The DCDC_3V3_400V_V1 module is a high voltage source for powering a wide range of Geiger-Muller tubes with different anode-cathode voltage levels, and can also be used as a low-power high voltage source in other DIY projects.

The need to set different output voltage levels is one of the reasons for installing a tuning potentiometer in the module.

The other adjustment components are resistor R1 and capacitor C1.

For explanation, please see the block diagram below.

The left part of the block diagram shows the structure of the high-voltage converter DCDC_3V3_400_V1 module.

The right part of the block diagram shows the components of the power consumers from the DCDC_3V3_400_V1 module integrated into the DIY project, according to the user’s design.

The output cascade of the DCDC_3V3_400_V1 module is a high-voltage multiplier. In projects of radiation detectors based on the Geiger-Muller counter, the tube receives a high voltage of 300 to 2000 volts through the R1C1 circuit.

The resistance, capacitance and voltage values for R1 and C1 depend on the type of tube or DIY circuitry. For this reason, R1 and C1 are not installed on the DCDC_3V3_400_V1 module.

Another reason for the absence of R1 and C1 on the module is the possibility of damage (electrical breakdown) of C1 when adjusting the voltage with a potentiometer.

Taking these factors into account, we recommend that when testing the DCDC_3V3_400_V1 module, you solder or connect a circuit to the output contacts according to the following scheme:

The voltage adjustment and measurement should be performed similarly to the steps described in the Initial Diagnostics Manual for the Geiger counter module GGreg20_V3.

We launch “Cyber Monday” campaign from 24.11 to 30.11 and set 10% discount when buying any of our modules on iot-devices.com.ua and Tindie and Etsy trading platforms.

Pay attention to our charity product GGreg20_ES

As well as our popular modules:

• GGreg20_V3 radioactive particle detector with SBM-20 ggreg20_v3 Geiger tube
• DCDC_3V3_400V_V1 module is a high voltage 3.3V DC to 400V converter: dcdc_3v3_400v_v1.
• I2CUI4_V1 User Interface – I2C module with 5-button keypad: i2cui4_v1

Our popular modules:

Radioactive particle detector GGreg20_V3 with Geiger tube SBM-20 ggreg20_v3

The DCDC_3V3_400V_V1 module is a high-voltage 3.3 V to 400 V DC voltage converter: dcdc_3v3_400v_v1

I2CUI4_V1 User Interface – I2C module with 5-button keyboard: i2cui4_v1

Please note that from September 1, 2022 , the function of high voltage regulation has been removed. The voltage level of 400 volts is fixed by hardware means.

Update: February 2023 The feedback we receive from customers about the planned implementation of the changes has led us to the decision not to rush to fix the voltage level on the module, as this limits the possibility of using other tubes compatible with the module. Therefore, we have decided not to make any changes at all and are supplying the module in its original configuration.

This does not change the hardware scheme or functionality of the module. And it only simplifies the initial configuration of the module. From now on, the user does not even need to think about whether the voltage level in the high-voltage part of GGreg20_V3 is set correctly.

At the same time, if you need a module with high voltage regulation for your project, please consider the module DCDC_3V3_400V_V1: High Voltage Module

DCDC_3V3_400V_V1 is a new release of a miniature module designed to convert 3.3 volts to 200 – 1200 volts for use as a high voltage generator to power a Geiger-Muller tube in ionizing radiation dosimeters.

The new version of DCDC_3V3_400V_V1 adds a converter (booster), which converts the input supply voltage of the module in the range from 2.2 volts to 5.5 volts into an output voltage of 5 volts. Thus, improved stability of the module characteristics was achieved.

You can get a detailed description and technical datasheet (including comparison of the characteristics received by the new module) of the DCDC_3V3_400V_V1 product and order a device (for orders within Ukraine) on the “IoT-devices” website at the link order DCDC_3V3_400V_V1

For international orders, the product is located in the “IoT-devices” store on Tindie at the link: order DCDC_3V3_400V_V1

About IoT-devices

IoT-devices is a Ukrainian privately held firm, founded in 2020 in Kyiv, that develops and manufactures its own ecosystem of electronic modules for building smart devices in the field of the Internet of Things. IoT-devices’ B2C model is focused on the needs of customers in consumer and embedded electronics, home automation, smart home and connected home. The company’s products allow users to study, perform laboratory work and experiments and assemble their own smart devices in the best traditions of DIY.

IoT-devices was born thanks to the support of its customers and thanks to its people, experience and love for Electronics – all IoT-devices products are designed and made with freedom & wisdom in Ukraine.