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grbl homing using NC switches
grbl homing with NC switches can start out as something small but can become very tricky very fast. There are plenty of options within the firmware but getting a combination of settings right is critical. However with the correct wiring and right sequence of options in grbl can lead to flawless homing within minutes.
0-4A adjustable PWM/TTL Laser Driver
This is a laser driver based on Agastar’s original design usingSTMicroelectronics’ LED2001PHR high power LED driver. My design changes includes the use of more low-cost components, adds a optocoupler isolation for the PWM signal and the option to manually control the output current with a potentiometer.
Reflow Oven for SMD soldering
If you are tired of using a hot air gun or a soldering iron for SMD components, building a reflow oven should be next on your list. Its very inexpensive and there is plenty of electronics that would help you build it.