j4cbo
100+ Head-Fier
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- May 13, 2006
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I haven't built this yet, but I do have the basic design worked out...
- Monitoring done with Atmel ATtiny24 microcontroller
- Two differential input channels supporting any amplifier topology (2-channel, 3-channel, 4-channel differential, single- and dual-power-rail)
- Onboard +5 transformer and supply, for use with momentary power switches
- LED output; the micro can be programmed to flash during power-up and power-down, or when offset protection triggers
- Power rail monitoring for over/under-voltage cutoffs
- All analog stuff done with one TL084 quad op amp
- Charge pump inverter included for -5 power supply
- The TL084 power inputs are supplied with diodes, so it runs off of the larger of +/- 5 volts or your amplifier's power rails (won't run in to the +5 rail with an F1-type amp, for example)
- Two relay connections (for output and mains)
- RS232 for voltage/limit-setting, real-time monitoring, firmware updates, etc.
Here's the schematic.
Thoughts? Suggestions?
- Monitoring done with Atmel ATtiny24 microcontroller
- Two differential input channels supporting any amplifier topology (2-channel, 3-channel, 4-channel differential, single- and dual-power-rail)
- Onboard +5 transformer and supply, for use with momentary power switches
- LED output; the micro can be programmed to flash during power-up and power-down, or when offset protection triggers
- Power rail monitoring for over/under-voltage cutoffs
- All analog stuff done with one TL084 quad op amp
- Charge pump inverter included for -5 power supply
- The TL084 power inputs are supplied with diodes, so it runs off of the larger of +/- 5 volts or your amplifier's power rails (won't run in to the +5 rail with an F1-type amp, for example)
- Two relay connections (for output and mains)
- RS232 for voltage/limit-setting, real-time monitoring, firmware updates, etc.
Here's the schematic.
Thoughts? Suggestions?