microBrute DRSSTC Tesla Coil Kit
November 2019, Rev 5
− 33 −
Copyright © 2011, Eastern Voltage Research, LLC
microBrute DRSSTC Instruction Manual
1. After putting on your safety glasses, plug in the Control Power AC power
cord. This is the AC power cord that goes to the 18VAC, 1A control transformer.
Note that U4 (UCC373232), U5 (UCC37321), and the primary coil should NOT
be installed at this time. Using a multimeter, verify that the following voltages
are correct. If they are not, then there is a problem with your circuit that needs to
be diagnosed and corrected.
DO NOT connect the HV Resonator Power Cord at this time!
DO NOT connect the primary coil to the PCB board at this time.
Check
Component
Measuring Point
Voltage
U6, LM7815
Pin 1 (Positive)
25V
±
5V
U6, LM7815
Pin 3 (Output)
15V
±
0.5V
U7, LM7805
Pin 3 (Output)
5V
±
0.5V
U4, UCC37322
Pin 1, Pin 8 (Vcc)
15V
±
0.5V
U5, UCC37321
Pin 1, Pin 8 (Vcc)
15V
±
0.5V
U1, SN74HC14
Pin 14 (Vcc)
5V
±
0.5V
U2, SN74HC74
Pin 14 (Vcc)
5V
±
0.5V
U3, SN74HC08
Pin 14 (Vcc)
5V
±
0.5V
U21, LM311
Pin 8 (Vcc)
15V
±
0.5V
U22, 555 Timer
Pin 8, Pin 4 (Vcc)
5V
±
0.5V
Note: All voltages should be measured with respect to the GND screw terminal.
2. Verify that both LEDs, D1 and D2, are illuminated. If they are not, and the
voltages above are correct, they may be installed backwards.
3. Unplug the 120VAC power cord. Due to the capacitor storage on the board, it
may take about 10 seconds for the power to bleed off. Wait until the LEDs
completely turn off before proceeding to the next step.
4. Install U4, UCC37322 Gate Driver. Note that one end of the IC is marked by
a dot, notch, or band; this end MUST be oriented as shown on the PCB layout.
5. Install U5, UCC37321 Gate Driver. Note that one end of the IC is marked by
a dot, notch, or band; this end MUST be oriented as shown on the PCB layout.
