Re: [neonixie-l] Weird MAX1242 ADC behaviour

2010-10-12 Thread David Forbes
On 10/12/10 5:52 AM, Jens Boos wrote: Hello folks, I am currently building a digital voltmeter (3 x IN-14, 1 x IN-19A) using the 10 Bit ADC MAX1242 and the PIC16F627A as the controller. I would like to measure voltages up to 300V. Here is what I did: - Vref was conencted to the 5V logic supply

[neonixie-l] Weird MAX1242 ADC behaviour

2010-10-12 Thread Jens Boos
Hello folks, I am currently building a digital voltmeter (3 x IN-14, 1 x IN-19A) using the 10 Bit ADC MAX1242 and the PIC16F627A as the controller. I would like to measure voltages up to 300V. Here is what I did: - Vref was conencted to the 5V logic supply voltage, buffered with 2.2uF and 100nF.