Hello all.
I need to develop a battery charger for an in circuit 9 VDC battery.
Details:
The battery is constantly in use by the PCB it is attached to. The PCB has been designed to detect tampering in our system by means of mechanical switches. When the PCB loses power from the PC it is connected to, the PCB then looks to the battery to provide power for tamper detection.
The battery is currently a 9 VDC Lithium.
I have two possible power sources:
120 VAC, which can be adjusted to 9 VDC by use of a transformer.
12 VDC, which would have to adjusted through a PCB design.
Need:
For someone to help me design a circuit that would provide a stable electrical voltage / current to the battery and PCB but would prevent the battery from discharging when power is off to the PCB.
I look forward to seeing what comes up from this discussion.
I need to develop a battery charger for an in circuit 9 VDC battery.
Details:
The battery is constantly in use by the PCB it is attached to. The PCB has been designed to detect tampering in our system by means of mechanical switches. When the PCB loses power from the PC it is connected to, the PCB then looks to the battery to provide power for tamper detection.
The battery is currently a 9 VDC Lithium.
I have two possible power sources:
120 VAC, which can be adjusted to 9 VDC by use of a transformer.
12 VDC, which would have to adjusted through a PCB design.
Need:
For someone to help me design a circuit that would provide a stable electrical voltage / current to the battery and PCB but would prevent the battery from discharging when power is off to the PCB.
I look forward to seeing what comes up from this discussion.