Universal Dual Op-Amp Development PCB & Schematic

Universal Dual Op-Amp Development PCB & Schematic







Universal Dual Op-Amplifier Development PCB THT Board


Universal Dual Op-Amplifier Development PCB THT Board


Universal Dual Op-Amplifier Development PCB SMD 


Universal Dual Op-Amplifier Development PCB SMD 


Universal   Deferential Amplifier Development Board


Universal Dual Op-Amplifier Development Compact PCB


Universal Dual Op-Amplifier Development PCB THT Board with Prototype Area

Introducing the AxiDraw V3

We are pleased to introduce the AxiDraw V3, a new generation of our flagship writing and drawing machine.

This new AxiDraw has been redesigned from the ground up for high performance. It features smooth rolling wheels on custom aluminum extrusions, specially designed for high stiffness and light weight. Its sturdy, rigid construction gives it finer quality output and in most applications allows it to operate at up to twice the speed of the previous AxiDraw, which it replaces.

As with the previous version, AxiDraw is a simple, modern, precise, and versatile pen plotter, capable of writing or drawing on almost any flat surface. It can write with fountain pens, permanent markers, and other writing implements to handle an endless variety of applications. Its unique design features a writing head that extends beyond the body of the machine, making it possible to draw on objects bigger than the machine itself.

Solderless DIY Multiple Hobby Project Kit Using 555 Timer & OP-Amp

Solderless DIY Multiple Hobby Project Board build around 555 Timer & OP-Amp, Bord provided with Male header connectors for easy solder less connections using Female Header wire jumpers. On board diode for reverse supply connections , Slide switch for ON/OFF

Supply : 9V DC PP3 Battery

Inputs :   Magnetic Filed Sensor, LDR Light Sensor. NTC Temperature Sensor, Tilt Mercury Switch, Variable Resistor POT, Two Tactile Switch

Outputs : Speaker, Buzzer, White LED, Red LED







solder-less-diy-multiple-hobby-project-kit-using-555-timer-op-amp Circuit

solder-less-diy-multiple-hobby-project-kit-using-555-timer-op-amp Circuit



solder-less-diy-multiple-hobby-project-kit-using-555-timer-op-amp PCB

solder-less-diy-multiple-hobby-project-kit-using-555-timer-op-amp PCB

Possible Projects

  • Adjustable Timer with alarm
  • Adjustable Timer LED
  • Fix Timer Alarm
  • Fix Timer LED
  • RED LED Flasher
  • White LED Flasher
  • Warning Alarm
  • Metronome
  • Light Sensitive To LED Flasher
  • Light Sensitive Audio Sound Effects
  • Bird Sound
  • Tilt Alarm
  • Tilt LED
  • Adjustable Audio Frequency
  • Adjustable LED Flasher
  • LED Intensity Controller
  • DC Motor Speed Controller
  • Temperature Sensitive Alarm
  • Temperature Sensitive LED
  • Magnetic Filed to Audio Sound Effects
  • Magnetic Field To LED Flasher
  • LED ON/OFF with Tactile Switch
  • Red & White LED Flasher


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