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Discussion Title Created date
Protecting (external) ISP data lines
Hi all, I'm looking at an application where the device is full "potted" and generally speaking, code update/modification is done via a bootloader using CAN as the physical coms...
Saturday, 22 March 2014 - 20:37
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

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