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.
Why not use wirewarap header type sockets with Rs & Cs mounted between the DIP legs so the assembly can be 3/10 wide instead of 5/10?
Got me curious as to if that would fit or not now.
CrossRoads:
Why not use wirewarap header type sockets with Rs & Cs mounted between the DIP legs so the assembly can be 3/10 wide instead of 5/10?
Got me curious as to if that would fit or not now.
That (wire-wrap DIP socket with long legs) was first thing came to my mind when I designed this, but they were quite expensive (the cheapest one I could find from Digikey was over $5.00). I wanted to make it inexpensive and ended up with this design. If you want 3/10, there is so called one-chip Arduino I remember.
I was thinking of the pins that I found at MarcoSpecialties, and also Gravitech.us (shorter legs).
Something like $1.90 for 20 pins, or maybe 32. I have used a lot of them as sockets for promini's with "interconnect" pins added as the promini leads (also from gravitech.us).
One-chip Arduino - the Solarbotic Ardweeny, with the components mounted on a board installed on the chips back.