Password Code Combination Keypad Button Matrix Soldering Kit DIY

Features:

• Password Code Combination Keypad Button Matrix Soldering Kit DIY
• This button matrix has a preset 4 digit passcode
• If you input the correct code, the red indicator will light up
• Soldering kit for practicing soldering techniques
• Default Password: 1479
• Unlocking Instructions:

• • press S1 (U1A Q=1)
  • press S4 (U1B Q=1)
  • press S7 (U2A Q=1)
  • press S9(U2B Q=1)
  • When the correct code 1479 is entered indicator lamp LED1 will be on meaning the input password is correct.
  • When the password is correct, U2B chip values are Q=0,U3 Y=1, making the first three triggers all clear; if you want to clear U2B and turn indicator lamp LED1 off press S8 to reset.
• Contents:
  • 2x IC CD4013
  • 1x IC CD4011
  • 6x SMD Resistor 10K ohm
  • 1x Resistor 10K ohm
  • 1x Resistor 510 ohm
  • 1x Electrolytic Capacitor 10uF
  • 1x LED 5mm Red
  • 10x Tactile Button 6*6mm

  • 1x PCB