From a072527fee099b3932246a5e13fbe8f8e4786a41 Mon Sep 17 00:00:00 2001 From: bondus Date: Wed, 25 Mar 2020 16:53:41 +0100 Subject: [PATCH] Update README.md --- README.md | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/README.md b/README.md index 55a032d..0b20c89 100644 --- a/README.md +++ b/README.md @@ -7,12 +7,19 @@ Features: * Two MOSFET drivers fans * One big MOSFET driver for a hotend heater * Thermistor input -* Servo connector +* One servo +* One endstop -It should be fed from the mainboard with 12-24V, 3.3V or 5V, GND, UART RX and UART TX. +It should be fed from the mainboard with 12-24V, 5V, GND, UART RX and UART TX. Possible issues: * Is the cooling for the TMC2209 adequate? * How well will the UART cmos/ttl level survive? Noise? * Does it work + +Alternative design options: +* Use an ARM instead? STM32F030 +* Create a local 5V/3.3V instead? Switch regulator + LDO. Only the servo needs 5V +* USB-c would be neat, it could provide all the power and signalling needed +