diff --git a/src/channels.rs b/src/channels.rs
index f32a939..e230f0a 100644
--- a/src/channels.rs
+++ b/src/channels.rs
@@ -24,7 +24,7 @@ use crate::{
 };
 
 pub const CHANNELS: usize = 2;
-pub const R_SENSE: f64 = 0.05;
+const R_SENSE: f64 = 0.05;
 // DAC chip outputs 0-5v, which is then passed through a resistor dividor to provide 0-3v range
 const DAC_OUT_V_MAX: f64 = 3.0;
 
@@ -35,7 +35,7 @@ pub struct Channels<'a> {
     pub adc: ad7172::Adc<pins::AdcSpi, pins::AdcNss>,
     /// stm32f4 integrated adc
     pins_adc: pins::PinsAdc,
-    pub pwm: pins::PwmPins,
+    pwm: pins::PwmPins,
     hwrev: &'a hw_rev::HWRev,
 }