diff --git a/config/example-extras.cfg b/config/example-extras.cfg
index 14ea6391..5451eac5 100644
--- a/config/example-extras.cfg
+++ b/config/example-extras.cfg
@@ -778,6 +778,31 @@
 #   default is to not scale the 'channel_x' parameters.
 
 
+# Statically configured MCP4018 digipot connected via two gpio "bit
+# banging" pins (one may define any number of sections with an
+# "mcp4018" prefix).
+#[mcp4018 my_digipot]
+#scl_pin:
+#   The SCL "clock" pin. This parameter must be provided.
+#sda_pin:
+#   The SDA "data" pin. This parameter must be provided.
+#wiper:
+#   The value to statically set the given MCP4018 "wiper" to. This is
+#   typically set to a number between 0.0 and 1.0 with 1.0 being the
+#   highest resistance and 0.0 being the lowest resistance. However,
+#   the range may be changed with the 'scale' parameter (see
+#   below). This parameter must be provided.
+#scale:
+#   This parameter can be used to alter how the 'wiper' parameter is
+#   interpreted. If provided, then the 'wiper' parameter should be
+#   between 0.0 and 'scale'. This may be useful when the MCP4018 is
+#   used to set stepper voltage references. The 'scale' can be set to
+#   the equivalent stepper amperage if the MCP4018 is at its highest
+#   resistance, and then the 'wiper' parameter can be specified using
+#   the desired amperage value for the stepper. The default is to not
+#   scale the 'wiper' parameter.
+
+
 # Configure an SX1509 I2C to GPIO expander. Due to the delay incurred
 # by I2C communication you should NOT use SX1509 pins as stepper enable,
 # step or dir pins or any other pin that requires fast bit-banging. They
diff --git a/docs/Features.md b/docs/Features.md
index 9249f612..43a0cf89 100755
--- a/docs/Features.md
+++ b/docs/Features.md
@@ -95,7 +95,7 @@ Klipper supports many standard 3d printer features:
 * Support for run-time configuration of TMC2130, TMC2208, TMC2224, and
   TMC2660 stepper motor drivers. There is also support for current
   control of traditional stepper drivers via AD5206, MCP4451, MCP4728,
-  and PWM pins.
+  MCP4018, and PWM pins.
 
 * Support for common LCD displays attached directly to the printer. A
   default menu is also available.
diff --git a/klippy/extras/mcp4018.py b/klippy/extras/mcp4018.py
new file mode 100644
index 00000000..f53024b9
--- /dev/null
+++ b/klippy/extras/mcp4018.py
@@ -0,0 +1,81 @@
+# MCP4018 digipot support (via bit-banging)
+#
+# Copyright (C) 2019  Kevin O'Connor <kevin@koconnor.net>
+#
+# This file may be distributed under the terms of the GNU GPLv3 license.
+
+class SoftwareI2C:
+    def __init__(self, config, addr):
+        self.addr = addr << 1
+        self.update_pin_cmd = None
+        # Lookup pins
+        ppins = config.get_printer().lookup_object('pins')
+        scl_pin = config.get('scl_pin')
+        scl_params = ppins.lookup_pin(scl_pin, share_type='sw_scl')
+        self.mcu = scl_params['chip']
+        self.scl_pin = scl_params['pin']
+        self.scl_main = scl_params.get('class')
+        if self.scl_main is None:
+            self.scl_main = scl_params['class'] = self
+            self.scl_oid = self.mcu.create_oid()
+            self.cmd_queue = self.mcu.alloc_command_queue()
+            self.mcu.register_config_callback(self.build_config)
+        else:
+            self.scl_oid = self.scl_main.scl_oid
+            self.cmd_queue = self.scl_main.cmd_queue
+        sda_params = ppins.lookup_pin(config.get('sda_pin'))
+        self.sda_oid = self.mcu.create_oid()
+        if sda_params['chip'] != self.mcu:
+            raise ppins.error("%s: scl_pin and sda_pin must be on same mcu" % (
+                config.get_name(),))
+        self.mcu.add_config_cmd("config_digital_out oid=%d pin=%s"
+                                " value=%d default_value=%d max_duration=%d" % (
+                                    self.sda_oid, sda_params['pin'], 1, 1, 0))
+    def build_config(self):
+        self.mcu.add_config_cmd("config_digital_out oid=%d pin=%s value=%d"
+                                " default_value=%d max_duration=%d" % (
+                                    self.scl_oid, self.scl_pin, 1, 1, 0))
+        self.update_pin_cmd = self.mcu.lookup_command(
+            "update_digital_out oid=%c value=%c", cq=self.cmd_queue)
+    def i2c_write(self, msg):
+        msg = [self.addr] + msg
+        send = self.scl_main.update_pin_cmd.send
+        # Send ack
+        send([self.sda_oid, 0])
+        send([self.scl_oid, 0])
+        # Send bytes
+        sda_last = 0
+        for data in msg:
+            # Transmit 8 data bits
+            for i in range(8):
+                sda_next = not not (data & (0x80 >> i))
+                if sda_last != sda_next:
+                    sda_last = sda_next
+                    send([self.sda_oid, sda_last])
+                send([self.scl_oid, 1])
+                send([self.scl_oid, 0])
+            # Transmit clock for ack
+            send([self.scl_oid, 1])
+            send([self.scl_oid, 0])
+        # Send stop
+        if sda_last:
+            send([self.sda_oid, 0])
+        send([self.scl_oid, 1])
+        send([self.sda_oid, 1])
+
+class mcp4018:
+    def __init__(self, config):
+        self.i2c = SoftwareI2C(config, 0x2f)
+        self.scale = config.getfloat('scale', 1., above=0.)
+        self.start_value = config.getfloat('wiper',
+                                           minval=0., maxval=self.scale)
+        config.get_printer().register_event_handler("klippy:connect",
+                                                    self.handle_connect)
+    def handle_connect(self):
+        self.set_dac(self.start_value)
+    def set_dac(self, value):
+        val = int(value * 127. / self.scale + .5)
+        self.i2c.i2c_write([val])
+
+def load_config_prefix(config):
+    return mcp4018(config)