> Hello, > I recently got a 3D printing head with K type thermocouple off ebay. >
With a thermistor, I used a simple 555-timer circuit to convert temperature into a variable frequency: http://www.anderswallin.net/2010/11/temperature-control-circuits/ It's very nonlinear and not that precise, but for 3D printer bed or nozzle temperature control it works fine. No ADC or other circuits required, one parallel port pin reads temperature, another outputs PWM to the heater. Anders PS. for another project I am very much interested in real-time SPI-connected ADC into HAL, so keep us posted! ------------------------------------------------------------------------------ Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with <2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
