i got my latest batch of parts from RS earlier today, before I was forced to endure the weekly food shop, and I've just got around to unpacking it. Most if it was some unexciting resistors, caps, RIRO op-amps and some tiny, tiny 10k NTC thermistors that are slim enough to sit on a board underneath an OCXO.
I've been doing the GPSDO fiddling so far with a stock STM32F411 Nucleo development board. One of the nice things about the STM32 dev boards is, aside from being really cheap, that they come with an ST-LINK debugger built in. Now, when I finally get around to spinning up my own board I'm going to need to attach a debugger to it. ST have recently introduced a newer standalone version of the ST-LINK, the STLINK-V3MINI and I decided to grab one of these in the same order. At only £8 it wasn't a hard decision to make and they come with a lead with 1mm pitch header sockets each end, making for a low-board-area solution on the target board.
Man these boards are
small. Here it is with a TO-220 LM317 for scale:
![](https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/?action=dlattach;attach=1224346;image)
Edit: Got the connector pitch wrong, it's 1.27mm (
i.e. \$\frac{1}{20}\$ inch). The mating connector that goes on the target board is a Samtec FTSH-107-01-F-DV-K in case anyone needs to know.