Big Muff or others Tone Stack Daughter Board Add On
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Circuit Board Checker Circuit Diagram
This little circuit indicates the basic integrity of a printed board, detecting 0V, positive supply voltage from less than 3V to 30V and floating parts. If the probe is floating, as it would be in a broken track, then both LEDs barely light up, since there is no current to drive the transistors, but if the probe touches 0V or a positive voltage one or other lights. A digital signal should light them in proportion to the mark-space ratio whereas the output of a circuit oscillating at a frequency rate below about 20Hz will cause the LEDs to flicker alternatively. The LEDs will illuminate always at a constant intensity, no matter the voltage supply used, because they are fed by a very simple FET constant-current generator (Q1). Circuit diagram: Circuit Board Checker Circuit Diagram Parts: R1 = 22K R2 = 22K D1 = Red LED D2 = Green LED Q1 = BF245 Q2 = BC547 Q3 = BC557 Notes: The Black clip must be connected to the negative ground of the board under test. The Red clip should be connected to ...
Philips 40PFL4609 – Circuit Diagram – Digital main board
Scheamtic – Digital main board - Philips 40PFL4609 The order of pins shown in this diagram is different from that of actual IC3101. IC3101 is divided into seven and shown as IC3101 (1/7) ~ IC3101 (7/7) in this Digital Main Schematic Diagram Section. TYPE-A TYPE-B The order of pins shown in this diagram is different from that of actual IC3101. IC3101 is divided into four and shown as IC3101 (1/4) ~ IC3101 (4/4) in this Digital Main Schematic Diagram Section CONTROL PANEL CIRCUIT FOR BOTH TYPE See the circuit diagram of the SMPS board and other adjustment details =>> CLICK ON THE SCHEMATICS TO ZOOM IN
4 Channel Triac Board
Opto-Isolated 4-Channel Triac Board (R) is used for fast switching applications. Ideal for switching mains circuits, lights, appliances and small load. Each circuit is effectively isolated with opto-isolators on each channel, TTL inputs control each channel. Trigger input 2-12 VDC Mains supply input 230 VAC or 110 VAC Output 1 A @ 230 VAC (RMS ON STATE CURREN 4 AMPS EACH CHANNEL) Snubber circuit for inductive load Jumper for common cathode ground Box Header connector for connection of control signal Screw terminal connector for Load Four mounting holes of 3.2 mm each PCB dimensions 139 mm x 73 mm [ ]