How does each miner know when to create a block?

I have been trying to understand the protocol and reading related documents, there is a point where i get stuck.

As far as i understand (correct me if not), when a transaction occurs, it is broadcast to the network and some miners receive it. When a certain number of transactions are reached, they are packed in a block and hash race begins.

What i fail to understand is; in this scheme, don’t all the miners have to be in perfect memory coherence and time sync, so that they know when a block is to be sealed and start to iterate for hashes? Or do they not need to mine and hash the same global block, but have separate blocks which are later validated by other miners and interblock transaction collisions don’t matter?

I know i misunderstand a very basic point in the protocol, but i can’t figure what.

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Bitcoin price continues higher after Craig Wright has excused himself from the ecosystem. Bullish sentiment is riding high toward the advance pivot at $ 470. This analysis is provided by xbt.social with a 3-hour delay. Read the full analysis here. Not a member? Join now and receive a $ 29 discount using the code CCN29. Bitcoin Price […]

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raspberry pi bitcoin mining, NOT USB, running external Graphics cards or Blade miners?

so there is alot of information on the web for running USB bitcoin mines with raspberry pi & powered USB hubs.

BUT USB miners are expensive!

asic blade cards, like used in antminers/dragons or graphics cards are much cheaper and can be brought form bulk out of china. my question, can we make raspberry pi control asic miners other than USB?

would be via a break out board of some sort?

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