FHP12A case mod with Li-ion
thingiverse
A fried of mine got handed an FHP12A mini optical power meter with a broken case and he wanted to 3d print a case for it and have it with a litium battery. No sure how the step down pwm frequency effects the accuracy. Battery: 603040 or smaller https://www.aliexpress.com/item/33039668102.html?srcSns=sns_Copy&spreadType=socialShare&bizType=ProductDetail&social_params=20544009231&tt=MG&aff_platform=default&shareId=20544009231&businessType=ProductDetail&platform=AE&afSmartRedirect=y&gatewayAdapt=4itemAdapt usb c charge module: https://www.aliexpress.com/item/1005003585993852.html?srcSns=sns_Copy&spreadType=socialShare&bizType=ProductDetail&social_params=20544853409&tt=MG&aff_platform=default&shareId=20544853409&businessType=ProductDetail&platform=AE&afSmartRedirect=y on/off switch: SS12D00 with 4mm shaft https://www.aliexpress.com/item/4001207529493.html?srcSns=sns_Copy&spreadType=socialShare&bizType=ProductDetail&social_params=20544850336&tt=MG&aff_platform=default&shareId=20544850336&businessType=ProductDetail&platform=AE&afSmartRedirect=y Step down: 3.3V should be ok (3V recommended) https://www.aliexpress.com/item/1005003880321464.html?srcSns=sns_Copy&spreadType=socialShare&bizType=ProductDetail&social_params=20544848689&tt=MG&aff_platform=default&shareId=20544848689&businessType=ProductDetail&platform=AE&afSmartRedirect=y
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