alt.tbo: the bipolar HV-pulser
What does it look like?
What is it supposed to do?
The aim of this echOmod is to get the HV Pulse done.
How does it work: block diagram
About the module
- Cheaper, more robust than tobo
- Less issues with the MD0100
- As of today (20180305), the damper still lacks
Constraint and limits
- First experiment jupyter notebook and first datasets
- Driver for raspberry pi
- More tests with fixed depth experiment (for pulse quality tests).
Testing with a fixed depth of water
Tests with 3 levels of HV (25, 50 and 75V) - unipolar
Details of pulses at 50V
- Needed to get 200ns wide square pulses, both in the positive and negative.
- Control of pulses must be through 3.3 or 5V tolerant logic
- Pulses height must be selectable (say with a jumper?) for ~20V, 40V, 80V (for positive pulses) and -20, -40V, and -80V for negative.
- Only power supply available is 5V
- See this application note - recommend MD1213 and TC6320
- Possible (but not used in the end) high voltage source: https://datasheets.maximintegrated.com/en/ds/MAX5025-MAX5028.pdf (3 -> 30V) to be used with a 555 DC-DC convertor
- Signal back from the diod is clipped by MD0100 + back to back diods.
To be powered at 5V only.
- HV: NMT0572SC
- Pulser : MD1213 and TC6320 -> see Fig.6 here, bipolar 3 level pulser.
- TC6320, undamped, detailed here.
- TC6320 http://ww1.microchip.com/downloads/en/DeviceDoc/20005697A.pdf for the datasheet
- Protection: MD0100+diods -- should be enough, see bottom of page 1, or Fig 9
- Check a design w/ this idea which is similar to this other idea or this last idea.
- IMPORTANT - do these corrections for a bipulser.
- A new unipulser design is on the way
- Preliminary tests
- Sofian (for preparing the field with Murgen)
- Ivan for the TC6320TG