====== Ultra Low Noise Linear Power Supply, using LT3042 ====== {{ :uln-supply:3d-top.png?direct&300|}} Small power regulator PCB, with AC inputs and DC output. * 78xx as a pre-regulator, to reduce power loss on the LT3042 and to increase the max. input voltage * Output voltage: 0-15V * Output current: max. 200mA * Input voltage: max. 20VAC ===== Setting the Voltage ===== The LT3042 has a very nice way to set the output voltage. Instead of using an internal voltage reference and an external voltage devider, a constant current is driven through a user settable resistance, which is then the reference voltage! U_out = 100uA * R1||R2 e.g. with R1||R2 = 50kΩ, U_out = 5V ===== Schematic ===== {{:uln-supply:rauscharmes-netzteil-5v.pdf|}} ===== KiCad project ===== {{:uln-supply:uln-power-supply-kicad.7z|}} ===== OSH-Park ===== You can directly order this PCB from oshpark.com