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Posts tagged DC

Variable Power Supplies

Variable Power Supplies circuit using 2N3906, LM317, LM337, LM324, MJ2955, 7805, 2N3055, 2N3905 Parts: P1_500R P2_10K R1,R2_2K2 R3_330R R4_150R R5_1R C1_3300µF C2_1µF D1,D2_1N5402 D3_5mm Q1_BC182 Q2_BD139 Q3_BC212 Q4 _2N3055 T1_220V Primary, This Variable Power Supplies circuit has a current limit feature, in case there is a short circuit or other problem places. Here’s a circuit […]

Motor Control

Electric Motor circuit Motor Control circuit board

PC Serial Port Circuit

PC Serial Port Circuit PC serial port circuit to RS-232 pin out and cable

2 tr preamp mic schematic

2 tr preamp mic schematic using C536, C458 R1,7 …… 2K2 R2 …….. 47K R3 …….. 270 R4 …….. 2M2 R5 …….. 180K R6 …….. 470K R8 …….. 15K R9 …….. 150K C1 …….. 22uF/16V C2 …….. 200nF C3 …….. 10uF/16V Q1 …….. C694 / C458 Q2 …….. C536 / C458 VR …….. 50K

quiet voice problem circuit Diagram

quiet voice problem circuit Diagram

Circuit diagram LM1881 video sync for tv and lcd monitor separator, a 74HC4066 as a simple analog switch

The chips include an ATmega88 as the main controller, an AD9280 ADC, an LM6134 high-speed quad op-amp, an LM1881 video sync separator, a 74HC4066 as a simple analog switch, and an RS-232-level converter. LM1881 Video sync separator extracts timing information including composite and vertical sync, burst/back porch timing, and odd/even field information from standard negative […]

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