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Topic: 4809 experimenters board (Read 43 times) previous topic - next topic


Feb 24, 2021, 07:13 pm Last Edit: Feb 24, 2021, 07:25 pm by hammy

I've made a board for the 40pin DIP version of the 4809 processor , really to make it easier to develop stuff  rather than using proto boards.
Features are :
* 5v 7805 regulator
* 3v3 regulator
*  2 pots to create analog inputs
* 4 LEDs for digital outputs
* two types of clock circuits for external clock
* 4 push buttons for digital
* MAX232 interface .
* RC filter stage
* two potential dividers
* two Open collector drivers
* various 5v/0v connections bought out
* all pins bought out labelled with ports and Arduino numbers to align with Mighty CoreX
* serial interface with reset capacitor for programming via Tx/Rx
* 1 pin program connection.
* free areas
* pull up and pull down resistors

I had to get ten of these made , would anyone want to buy bare boards?

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