Difference between revisions of "Zappy Module"
From Hackstrich
| Line 2: | Line 2: | ||
== Project Status == | == Project Status == | ||
| + | * 2015-02-02: Started putting together overall circuit idea. | ||
| + | * 2015-02-01: SPICEd out some ideas. | ||
* 2015-01-29: Captured waveforms of all output levels. | * 2015-01-29: Captured waveforms of all output levels. | ||
* 2015-01-05: Arranged to borrow a shock collar to characterize the output of it. | * 2015-01-05: Arranged to borrow a shock collar to characterize the output of it. | ||
| Line 11: | Line 13: | ||
** I2C/SPI/RS232 | ** I2C/SPI/RS232 | ||
*** Could be used for instant control or programming levels/durations for later GPIO-based activation | *** Could be used for instant control or programming levels/durations for later GPIO-based activation | ||
| + | |||
| + | == Theory of Operation == | ||
| + | * Input voltage from 3-9V is stepped up to 10V using a boost converter (AZ34063U) to get the intermediary voltage rail | ||
| + | ** Or if 12V input is required, maybe use 14V or something as the intermediary voltage rail? | ||
| + | * MCU controls a FET that charges a cap from that rail via a series resistor to control charge rate | ||
| + | ** Divider on the cap feeds into an analog pin on the MCU, once the analog pin reaches the desired level the MCU shuts the FET off again | ||
| + | * Once cap is charged, MCU pulses a FET that dumps the charge on the cap through a 1:100 (or so) transformer and to the output | ||
| + | ** 0.1-1kV should be achievable via timing the charge FET | ||
| + | * May need a dump resistor if the cap is charged and needs to be discharged without zapping? | ||
| + | ** Could use the series charging resistor w/ a different FET to dump the cap through it? | ||
[[Category:Current Projects]] | [[Category:Current Projects]] | ||
Revision as of 02:34, 3 February 2015
Zappy Module is a board-level module that takes control input via some kind of protocol and outputs signals to zap someone like shock collars do.
Project Status
- 2015-02-02: Started putting together overall circuit idea.
- 2015-02-01: SPICEd out some ideas.
- 2015-01-29: Captured waveforms of all output levels.
- 2015-01-05: Arranged to borrow a shock collar to characterize the output of it.
- 2013-05: Started throwing ideas around.
Overview
- Control input options could be:
- GPIO-based, simple "zap now" input (or a couple separate inputs that you can set with different options)
- I2C/SPI/RS232
- Could be used for instant control or programming levels/durations for later GPIO-based activation
Theory of Operation
- Input voltage from 3-9V is stepped up to 10V using a boost converter (AZ34063U) to get the intermediary voltage rail
- Or if 12V input is required, maybe use 14V or something as the intermediary voltage rail?
- MCU controls a FET that charges a cap from that rail via a series resistor to control charge rate
- Divider on the cap feeds into an analog pin on the MCU, once the analog pin reaches the desired level the MCU shuts the FET off again
- Once cap is charged, MCU pulses a FET that dumps the charge on the cap through a 1:100 (or so) transformer and to the output
- 0.1-1kV should be achievable via timing the charge FET
- May need a dump resistor if the cap is charged and needs to be discharged without zapping?
- Could use the series charging resistor w/ a different FET to dump the cap through it?
