betwixt
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Today, 10:04Another method is to use an external pipe fixed near the bottom of the tank so you can monitor from outside where it is environmentally easier. If...3 replies | 145 view(s)
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Today, 09:53betwixt replied to a thread Regulated Joule thief, how to increase current? in Analog Circuit DesignYou could look at the MAX1795/1796/1797 devices which work down to around 0.7V input and have regulated outputs. Alternatively, there are...10 replies | 172 view(s)
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Today, 09:31I can't open your attachment but it may be due to slow internet at my end - getting a massive 20K download speed today :x The capacitor technique...18 replies | 839 view(s)
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Today, 00:20You only use one quarter of the ADC resolution and I'm not sure you are writing anything to the DAC. Even if you were, it would only be zero or full...2 replies | 126 view(s)
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Yesterday, 20:19Tidied up a little and with the counting and checking added: // CONFIG #pragma config FOSC = HS // Oscillator Selection bits (HS oscillator)...16 replies | 680 view(s)
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Yesterday, 16:58The INT pin on the PIC is the safest way to count, it uses the external interrupt functionality. You might be able to use an ordinary...16 replies | 680 view(s)
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Yesterday, 12:27betwixt replied to a thread Distace measurement using ultrasonic sensor with microcontroller 8051 in Microcontrollers... It is very essential for us that you show your work so far. We try to help and teach people but we do not do your work for you. Brian.1 replies | 79 view(s)
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Yesterday, 12:23Of course I would have to kill you for reverse engineering one of my products. :fight: The principle is quite simple though: 1. decide on a PIC...18 replies | 839 view(s)
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Yesterday, 11:56betwixt replied to a thread Regulated Joule thief, how to increase current? in Analog Circuit DesignNote the one in the schematic draws 1A, it won't run for long from an AAA cell! Before going further, consider the likely power drain from the...10 replies | 172 view(s)
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Yesterday, 10:00Susan, Speaking as a moderator, we do see many "I found it on the internet, it was for EL34 beam tetrodes but I converted it to work on a PIC"...16 replies | 680 view(s)
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20th March 2019, 22:34First you need to tell a little more specification: Counting up to 32000 then enabling the air jet is easy but what happens next? Does the jet...16 replies | 680 view(s)
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20th March 2019, 22:30The technique I use on a commercial product I designed uses a PIC MCU. It alternately drives two probes which have a 100nF capacitor between them....18 replies | 839 view(s)
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20th March 2019, 17:23Comments: You don't start with the LED turned off. Nothing counts the pulses. I suspect you want to configure the INT0 interrupt rather than...16 replies | 680 view(s)
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19th March 2019, 20:42betwixt replied to a thread Turn light by usin MOC3021/BT136 and TTP223 Module to turn on 220v lamp in Elementary Electronic QuestionsThe schematic doesn't have any current path through the triac so it can't possibly work. To make an AC capacitive dropper to drive an isolated...3 replies | 145 view(s)
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19th March 2019, 20:31betwixt replied to a thread MCP4261 burnt and hot after power on half hour in Elementary Electronic Questionslaoadam, what wwfeldman is suggesting is that the fault is not in the (confusing) schematic you show but due to something connected to the P0W or P1W...8 replies | 247 view(s)
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19th March 2019, 12:07betwixt replied to a thread [SOLVED] ON/OFF controller IC with retaining its state after power resume in MicrocontrollersEEPROM is by far the easiest method to use. Just read the state when powered up and set the switch accordingly. When the switch setting changes, just...9 replies | 214 view(s)
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19th March 2019, 09:37It is an SR latch and it should work with some caveats: 1. The water container must be electrically isolated, no other electrical connections (via...18 replies | 839 view(s)
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18th March 2019, 23:47betwixt replied to a thread Turn light by usin MOC3021/BT136 and TTP223 Module to turn on 220v lamp in Elementary Electronic QuestionsSchematic doesn't make sense I'm afraid - have another go at tracing it. WARNING - a touch sensor wired to a non-isolated 220V AC supply is a...3 replies | 145 view(s)
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18th March 2019, 17:13betwixt replied to a thread Best microcontroller for WPA2 Enterprise connection? in MicrocontrollersI've never tried it but I can't see any reason why the certificate can't be saved to an SD card. It is only a text file. This might give you some...9 replies | 186 view(s)
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18th March 2019, 11:21betwixt replied to a thread Best microcontroller for WPA2 Enterprise connection? in MicrocontrollersI use WROOM32 modules with much larger memory in them than the basic processor. A WROOM32 with a spring socketed development board is a powerful...9 replies | 186 view(s)
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18th March 2019, 09:46betwixt replied to a thread Room Temperature using MCU in Hobby Circuits and Small Projects ProblemsThat depends entirely on the kind of motor and it's power requirements. Tell us more and we will try to help, at the moment we don't know anything...4 replies | 326 view(s)
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18th March 2019, 09:42betwixt replied to a thread Best microcontroller for WPA2 Enterprise connection? in MicrocontrollersWithout knowing how much memory you actually need it's difficult to advise but you could consider ESP32 as an alternative to ESP8266. From the...9 replies | 186 view(s)
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17th March 2019, 13:05betwixt replied to a thread Why is single channel voltage data-logging so expensive? (£96)? in PC Programming and InterfacingThere is a free version of the compiler I use but the full 'PRO' version only costs £50 and it has full debugging and simulation (digital and analog)...8 replies | 918 view(s)
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17th March 2019, 09:57betwixt replied to a thread Why is single channel voltage data-logging so expensive? (£96)? in PC Programming and InterfacingI appreciate your honesty about the software but it really is VERY easy. 1. configure the registers including setting the PWM rate. 2. detect...8 replies | 918 view(s)
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16th March 2019, 21:45betwixt replied to a thread Why is single channel voltage data-logging so expensive? (£96)? in PC Programming and InterfacingI'm not sure exactly what you are trying to record in the log but 'reading every 200uS and store the maximum one every second' after passing through...8 replies | 918 view(s)
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15th March 2019, 09:46betwixt replied to a thread Need a equivalent for microcontroller SST89E516RD in Service Manuals, Requests, Repair TipsFrom the first paragraph of the data sheet: Brian.1 replies | 167 view(s)
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14th March 2019, 13:08You are missing the point. The clock speed only determines how many instructions the 8088 can execute in a given time, the rest of the system has to...11 replies | 307 view(s)
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14th March 2019, 11:03Neazoi, there are two factors at play, one is the propagation delay (time between a transition or control change at the input reaching the output)...11 replies | 307 view(s)
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14th March 2019, 10:01If you mean the 74F573, 74F244 or 74F245 devices, yes in theory if you can find an MCU running at a few GHz clock rate. They are 'Fast' 74 series...11 replies | 307 view(s)
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