Hello,
I need to monitor analog panel meters from a generator panel such as voltmeter and current meter (ammeter) that will be interfaced into uP. The voltage range is typically 0-250VAC and the current to be measured is within 5-600A range.
But the problem is I only have an ADC chip that accepts input voltage and current within 0-5V and 0-40mA respectively. These are standard output on most of analog devices.
Anyone who has an idea on how to convert an AC voltage ranging from 0-250V to 0-5VDC? I've tried to use a diode rectifier (bridge-type) followed by a voltage divider circuit to covert AC to DC and downgrade DC voltage into 5V. It work well but I still need alternative solutions. Especially in monitoring current, any idea on how to monitor and interface the current meter readings to uP?
Regards to all,
Howie
I need to monitor analog panel meters from a generator panel such as voltmeter and current meter (ammeter) that will be interfaced into uP. The voltage range is typically 0-250VAC and the current to be measured is within 5-600A range.
But the problem is I only have an ADC chip that accepts input voltage and current within 0-5V and 0-40mA respectively. These are standard output on most of analog devices.
Anyone who has an idea on how to convert an AC voltage ranging from 0-250V to 0-5VDC? I've tried to use a diode rectifier (bridge-type) followed by a voltage divider circuit to covert AC to DC and downgrade DC voltage into 5V. It work well but I still need alternative solutions. Especially in monitoring current, any idea on how to monitor and interface the current meter readings to uP?
Regards to all,
Howie