I want to create an oscillator circuit that functions in a manner similar to the classic neon relaxation oscillator- but with a strike voltage around 10-30 volts.
This is for an energy harvesting concept, the off-state leakage of the trigger circuit is critical.
The neon circuit has some characteristics that are optimal for my project:
1) Super low leakage current - almost no energy is lost to switch leakage- the neon is almost an open circuit until the strike voltage is reached.
2) The neon stays conductive until a relatively low voltage level - most of the capacitor energy is used.
I could use an SCR to switch my main load, so the trigger circuit could be a relatively high impedance when it triggers.
The current sourced to charge the capacitor must / will be below the SCR's minimum hold current so it will turn off when the capacitor discharges.
Perhaps a DIAC would do it? I have to investigate the leakage and voltage ratings of these devices.
Any ideas?
This is for an energy harvesting concept, the off-state leakage of the trigger circuit is critical.
The neon circuit has some characteristics that are optimal for my project:
1) Super low leakage current - almost no energy is lost to switch leakage- the neon is almost an open circuit until the strike voltage is reached.
2) The neon stays conductive until a relatively low voltage level - most of the capacitor energy is used.
I could use an SCR to switch my main load, so the trigger circuit could be a relatively high impedance when it triggers.
The current sourced to charge the capacitor must / will be below the SCR's minimum hold current so it will turn off when the capacitor discharges.
Perhaps a DIAC would do it? I have to investigate the leakage and voltage ratings of these devices.
Any ideas?
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