Inside the Siglent SPD3303X Precision Programmable DC Lab Power Supply.
http://amzn.to/1m9Knp2
UPDATE: There is an even cheaper version, the SPD3303XE which has 10mV/10mA resolution.
http://amzn.to/1jNsQRL
Atten PSU teardown: • EEVblog #440 Atten PPS3205T3S Trip...
Rigol DP832 teardown: • EEVblog #511 Rigol DP832 Power Supp...
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