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I would like to get a complete kit for the Lathe-E-Boy lathe controller, as published in your January 2018 issue (siliconchip.au/Article/10933). If that is not possible, then maybe links to suppliers of kits for the Induction Motor Speed Controller (April & May 2012, August 2013; siliconchip. au/Series/25) and the Micromite Plus Explore 100 (September & October 2016; siliconchip.au/Series/304). I appreciate any help on the above. (H. G., Bunbury, WA) ● There is no complete kit for the Lathe-E-Boy as it is too specialised. However, we have an almost complete kit for the Explore 100, just lacking the touchscreen (siliconchip.au/ Shop/20/3834). There were complete kits for the Induction Motor Speed Controller released by Jaycar and Altronics, but that was over ten years ago, and they have both since discontinued their kits. The controller/IGBT IC used in the IMSC has not been manufactured for several years. We bought a small stock that we sold through our website, and at the time of writing, we only have one left (siliconchip.au/Shop/7/2814). The only other source we can find for the controller/IGBT IC is Ali­Express. Their provenance is unknown, but presumably they will work. Therefore, except for the Explore 100 part of the design, you would have to gather your own parts. Before ordering the STGIPS30C60 IC from us or anyone else, check that all the other parts are still available. You would need to get a copy of the IMSC parts list, which is on page 72 of the May 2012 issue. Advertising Index 2.5GHz Frequency Counter troubleshooting all the settings down. That should also result in a wider volume control range. If that isn’t enough, the maximum gain can be changed by varying a couple of resistor values. The value of the 10kW resistors between pins 6 & 7 of IC2b/IC4b will reduce the maximum gain and probably also reduce the minimum output. Increasing the values of the 2.2kW resistors connected to diodes D1-D4 should also reduce the maximum output level. Parts for the Induction Motor Speed Controller Altronics.................................29-32 Dave Thompson........................ 103 DigiKey Electronics....................... 3 Emona Instruments...............9, IBC Icom Australia............................... 6 Jaycar............................. IFC, 49-56 Keith Rippon Kit Assembly....... 103 Lazer Security........................... 103 I built your 2.5GHz 12-Digit Frequency Counter (December 2012 & January 2013; siliconchip.au/Series/21), and it is partially working but not in all modes. Frequency measurements work and are accurate, but it seems to lock up on the 100MHz or lower range in Period mode. The display simply doesn’t update. The FREQ/PERIOD line toggles LD Electronics........................... 103 Microchip Technology......... 7, OBC Mouser Electronics....................... 4 PCBWay................................. 10, 11 PMD Way................................... 103 Rigol............................................... 9 SC GPS Analog Clock................. 23 Silicon Chip PDFs on USB......... 28 Silicon Chip Shop...................... 33 Silicon Chip Back Issues........... 41 The Loudspeaker Kit.com.......... 83 Wagner Electronics....................... 8 104 Silicon Chip Errata and Sale Date for the Next Issue LEDsales................................... 103 when the button is pressed. Both Green LEDs light up properly in period mode, and there is a 1MHz signal at TP2. Could it be a PIC programming problem? (S. C., Revesby, NSW) ● If it displays the frequency, we know the PIC is working; it’s very unlikely the frequency mode would work if it weren’t programmed correctly. The FREQ/PERIOD signal from O4 (pin 12) of IC23 goes to three places: pins 1 & 2 of IC12a, pin 13 of IC13d and pins 12 & 13 of IC18d. Check that there is continuity from pin 12 of IC23 to all those other pins, and verify that they change levels correctly when switching between frequency and period modes. If those seem correct, check that the outputs of those gates are feeding to the right places. That means checking for continuity from pin 12 of IC12 to pin 3 of that same IC, from pin 11 of IC18 to pin 2 of IC11 and from pin 11 of IC13 to pin 10 of IC12. Use the Fig.4 circuit diagram to follow the flow of all those control signals to their ultimate destinations and verify that everything is connected correctly. You will likely find that one of the signals does not flow through due to either a bad solder joint, a pin of an IC not being inserted properly in the circuit or (less likely) a faulty or incorrect IC. Fixing that should get the period function working. At the same time, it would be a good idea to check that all components are correct types in the right positions and examine all the solder joints to ensure they have been properly formed. The fault can almost certainly be traced back to those sorts of problems. SC Breadboard PSU Display Adaptor, December 2022: there was an error in the software (line 65 of main.c) that meant that the wrong analog channel was read during calibration of the second current setpoint. That did not affect regular operation but made calibration difficult. We have fixed this and updated the software to V7; the correct HEX file for programming the PIC16F18877 is now 0411222B.HEX. 30V 2A Bench Supply Mk2, September-October 2023: in Fig.6 on page 76 of the October 2023 issue, the ribbon cable should loop through the top of the connector and terminate at the bottom, not the other way around, as was shown in the diagram. 16-bit Precision 4-input ADC, November 2023: the name for the second library on p48 under “Arduino software libraries” should be “Rob Tillaart”, not “Rob Tillard” and the link should be https://github.com/RobTillaart/ ADS1X15 Next Issue: the January 2024 issue is due on sale in newsagents by Thursday, December 28th. Expect postal delivery of subscription copies in Australia between December 27th and January 15th. Australia's electronics magazine siliconchip.com.au