diff --git a/firmware/src/main.rs b/firmware/src/main.rs
index ae3d171..beebf85 100644
--- a/firmware/src/main.rs
+++ b/firmware/src/main.rs
@@ -127,8 +127,8 @@ fn main() -> ! {
     writeln!(stdout, "tecpak boot").unwrap();
     board::init();
     writeln!(stdout, "board initialized").unwrap();
-    let mut tec0 = Tec::tec0();
-    let mut tec1 = Tec::tec1();
+    let mut tec0 = Tec::tec0().setup(PWM_PID_WIDTH);
+    let mut tec1 = Tec::tec1().setup(PWM_PID_WIDTH);
 
     println!(r#"
   _                         _
diff --git a/firmware/src/tec.rs b/firmware/src/tec.rs
index 95219e7..85813c7 100644
--- a/firmware/src/tec.rs
+++ b/firmware/src/tec.rs
@@ -60,6 +60,13 @@ impl Tec<pwm::T4CCP0, pwm::T4CCP1, pwm::T5CCP0, pwm::T5CCP1> {
 
 
 impl<MaxIPos: PwmChannel, MaxINeg: PwmChannel, ISet: PwmChannel, MaxV: PwmChannel> Tec<MaxIPos, MaxINeg, ISet, MaxV> {
+    pub fn setup(mut self, max: u16) -> Self {
+        self.max_i_pos.set(max, max);
+        self.max_i_neg.set(max, max);
+        self.max_v.set(max, max);
+        self
+    }
+
     pub fn get(&mut self, pin: TecPin) -> (u16, u16) {
         match pin {
             TecPin::MaxIPos =>