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.

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.