A beefier psu capable of at least 100mA is enclosed.Note use of a TLC2262 opampAllan
What psu are you using for these tests?The ardiuno 5v has a limited current capability if powered from an external higher voltage via vin...Allan
through a 7805 transistor
A 7805 is not a transistor it is a voltage regulator. You must use them with a capacitor on the input and the output.