diff --git a/nrf5/adc.c b/nrf5/adc.c
index 79c8bc7104..35fb9fa4bb 100644
--- a/nrf5/adc.c
+++ b/nrf5/adc.c
@@ -40,21 +40,98 @@ typedef struct _machine_adc_obj_t {
     ADC_HandleTypeDef *adc;
 } machine_adc_obj_t;
 
+/// \method __str__()
+/// Return a string describing the ADC object.
+STATIC void machine_adc_print(const mp_print_t *print, mp_obj_t o, mp_print_kind_t kind) {
+    machine_adc_obj_t *self = o;
+
+    (void)self;
+
+    mp_printf(print, "ADC()");
+}
+
 /******************************************************************************/
 /* MicroPython bindings for machine API                                       */
 
+// for make_new
+enum {
+    ARG_NEW_PIN,
+};
+
 STATIC mp_obj_t machine_adc_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
+    static const mp_arg_t allowed_args[] = {
+        { ARG_NEW_PIN,  MP_ARG_REQUIRED | MP_ARG_INT },
+    };
+
+    // parse args
+    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+    mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
+
+    machine_adc_obj_t *s = m_new_obj(machine_adc_obj_t);
+    s->base.type = type;
+
+    mp_int_t channel_num;
+
+    if (args[ARG_NEW_PIN].u_int > 0) {
+        channel_num = args[ARG_NEW_PIN].u_int;
+    } else {
+        nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError,
+                                                "Channel number not set"));
+    }
+
+    s->adc->init.channel = channel_num;
+
+    hal_adc_init(ADC_BASE, &s->adc->init);
+
+    return MP_OBJ_FROM_PTR(s);
+}
+
+/// \method init()
+mp_obj_t machine_adc_init(mp_obj_t self_in) {
+    hal_adc_start(ADC_BASE);
     return mp_const_none;
 }
+STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_machine_adc_init_obj, machine_adc_init);
+
+/// \method deinit()
+mp_obj_t machine_adc_deinit(mp_obj_t self_in) {
+    hal_adc_stop(ADC_BASE);
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_machine_adc_deinit_obj, machine_adc_deinit);
+
+/// \method value()
+/// Read adc level.
+mp_obj_t machine_adc_value(mp_obj_t self_in) {
+    return MP_OBJ_NEW_SMALL_INT(hal_adc_value(ADC_BASE));
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_machine_adc_value_obj, machine_adc_value);
+
+/// \method battery_level()
+/// Get battery level in percentage.
+mp_obj_t machine_adc_battery_level(void) {
+    return MP_OBJ_NEW_SMALL_INT(hal_adc_battery_level(ADC_BASE));
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_0(mp_machine_adc_battery_level_obj, machine_adc_battery_level);
+
+STATIC const mp_map_elem_t machine_adc_locals_dict_table[] = {
+    // instance methods
+    { MP_OBJ_NEW_QSTR(MP_QSTR_init), (mp_obj_t)&mp_machine_adc_init_obj },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_deinit), (mp_obj_t)&mp_machine_adc_deinit_obj },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_value), (mp_obj_t)&mp_machine_adc_value_obj },
+
+    // class methods
+    { MP_OBJ_NEW_QSTR(MP_QSTR_battery_level), (mp_obj_t)&mp_machine_adc_battery_level_obj },
+};
+
+STATIC MP_DEFINE_CONST_DICT(machine_adc_locals_dict, machine_adc_locals_dict_table);
 
 const mp_obj_type_t machine_adc_type = {
     { &mp_type_type },
     .name = MP_QSTR_ADC,
     .make_new = machine_adc_make_new,
-#if 0
-    .print = adc_print,
-    .locals_dict = (mp_obj_t)&machine_adc_locals_dict
-#endif
+    .locals_dict = (mp_obj_t)&machine_adc_locals_dict,
+    .print = machine_adc_print,
 };
 
 #endif // MICROPY_PY_MACHINE_ADC