3KU Capacitive Sensor Upgrade
thingiverse
Some quick info on adding a capacitive sensor to a 3KU K3000 3D printer. In order to use the probe, a small amp circuit is required. This circuit boosts the 5V RAMPS signal to 9 volts and amplifies the probe sense signal up to approximately 4.6 volts. Soldering this up on a proto board is relatively straightforward. If there's interest in professional PCBs, let me know and I'll make a small run. Component List: Probe: https://www.amazon.com/gp/product/B06Y4MCSQY Step-up Converter: https://www.aliexpress.com/item/1pcs-MT3608-2A-Max-DC-DC-Step-Up-Power-Module-Booster-Power-Module-For-Arduino/32612743227.html LM358 Op-Amp: https://www.aliexpress.com/item/Free-shipping-10pcs-LM358-LOW-POWER-DUAL-OPERATIONAL-AMPLIFIERS-LM358N-Amplifier-DIP8-LM358P-A030/32588849094.html I have created a listing on OpenBazaar for the PCB, a kit, or a fully assembled unit: Item: http://openbazaar.com/store/QmVFRGwApdcef56Be7FPXnXQaB79rYrve3otFsrWvSwbAu/3ku-capacitive-sensor-apmplifier-board Store: http://openbazaar.com/store/QmVFRGwApdcef56Be7FPXnXQaB79rYvre3otFsrWvSwbAu
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