Maker Factory ELECTRONICS EXPERIMENTS BOX Manual page 278

Fig. 3.88: Circuit 88 – Constant current power
source with FET transistor
Fig. 3.90: Circuit 90 – Constant current power
source with bipolar transistor
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Fig. 3.89: Circuit 89 – Constant current power source with FET
transistor
Fig. 3.91: Circuit 91 – Constant current power source with bipolar
transistor