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Chapter 17 This Hand Controller is used with the Digital Pulse Adjuster, Digital Fuel Adjuster and Turbo Boost Controller projects described in this book. It is allows the inputting of data and displays both real-time and non-real-time tuning data. LCD Hand Controller This plug-in controller programs the Digital Pulse Adjuster, Digital Fuel Adjuster and Independent Electronic Boost Controller circuits. T HE Digital Pulse Adjuster, Digital Fuel Adjuster and Independent Electronic Boost Controller circuits all use this digital LCD Hand Controller for programming. The Hand Controller is used to enter tuning adjustments, to reset all the tuning map adjustments back to zero and to display the real time and non-realtime operation of the interceptor. If you have multiple DFAs, DPAs and TBCs, only one Hand Controller is needed but you’ll only be able to program one at a time. The Hand Controller has a 2-line LCD, eight “direction” buttons, a recessed RESET button and a RUN/ VIEW button. A DB25 socket is positioned on the side and the supplied 1.8 metre cable plugs into this socket, connecting the Hand Controller to the main module. Assembly The parts layout diagram (Fig.1) shows how to assemble the PC board. siliconchip.com.au It’s straightforward but take care with the orientation of the switches, the 4017 IC and 10μF electrolytic capacitor. The DB25 socket also has pins which are quite close together, so be careful not to form any solder bridges between adjacent tracks. It’s a good idea to check these under a magnifying glass when you have finished soldering them. The LCD is soldered directly to the PC board via its DIL (dual in-line) pin headers. The completed PC board is mounted in the supplied plastic case on 12mmlong Nylon spacers. Use 4 x 6mm countersunk screws to attach these spacers to the case. Two 6mm screws are then used to secure the bottom edge of the PC board, while two 10mm Nylon screws secure the top edge of the LCD module and the board to the remaining two spacers. The photos on the two following pages show how the controller board fits into its case. Parts List 1 Hand Controller PC board coded 05car141, 115 x 65mm 1 plastic case, 120 x 70 x 30 with clear lid (Jaycar HB 6082) – supplied fully machined with screened front panel 5 white pushbutton click action switches (S1,S2,S5,S7,S9) (Jaycar SP 0723) 4 black pushbutton click action switches (S3,S4,S6,S8) (Jaycar SP 0721) 1 SPST micro tactile switch (S10) (Jaycar SP 0600) 1 LCD module (Jaycar QP 5515) 1 4017 decade counter (IC1) 1 DIL 14-way pin header 1 DB25 PC-mount socket 1 25-pin 1.8m D-Sub male RS232 connector lead (Jaycar WC7502) 4 12mm-long M3 tapped Nylon spacers 4 M3 x 6mm CSK screws 2 M3 x 6mm screws 2 M3 x 10mm Nylon screws 1 100mm-length 0.8mm tinned copper wire 1 10µF 16V PC electrolytic capacitor 2 10Ω 0.25W 1% resistors 1 10kΩ horizontal trimpot (VR1) PERFORMANCE ELECTRONICS FOR CARS 105 Fig.1: the PC board is easy to assemble. Make sure that you install the links and take care when soldering the DB25 socket into place. Note also that the switches, IC and electrolytic capacitor are polarised. The LCD is connected using a 14-way DIL pin header and the pushbuttons are all soldered directly to the PC board. The PC board is attached to the Nylon spacers with four screws. Two 10mm screws pass through the holes on either side of the top of the LCD, while two 6mm screws pass directly through the PC board near its bottom edge. 106 PERFORMANCE ELECTRONICS FOR CARS siliconchip.com.au Fig.2: the circuit uses 10 switches, an LCD module, a 4017 counter (IC1) and a DB25 socket. Trimpot VR1 sets the display contrast. The Hand Controller circuit is based on an LCD (liquid crystal display) module and a 4017 decade counter (IC1). Signals from the microcontroller within the main project that the Hand Controller is connected to drive both the LCD Nylon spacers are used to support the PC board. These are attached from the bottom of the box using Nylon CSK screws. If the switches don’t protrude sufficiently through the front panel, some small washers can be placed under these standoffs. module and IC1 via a DB25 socket. IC1 has 10 outputs and each output goes high in turn as it is clocked at its pin 14 input. When reset (at pin 15), the “0” output at pin 3 is set high. Each output connects to a switch. If one switch is closed, it will pull pin 9 of the DB25 socket high when ever its corresponding output on IC1 is high. In this way, the connected microcontroller can recognise which switch is closed. The LCD module is driven using data lines DB7-DB4. The display readings are entered via the data lines of the LCD module and controlled via the E and RS (Enable and Register Select) inputs. Trimpot VR1 is used to set the  display contrast. The DB25 socket protrudes through a cutout in the side of the box. siliconchip.com.au PERFORMANCE ELECTRONICS FOR CARS 107