Recent content by rmeldo

Hi, A quick question please. After 10 years of soldering i am about to run out of solder wire and flux. For the wire I have been using 60/40 Lead, 22AWG (0.7mm) wire with flux inside (Roisin? the reel doesn't say). For the the flux Ihave beenusing Roisin paste. CLeaning the board from the...

No, sadly not. I had to buy it separately. The suggested one was £7.

The Youtube review did address that aspect and provided the link (Banbgood) to the very version tested. The page on Banggood had a photo of the interior of the driver box. It still not a guarantee that what I am going to get will be as good. More due diligence on my part. Finger crossed

I've gone for this one. https://www.banggood.com/Mini-V3_0-T12-Digital-Temperature-Controller-Soldering-Station-Soldering-Iron-Tips-T12-K-p-1338117.html?utm_campaign=26071159_1338117&utm_content=10535&p=BX282326066583201810&cur_warehouse=CN Good reviews, embedded heating cartridge, inexpensive...

So on the soldering iron front temperature control is useful, about 50W is plenty and a fine tip enables precision work. Reviews seems to suggest that tips with embedded heating element are superior. These ones go with the iron I posted earlier. Any thoughts/opinions? http...

Thanks everyone. did some watching on youtube for reviews and this one seemed a good product. Any thoughts? Still looking at reviews for hot air guns. Atten 858D+ seem to be a basic entry. Also wondering about a reflow oven. Definitely still in the exploration phase. Riccardo

Hi all, I am looking for some advice please. I am on the market for a soldering station/hot air gun to solder SMD components onto my boards. What features are necessary/important for soldering and reworking small components? Any particularly good brands/models? I am looking for a tool which...

Hi, this is not a Picaxe question but I think it suits the forum nonetheless. It is the kind of “fundamental circuits “ question. I am trying to devise a “button pushed circuit” but I cannot figure out how to do it. I hope it is allowed. I am using a NodeMCU (a breakout board for the ESP8266)...

So I did the maths. I looked at the option of adding a resistor in parallel with the thermistor. it is true that it linearises the response, but it also reduces the voltage change and therefore the resolution. So it is best to not fit it, as in a narrow temperature range the response is quite...

A sanity check please. It occurred to me that in applications where batteries need to last for a long time (years) a DS18B20 would not be a suitable sensor for temperature measurement, due to the fact that it takes quite a while to measure and transmit the temperature to the microcontroller. 12...

Hi, I've been trying to troubleshoot a problem all day: I don't seem to be able to switch off the boost converter with the BC327. The circuit is attached. I think I have worked out why. I think the reason is that I have the microcontroller downstream of a LDO to keep everything (including the...

Hi all, I was surfing the net (as you do on a lazy bank holiday morning) and I came across this prototype board manufacturing and assembly website: https://www.pcbastore.com/ The prices for board assembly look incredibly low. If one needs to make 10-50 off something it is really not worth...

Hi, here is a (slightly) better circuit diagram. Apologies, I don't know my way around the drawing package very well. Hopefully it is an improvement. With regards to the buck-boost, I bought two to experiment. One for regulating the voltage to the Picaxe (I don't connect directly to the...

Hi, An additional questions, this time about wiring to minimise power usage. I am working through the implementation. So far I have done some experiments to the calibration of the sensor with the multimeter by dipping the sensor into barrel. It all seem to work fine. The sensor is going to...

Hi, I bought a pressure sensor to measure water level in a tank (1-5 metres). The sensor requires 24V DC and it modulates the current in the range 4-20mA, according to the pressure reading. In regards to how to interface it with the Picaxe I was thinking of putting the sensor in series with...