On pg. 18 Figure 5 of this data sheet you will see a pulse train required to program the sensitivity of the A1362 Hall-Effect sensor.
I am using the following circuit:
Using Figure 5 from the data sheet, I simply power on the Hall-Effect sensor by supplying the 5V VCC. Switches SW8,9,and 10 start out being in open state. Here are my steps:
- Close SW8 // high pulse
Close SW9 // mid pulse
Close SW8 // high pulse
Close SW9 // stream of mid pulses, each time incrementing sensitivity counter by 1
- Open SW9
repeat steps 7,8 0 - 255 times as necessary to set the sensitivity of hall-effect sensor.
When I bring the north / south pole sides of a magnet close to the hall-effect sensor, the voltage readings I get at the VOUT pin are almost identical. But if the sensitivity of the hall-effect sensor has changed I should get different voltage readings. This means I am not setting the sensitivity correctly. What am I missing?
From previous posts, others have said to watch out for my current readings too. So here is some more information:
At VpH the multimeter reads ~ 200mA At VpM the multimeter reads ~ 100mA At VpL the multimeter reads ~ 3.5mA