Since I introduced the JeonLab mini v1.0, I thought I could make it smaller and breadboard friendly. So I designed a new version.
This is yet another minimalist Arduino compatible board which means there are only core components: ATmega328p with Arduino bootloader, resistors for the reset pins and LEDs (power and d13), and a capacitor for auto-reset when you upload your sketch through external FTDI interface.
I found there is enough space for resistors or capacitors between the PCB bottom and the breadboard because of the height of the header plastic part. So I arranged those 3 resistors and a capacitor at the bottom layer so that only ATmega328p, ceramic resonator, and 2 LEDs can be compactly arranged on the top layer. This fits very well on a mini breadboard.
More detail and examples will be posted on my blog.