Macrofab Engineering Podcast

MEP EP #170: Start Getting CrustyParker PinoTaur MCP23S08 I/O Expanders Verse Shift Registers? Wagon Tach Project 3D printed the housing Need to run the wire from the distributor to inside the cab To knock down the distributor signal In series diode to prevent negative flyback? voltage from affecting circuit Resistor divider Zener diode to clamp to 4.7V H11L1M - Schmitt Trigger Opto Stephen MacroAmp Testing Used a variac to bring the amp up to voltage Found some of the resistances were too high It can be difficult to determine what a transformer tap will produce - I chose to guesstimate and fix it later...it works Higher gain when powered from the transformer. About 100x gain Tested into a Power amp - Works HUGE ISSUE: MICROPHONIC TUBES Next steps - Get everything in the enclosure. Wire the output transformers R.F.O. Chip component gets heat out of tight spots without leaking electrons TT Electronics has introduced a surface-mount component desi