Cut Phone Line Detector

This cut phone line detector circuit is used to detect whether your phone line is active or not. Components List: R1,R2,R3 = 22M Ohms R4 = 2.2M Ohms C1 = 0.47uF/250V Mylar caps D1 = 1N914, NTE519, or other small signal diode Q1 = 2N3904, NTE123AP Q2 = 2N3906, NTE159 Q3 = IRF510, NTE2382,  MosFet

4 Transistor FM Tracking Transmitter

The following diagram is the FM tracking transmitter based on 4 transistors. No additional notes for this tracking transmitter diagram, try to discover this circuit by yourself.. 🙂 Components list: R1 = 100K Ohms R2 = 10 Ohms R3 = 47K Ohms R4 = 220 Ohms C1 = 4.7uF/16V C2, C5 = 1nF C3 =… Read More »

Easy FM Tracking Transmitter

This is an easy FM tracking transmitter circuit project :). The scheme designed by Tony van Roon, and here the FM transmitter tracker diagram: Components List: R1 = 10K C1 = 100uF/10V C2 = 10nF C3 = 4-40pF trimmer capacitor C4 = 4.7pF IC1 = LM3909 Q1 = 2N3904 NPN transistor LED1 = Red LED/or… Read More »

Tube Head Pre-amp

This is a simple and low cost Tube Head Vacuum Tube pre-amp circuit designed bu PAiA electronics: Vcc – Pin 1 IC1 +12v – Pin 8 IC2, IC3, IC4 -12v – Pin 4 IC2, IC3, IC4 Ground – Pin 8 IC1 IC1 – 4049 CMOS Hex Inverting Buffer IC2, 3, 4 – 5532 Dual Low-Noise… Read More »

Touch Alarm System

Touch alarm circuit is widely used for security, which is installed on the door. The advantages of this alarm is because the cost is cheap and difficult to detect by burglars / intruders. The following is an example of a touch of alarm circuit which is designed by Tony Van Roon. Components List: R1 =… Read More »

Orange 125MK3 Guitar Mods

This document contains schematic diagram of Orange 125MK3 including the guitar preamp section, feedback and power amplifier section. Preview:

100W Inverter 12VDC to 220VAC

The following diagram is an inverter circuit which will give you 220V AC 50Hz with maximum power output of 100W. This inverter built using transistors for both the square wave generator module and the amplifier module. Inverter Diagram: The Q1 and Q2 used generate square wave. Q5-Q8 amplify the signal and the transformer to increase… Read More »

Solid State Relay

This is the circuit diagram of solid state relay. In reality, it is not a relay after all. There’s no ‘relay’ found, just the electronics circuit which does the switching. It operates a similar way as a relay; it is possible to use a low voltage to switch a higher voltage or better than ordinary… Read More »


Page 30 of 58« First...1020...2829303132...4050...Last »



POPULAR CIRCUIT TAGS:

1w amplifier 10W amplifier 20 watt 100w audio amplifier adjustable power supply Alarm alarm circuit amplifier amplifier circuit amplifier schematic am transmitter circuit audio amplifier audio circuit audio tone control Battery Charger dc power supply dc to ac inverter dc to ac inverter circuit diagram electronic siren emergency light circuit fm transmitter fm transmitter circuit fm transmitter circuit diagram fm transmitter diagram Inverter inverter circuit inverter circuit diagram ldr LED Flasher light sensor lm1875 mosfet amplifier power amplifier power amplifier circuit Power Supply pre amp preamplifier radio circuit regulated power supply rf circuit stepper motor driver tda2005 tone control circuit tone control schematic variable power supply konfenter 12V DC ke 9V DC, booster tv uhf schematic, automatic voice on & off circuits, c2570 transistor circuit, 6v inviyar sarkit, sound network circuit diagram, diagram of battery level indicator using bar pinterest, Active tone control circuit, www 4558 ic bass treble circit in, Frontach Jil 1854 2 0 spkar PCB in, intex 2 1 home theater circuit diagram, TDA 50 50W audio amplifier circuit, design FM at radius 500m, 3v to 12v converter circuit diagram, radio circuit diagrams for 484 chip, Stage moster amp, www 500w mosfet circuit com, 4558ic amp circuit, audio power amplifier circuit diagrams, 4141stk audeio bord