Finding LCD 16x2 Module


Here are the components to add for your relay driver circuit:

Table


Part NameManufacturer Part NumberQuantityFootprintDatasheetManufacturer
2N2222A2N2222A1TO-92@______
1N40011N40011DO-41@______
Resistor 10 kΩ 5 %10 kΩ Resistor10603______
Let me know if you’d like me to wire them up for your relay control!
  • Added 1x 2N2222A as Q1
  • Added 1x 1N4001 - 8363396 as D8
  • Added 1x Generic Resistor as R1
now connect all of them together
Here are the net connections for the relay driver circuit:

Table


NetConnections
RELAY_CTRLU1:GPIO4, R1:1, Q1:Base
RELAY_COIL+K1:Coil+, D8:Cathode
RELAY_COIL-K1:Coil–, Q1:Collector, D8:Anode
GNDU1:GND, Q1:Emitter
Let me know if you’d like to apply these changes.
  • Connected U1:D4 to R1:P1
  • Connected R1:P1 to Q1:B
  • Connected K1:Coil-1 to D8:K
  • Connected K1:Coil-2 to Q1:C
  • Connected Q1:C to D8:A
  • Connected U1:GND to Q1:E

Schematic of smart water meter
U2
U1
U3
Q1
sublayout1
R1
Resistance
500 Ω
K1
U4
Not Recommended for New Designs
D8

smart water meter

smart water meter thumbnail