All-in-one USB to isolated-UARTx2/CAN/USB/RS485/RS232 converter

Mar 25, 2021

Project update 7 of 11

Production Status

by Ali Slim

This update is somewhat overdue, but I’m happy to report that manufacturing is underway. Components sourcing proved to be very challenging and lead times were more than anticipated. Finally I managed to source all components, the most challenging was the STM32F04 MCU. ST microcontrollers are like gold nuggets these days, hard to come by and very very expensive, some $2 parts are going for $15+ which is insane! Fortunately I bought enough stock for this batch and a future smaller batch, after that I plan to move away from ST.

There is another minor design change I had to make. The slide switch actuator length will be 2 mm longer than originally planned. It’s the same high quality switch from the same manufacturer Alps Alpine (picture below). The lead time for the shorter version was too long and I couldn’t risk further delays. Actually I will keep this change in the future batches, the switch is much easier to toggle, looks and makes a great fidget!

What’s next?

Next week I will receive samples of the first batch. Usually I prefer to get samples before making a big manufacturing run to make sure all sourced components are up to spec and there’s no assembly or soldering issues. After that I will greenlight the full batch assembly which should take about one week, and another week for testing and programming. So I expect two or three weeks delay to the current April delivery date unless there is an unexpected issue. I will follow up with another update in the coming weeks.

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