:56989599 And do you have any (1) Current sensor amplifier, eg MAX4172 https://electronics.stackexchange.com/questions/544378/current-mirror-real-life-examples/544445#544445 (2) UV light sensor: AliEXpress 2.7V-5.5V Uv Sensor Module
https://nl.aliexpress.com/item/4000479381883.html?spm=a2g0o.search0302.0.0.40585dc5V2oFQV&algo_pvid=7af1041d-5999-4d92-9c31-5ef7bd14188e&algo_expid=7af1041d-5999-4d92-9c31-5ef7bd14188e-8&btsid=0b0a555e16127724531018603efab8&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_, to do CCS negative feedback experiments?