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STD Slow_turn on

License: Public Domain

Mode: Editors' pick

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Update time: 2023-04-09 16:54:44
Creation time: 2020-09-16 20:28:45
Description
Little helper PCB mainly for a tube heating supply to turn on via a NTC to limit current at startup. Tubes like ECF82 and others tend to light up bright at startup because of bad manufacturing so this helps to get more lifetime or prevent a total defect of these tubes. Can also be used for any other voltages that need to be limited or delayed at startup.
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ID Name Designator Footprint Quantity
1 1mF C1 E5-13 1
2 1N4007 D1,D2 DO-41_BD2.4-L4.7-P8.70-D0.9-RD 2
3 Testpad GND,OUT,SWITCH,DC|6 TESTPAD 4
4 G2R-2-DC5V K1 RELAY-TH_G2R-2-DC5V 1
5 LED-TH-3mm_R LED1,LED2 LED-TH_BD3.0_RED 2
6 BC547B Q1 TO-92-3_L4.9-W3.7-P1.27-L 1
7 BD139 Q2 TO-126_L7.5-W2.5-P2.3-B 1
8 100 R1 0207/10 1
9 1k R2,R5,R6 0207/10 3
10 220k~1Min. R3 0207/10 1
11 NTC R4 NTC 10D-15 1

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