diff --git a/lambda/TODO b/lambda/TODO
index 2310783..9cb7a62 100644
--- a/lambda/TODO
+++ b/lambda/TODO
@@ -13,4 +13,5 @@
 * Circuit
 - Look at oxygen sensor voltage with voltmeter/oscilloscope - is the voltage
   really so unstable?
-- Verify ADC voltages against voltmeter with other uC (ADC_OFFSET_MV)
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+- Verify ADC voltages against voltmeter with other uC (ADC_OFFSET_MV)
+- Put button and beeper pins in pins.h (watch out with OCR1A)
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