Unterschiede

Hier werden die Unterschiede zwischen zwei Versionen angezeigt.

--- uln-power-supply [2016/02/11 17:49] – angelegt karl
+++ uln-power-supply [2017/04/04 06:45] (aktuell) – [OSH-Park] karl
@@ Zeile 1: / Zeile 1: @@
 ====== 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.
+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
-{{  :uln-supply:3d-top.png?direct&300|}}
+e.g. with R1||R2 = 50kΩ, U_out = 5V
 ===== Schematic =====
@@ Zeile 15: / Zeile 20: @@
 ===== KiCad project =====
 {{:uln-supply:uln-power-supply-kicad.7z|}}
+===== OSH-Park =====
+You can directly order this PCB from oshpark.com
+<html>
+<a href="https://oshpark.com/shared_projects/uWxyBEL1"><img src="https://oshpark.com/assets/badge-5b7ec47045b78aef6eb9d83b3bac6b1920de805e9a0c227658eac6e19a045b9c.png" alt="Order from OSH Park"></img></a>
+</html>
+{{tag>english article product electronics noise technical}}