An Arduino ISP connector is used, among others, for burning a bootloader and for programming ATtiny chips. When the ISP connector is only used once for programming, and than never again, it would be more convenient not to use a connector. Therefore, I created the connectorless 1x6 mini ISP connector and the mini 1x6 ISP adapter. By the zigzag positions of the PCB holes, the male ISP connector pins press against the holes and make electrical contact, and so no PCB connector is needed.

Step 1: Zigzag Holes

The construction is simple: By the zigzag positions of the PCB holes, the male connector pins press against the holes and make electrical contact. The connector is self-clamping. The idea is inspired by the Sparkfun 1X06_LOCK Eagle footprint.

Step 2: Advantages

No Pogo pins needed
In contrast to the Pogo adapter, the connector remains plugged in without any help
The construction is simple
Small footprint since the pitch is 1.27mm
Zero ISP connector cost

Step 3: Mini 1x6 ISP Adapter

With the mini 1x6 ISP adapter we can connect the zigzag ISP connector. The connector pins are thin and are suitable for the Eagle footprint. It is made compatible with the connector of the programmer USBasp.