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Discussion Title Created date
Transparent debug/calibration/logging via dual port ram?
Assuming i have an embedded processor running in some device, if i wanted to be able to see what it was doing, and be able to change data on the fly, but without imposing any...
Saturday, 16 November 2013 - 21:21
Any Infineon C-16 uC experts around??
Hey all! Is anyone an expert in the Infineon C-16 series processors? I'm doing a bit of reverse engineering, and just wondering if the code in that^^^^ is "protected" or could be...
Tuesday, 5 November 2013 - 14:55
Like a Lemo connnector (but cheaper)??
I'm looking for a suitable connector to break the ISP and some debug pins out from a device. I'd love to use a multi-pin Lemo connector, ie: They are small, robust, and have...
Sunday, 20 October 2013 - 18:09
Switching gain of an opamp, with uC port IO?
I have a device that needs some analogue inputs, so far so good i hear you say, but i'd like to be able to change the range of the inputs (like on a multimeter etc). However, i...
Thursday, 17 October 2013 - 12:03
Caught out by AVR input pin protection?
I have a embedded controller design, of which i have now made a reasonable quantity (say approx 30of them). The design uses a "wake up" input to bring the unit out of power down...
Sunday, 6 October 2013 - 10:46
High current (50A) right angle PCB connector / terminals
Hi all, I'm designing an automotive (nominal 12Vdc) power distribution device, that "smart switches" (overcurrent, undervoltage protection etc) 8 output channels. Each channel...
Monday, 2 September 2013 - 15:57
simulate (electronically) a resistive type sensor?
Say you had a resistive type sensor, like a thermistor or similar, what circuit would i use to "simulate" this sensor. i.e. a circuit, controlled by a micro, that can be put in...
Sunday, 25 August 2013 - 20:38
"Potting" pcbs & specifically connectors?
Up till now, i have had the luxury of making very low volume, high value electronics devices. This is great, because i could afford to just CNC a custom enclosure to suit the...
Sunday, 18 August 2013 - 10:51
Constant Current (ish) opto-coupler input circuit
Hi all, I have a need for an opto-coupled input, that can operate from as wide a range of voltages as possible. The following circuit works ok in LTspice: However, i know we have...
Saturday, 17 August 2013 - 19:11
Software configurable IO ?
I'm in the process of designing an input module, that will sit and monitor a range of different inputs. Some inputs will be purely digital (on/off) and some will be analogue....
Tuesday, 23 July 2013 - 18:49
Protecting 75ohm current shunt from accidental overvoltage
I have a sensor which outputs a current signal, and the datasheet suggests using a 75 ohm shunt resistor to turn that into a voltage (to read with an ADC or whatever). The output...
Wednesday, 22 May 2013 - 16:56
Peak and hold driver - analogue or software implementation?
I'm looking at a peak and hold driver, that uses an adjustable voltage source to boost the load current initally (overcome the loads inductance). After approx 1ms it then moves to...
Friday, 19 April 2013 - 14:53

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