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There is also a set of resistors on the back that you can short to set it to 5v. I will try that as well. [email protected]> wrote:

Farhan: We used one of those in the another project. The voltage is adjusted with a small Phillips head screw driver. Just be aware that it is very easy to torque the set screw right off the board. It

Same chip!

Hi All, Thanks for your suggestions. ?I did think about paralleling across the relay coil. ?Adding a few milliamperes of load to the ULN2003A driving the RXRelay should not overload the device but I

Just found these on The Amazon and ordered them to play with: https://www.amazon.com/gp/product/B08HQDSQZP (No promotion or endorsement of Amazon implied. I can just get these next day from them…)

Hi Ashhar, 1) I tend to agree. Much more potential to add functionality to the waterfall. 2) Agreed. 3) Agreed. I have a few other thoughts: a) Change the band buttons to two band buttons, BAND UP and

Ok understood... I have a few of the below in the parts bin so could potentially modify my sbitx to use this instead... slight overkill though... ;)

Peter, At present we use an LM33, linear regulator to drop 13.8v to 5v. This takes almost 1.5A current on rx. With this mod, the radio is running cool and the current draw is less than 0.5A. - f

What is the purpose of this mod or what is the issue... not quite following ....

Raj, I have measured the switching frequency to be exactly 250 khz. The attached datasheet is saying 380 khz or something like that.

See attachment !

Diagram is attached. (Pasted) Raj

Those are the ones. Any idea of the chip used?

https://www.electronicscomp.com/mini-360-step-down-buck-converter-power-supply-module MP2307 is the chip Raj

Would it be possible to change to a LM1084-5.0? Vy73 de Rolf, DL8BAG

Looks like a DROK design..... https://www.amazon.com/Regulator-DROK-Converter-Step-Down-Transformer/dp/B0758ZTS61 or very similar to this.....

https://www.electronicscomp.com/xl6009-dc-dc-adjustable-step-up-boost-power-converter-module-india

It's called "mini buck converter" Search ebay or aliexpress. de oz9ny, niels

The rpis are fine at 5.5v, i have a hundred baking for a few hours before they are shipped out. My own dev system is never switched off. You can see the activity on my callsign on pskreporter. - f

Farhan In the sBitx the pi is powered via 5V pins not the USB-C connector. The 5V pins is on the output side of the pi's powersupply circuit. So there is no protection against higher voltage. So to be