a batch of PCBs and amongst them was the latest revision of our USB TFT breakoutboard. This board is the first board that features a new ICSP footprint, which occupies less space on the PCB and should improve testing and programming times at Seeed.

Dangerous DSO part 5: Testing and conclusions

It’s the last day of our week-long Dangerous DSO adventure. Yesterday we simulated the analog front-end and found a few changes to test. First, we’re going to increase the ADC buffer gain to 2. That should make vertical offset adjustment easier. Second, we’re going to try a more refined input range divider with a 900K […]

Bus Pirate v4 hardware self-test

Bus Pirate v4 just passed the hardware self-test. A test firmware will be available soon. So far we’ve implemented: USB connection Main IO pins Hardware I2C On-board EEPROM, with I2C edit mode v4 hardware self-test Function button Extra axillary pins New LEDs Next we’re going to address a bug in the pull-up voltage select circuit. […]

Bus Pirate v4 firmware alpha – alive!

Bus Pirate v4 is alive! Bus Pirate firmware v5.9 is running on the new Bus Pirate v4 hardware with direct PIC-based USB connection. It started out slow because USB support is hacked into replacements for the existing serial port functions, but the latest SVN version is working great. BPv4 doesn’t pass the self-test yet, but […]