Shared Projects by dewhisna

Driver board for a Dual-Resonance Solid-State Musical Tesla Coil. This version consolidates the previous V1, V2, and V3 designs into a single modular form. It also does away with the PLL circuit which doesn’t work well on the larger coils.

DRSSTC (Dual-Resonant Solid-State Tesla Coil) Data Acquisition Board V1 – designed to amend the DRSSTCDriver V1-V3 boards, such as this board to provide some of the data acquisition (DAQ) features of the future DRSSTCDriver V4 that will have integrated DAQ support.

This board is designed to be used with the SFP2TTL Small Form-Factor Pluggable Fiber Optic Transceiver to TTL V1 Board to provide a TTL to Fiber-Optic communications link to the PC and/or with a WIZ850io Ethernet interface.

The Vbus1 and Vbus2 analog inputs are differential 0-1000V inputs, designed to monitor the main DC power bus voltage for the Tesla Coil, measured via ADC0 and ADC1. Vct1 and Vct2 are single-ended 0-10V inputs, designed to monitor the current-sense transformer from the over-current-detector circuit of the Tesla Coil Driver circuit, measured on ADC2 and ADC3. Alternately, Vct1/Vct2 can be reassigned to a LEM HASS-series bi-directional hall-effect current-transducer, measuring its 0-5V output on the Vct1 channel and its Vref (2.5V) output on the Vct2 channel, based on jumper selection. There’s two high-precision instrumentation amplifier circuits to read PT100-RTD temperature sensors, measured on ADC4 and ADC5. There’s two low-precision thermistor temperature inputs, Therm1 and Therm2, designed for 10K 3950beta thermistors, measured via ADC6 and ADC7.

Digital inputs PB0 and PB1 are assigned to Drive and Enable signal inputs from the Tesla Coil Driver to measure the coil’s resonant frequency via Timer1. PD4 and PD5 are assigned to Lockout and Limit signal inputs from the Tesla Coil Driver to monitor lockout/limit event triggers. PD6 and PD7 are assigned to single-wire DS18B20 digital temperature sensors.

ERRATA: The two DS18B20 ports are missing the required 4.7K pull-up resistor to +5V on their data I/O line. These can be added by placing a 4.7K 0805 SMD resistor across pins 1 and 2 on both J13 and J14.

A copy-and-paste error in the silkscreening for J8 has it incorrectly labeled as ‘Therm1’ instead of ‘Therm2’ (on both top and bottom).

Converter for Small Form-Factor Pluggable Fiber Optic Transceiver to TTL logic signals.

Dual-Resonance Solid-State Tesla Coil 340VDC Bus Supply (from 120VAC or 240VAC).

This version is designed to be used with large electrolytic capacitors, such as Cornell-Dubilier 500C series screw-terminal mount. The prototype circuit is using two 10,000uF 450VDC Cornell-Dubilier 500C series capacitors. Or optionally, you can use the DRSSTC Bus Caps V2 board to mount smaller, through-hole, bus caps to this board using 710-7461097 : Würth Terminals WP-BUFU Pin-Plate 16Pin Bush M6 180A.

This design replaces the older DRSSTC Bus Supply V2 version.

DO NOT BUILD – this design has oscillation issues in the voltage references causing continual false alarms. It’s useless…

LiPo Battery Low Voltage Monitor for 2S and 3S battery packs with audible alarm. Designed for low-end RC Airplanes to sound warning when it’s time to land. Design criteria includes low-power consumption and small size.